Active Recovery versus Passive Recovery between Short Duration (4 to 30 s) Sprints

Sprints of very short duration (2 to 4 s) are frequently used during team sports, while sprints of 5 to 30 s appear during individual competitive sports.
In addition, training sessions of many sports include activities of this duration performed with a maximum intensity. These sprints may be performed with different intervals depending on the training purpose. In this case, it is possible that the changes in performance with successive bouts will be affected by active recovery within the interval.

Performance in cycling and running sprints

Early studies used repeated sprint protocols to examine the effects of active recovery on performance. The studies of Signorile et al., (1993) and Ahmaidi et al., (1996) showed that active recovery could be beneficial to performance. Signorile et al., (1993) applied a set of 8x6 s cycling sprints with a 30 s interval. Mean power was better after active recovery compared to passive recovery. Similarly, performance was improved when the same duration sprints (6 s) were applied with a 5 min interval; especially during sprints with a high resistive load (i.e. 6 kg; Ahmaidi et al., 1996). However, a cycling protocol applying 10x10 s sprints with 30 s intervals demonstrated no significant difference in mean and peak power after active or passive recovery (Matsushigue et al., 2007). A repeated sprint protocol with short duration sprints that simulates team-game sprint duration has been applied (6 repetitions of 4 s sprints with 21 s interval) and has also been tested after active recovery. Nine male moderately trained individuals followed this protocol during cycling sprints in the study of Spencer et al., (2006). The total work produced was not different after active or passive recovery; although peak power decreased more during the last sprints in the active recovery trial (Spencer et al., 2006). Similarly, using the same protocol in team sport athletes, it was found that peak power was reduced after active compared to
passive recovery although no differences in total work (3.9% less after active recovery; Spencer et al., 2008) were observed.
The same protocol of 6x4 s sprints was applied in 10 male individuals during running on a non-motorized treadmill. Buchheit et al., (2009) found that active recovery, corresponding to 45% of the individual vVO2max, applied during the 21 s interval decreased the running speed (active recovery: 3.79±0.27 vs. passive recovery: 4.09±0.32 m·s-1) and stride frequency. Α clear negative effect of active recovery was demonstrated when sixteen basketball players participated in a field study and performed 10x30 m shuttle running sprints with short interval duration (i.e. exercise to interval ratio 1:5; Castagna et al., 2008). The basketball players participated in the last study showed an increased fatigue index and average running time when active compared to passive recovery was applied during the 30 s intervals between the 30 m sprints (fatigue index 5% vs. 3.4%; average running time 6.32 s vs. 6.17 s).
When comparing running to cycling exercise, the decrement of performance after active recovery is more evident in running. This was observed during the same protocol applying a work to interval ratio of 1:5. The participants in the above-mentioned studies (Spencer et al., 2006, 2008; Buchheit et al., 2009) had a similar training and fitness status (moderately trained, VO2max: 53-55 ml·kg-1·min-1). Although recovery between sprints may be related not only to VO2max but also to other aerobic fitness index (Bogdanis et al., 1995), the different response to active recovery during cycling (improved or no different performance after active compared to passive recovery) compared to running (decreased performance after AR) protocols is not easy to explain.
Time is important, not only for the duration of a sprint, but also for the recovery interval. When a short interval is applied between sprints of 15 to 30 s, the effects of active recovery on fatigue are much clearer. This has been shown in the study of Dupont et al. (2007) when a 30 s cycling sprint was performed after a 15 s sprint with a 15 s interval of either active or passive recovery between sprints. Mean and peak power was significantly reduced after active recovery compared to passive recovery (Dupont et al., 2007). In contrast, when long interval duration is applied between 15 to 30 s sprints, it seems that active recovery may have a beneficial effect. For example, active recovery applied during a 4 min interval between two 30 s sprints improved mean power output by 3% compared to passive recovery (Bogdanis et al., 1996). Similarly, a better maintenance of mean power was reported by Connolly et al. (2003) during 6x15 s sprints performed when the participants were cycling at 80W during the 3 min interval period between sprints. The improved performance after active recovery compared to passive recovery in the studies of Bogdanis et al. (1996) and Connolly et al. (2003) was confirmed by Spierer et al. (2004) in trained and untrained individuals during repeated 30 s sprints with a 4 min interval. It is interesting to note that in the study of Spierer et al. (2004) the total work increased in both groups after active recovery, although the mean power increased after active recovery in the untrained but not in trained participants.

Performance in swimming sprints

Studies applied active recovery between repeated swimming sprints and have shown that irrespective of the interval duration, performance decreased after active recovery compared to passive recovery. Three studies have consistently found decreased performance during a set of 8x25 m sprints applied with 45 or 120 s intervals in recreationally trained (Toubekis et al., 2005), well-trained (Toubekis et al., 2006) and sprint-trained swimmers (Toubekis et al., 2010). However, when a 50 m sprint was applied 6 min following the 8x25 m sprints, performance was unaffected by active or passive of recovery (Toubekis et al., 2005; Toubekis et al., 2006; Toubekis et al., 2010). Combining the results of the last three studies we showed that sprint-trained compared to untrained swimmers were less affected by active recovery at an intensity 60% of the 100 m when the interval between sprints was 120 s, although both groups decreased performance after active recovery (rest to interval ratio 1:10; effect size: sprint-trained=0.3, untrained=0.6; Figure 2).
However, well-trained swimmers (mixed group of sprint and endurance trained swimmers) showed no difference with untrained swimmers in their reaction to active recovery when the 25 m sprints were performed with 45 s intervals (Figure 2).
It is interesting to note that half of the sprint-oriented swimmers swam faster by 1.2% while the other half swam 3.2% slower in a 50 m sprint performed 6 min following the set of 8x25 m sprint (effect size=0.1). It seems that training status and/or the interval duration are important parameters when active recovery is applied between sprints, while inter-individual resposnses should be also be considered when this practice is used. In another study, two sets of repetitions were applied to simulate high intensity swimming training (Toubekis et al., 2008). The first set consisted of standard work of 4x30 s tethered swimming bouts at intensity 154% of the VO2max. This set was followed by 4x50 yard repetitions starting every 2 min (~90 s interval). It is interesting to note that when active recovery was applied during the 5 min interval between two sets of repetitions, a tendency for improved performance was observed in the second set of repetitions (Toubekis et al., 2008). In contrast, performance was decreased when active recovery was applied during the interval time between repetitions of the second set (4x50 y).

Performance in swimming sprints 1

25-m sprint repetitions (120s interval) 25-m sprint repetitions (45s interval)

Figure 2. Upper panel: Îœean time of 8x25 m sprints in untrained swimmers compared to sprint-trained and well-trained swimmers (120 s interval – left; 45 s interval - right).
Lower panel: Performance time during the 8x25 m sprints was performed either with a 120 s (left) or with a 45 s (right) interval. A greated performance decrease was observed after active recovery in untrained compared to sprint-trained with 120 s interval but no different response was observed between well-trained and untrained when the interval was 45 s. *: sprint number vs. performance time interaction. See text for details


Figure 3.

Performance in swimming sprints 2

A schematic flow of events leading to decreased performance following active recovery between short duration sprints (4 to 30 s) with relatively short interval duration (exercise to interval ratio 1:3 to 1:5)

table1 Performance in swimming sprint

table1b Performance in swimming sprints

MAS: maximal aerobic speed, I: interval, PP: peak power, MP: mean power, TW: total work, Recr: recreationally active, Mod: moderately trained, Unt: untrained, PR: passive recovery, AR: active recovery, NS: no significant difference between acteive and passive recovery, M: male, F: female.

The findings of the swimming studies support the argument that when a long duration interval (work to interval ratio 1:8 to 1:12) is applied, active recovery may be beneficial or have no negative impact on performance compared to passive recovery in sprints of about 15 to 30 s duration (Bogdanis et al., 1996; Connolly et al., 2003; Spierer et al., 2004; 50 m sprints, Toubekis et al., 2005, 2006, 2008).In contrast, performance during 4 to 10 s sprints has been shown to decrease after active recovery compared to passive recovery when a work to interval ratio of 1:3 to 1:5 is applied (Spencer et al., 2006, 2008; Dupont et al., 2007; Buchheit et al., 2009; Castagna et al., 2008). An exemption is the study of Signorile et al. (1993) who found increased performance after repeated 6 s sprints applied with a 30 s interval. In Figure 3, the physiological events that may lead to decreased performance during repeated sprint with short interval duration are summarized. Other factors such as the mode of exercise, the training status of the participants or the intensity of active recovery may be contributing factors. The issue of intensity of active recovery will be discussed later in this chapter. The studies which examined the effects of active recovery compared to passive recovery on performance are presented in Table  1.

Active versus Passive Recovery between Long Duration (40 to 120 s) Sprints

Performance in swimming sprints

The majority of studies that have examined the effects of active recovery versus passive recovery on performance during long duration sprint exercise have shown similar results. McMurray (1969) reported no differences after different modes of passive recovery compared to active recovery in performance of a 200-yard swim. In four different conditions, following a standard load exercise, the swimmers rested passively in an upright position, in supine, stood still in the water, or swum slowly during recovery before a 200-yard test (McMurray 1969). Besides this early study, further studies reported beneficial performance outcome after active recovery in different protocols using cycling or swimming. Surprisingly, no running studies have tested the effect of active recovery between sprints of 40 to 120 s duration so far. During competitions, swimmers may be asked to participate in repeated races with an interval duration of 10 to 30 minutes. It is advised that during the interval period they should follow active recovery since experimental evidence suggests that this practiceis beneficial (Felix et al., 1997; Greenwood et al.,2008; Toubekis et al., 2008a). Repetitions of 100 m and 200 yard swimming may be performed faster when active recovery rather than passive recovery is applied during a 10 to 15 min interval (Felix et al., 1997; Greenwood et al., 2008; Toubekis et al., 2008a). The effective intensity of active recovery during the above studies was reported corresponding to 100 or 200-y best time (i.e 60% of the 100-m, 65% of the 200-yard; Toubekis et al., 2008a; Felix et al., 1997) or the lactate threshold (Greenwood et al., 2008).

Performance in cyclingsprints

Exercise at intensity 120 to 130% of VO2max can be sustained for about 2 minutes before exhaustion. This intensity has been applied in the studies of Thiriet et al., (1993) and Dorado et al., (2004). Thiriet et al. (1993) reported improved performance when active recovery was used during the 20-min interval between 4x120 s bouts at an intensity 130% of the VO2max. The beneficial effects on performance were evident after either arms or legs cycling active recovery (Thiriet et al., 1993). When four repetitions at an intensity 120% of VO2max were performed until the participants were unable to maintain 70 rpm; active recovery applied during the 5 min interval improved performance by 3-4% compared to passive recovery (Dorado et al., 2004). Although the cycling bouts were performed up to exhaustion, the duration of each bout was not reported in the last study. Nonetheless, inspection of Figure 3 of the paper reveals a time range from ~40 to ~120 s (Dorado et al., 2004). During sprints of this duration, aerobic contribution becomes more important with successive sprints (Bogdanis et al., 1996a). As the authors discussed an increased aerobic contribution and increased oxygen kinetics was the main reason for improved performance after active recovery compared to passive recovery (Dorado et al., 2004). The performance results reported in the above-mentioned studies are in agreement with previous findings of Weltman et al. (1977) who reported improved number of pedal revolutions despite no differences in mean power when active recovery was applied between two 60 s sprints after a 10 and 20 min interval. However, when a short recovery period (work to rest ratio 1:2.5) was used during repeated ice skating sprints, the distance covered during a series of 7x40 s repetitions was similar after active or passive recovery (Lau et al., 2001). The ice hockey players participated in the last study performed 7x40 s sprints with 90 s interval and repeated the same set of repetitions after a 15 min interval which included 12 minutes of self-selected cycling active recovery (Lau et al.,2001).

Performance in cycling sprints

figure4 Performance in cycling sprints

Figure 4. A schematic representation of a series of events that may act to improve performance after active recovery during long duration sprints (40 to 120 s).

Discontinuous lines indicate effects that have not been proved yet. *indicate that a part of the interval is active recovery and the intensity as low as possible

A summary of studies examined the effects of active versus passive recovery between 40 to 120 s sprints is shown in Table  2. It seems that active recovery is beneficial and maintains a better performance on subsequent bouts following sprints of long duration when a long interval is available (i.e. work to exercise ratio 1:10 to 1:15). However, important issues such as the intensity and duration of active recovery are still under research. The physiological factors that may contribute to increased performance after active recovery compared to passive recovery during long duration sprints are presented in Figure 4.

The effects of intensity of active recovery on sprint performance

The intensity of active recovery may be crucial for the performance outcome. Athletes should follow active recovery at a low energetic cost while at the same time muscle blood flow must be adequately increased. A low energetic cost may be necessary for a fast recovery of high energy phosphates while an adequate muscle blood flow is required for the removal of metabolic by-products. Recent studies examined the effects of different intensities of active recovery on performance. The intensity is expressed as a percentage of VO2maxduring cycling and team-game activities (Dupont et al., 2007; Spencer et al., 2008; Maxwell et al., 2008) as a percentage of the best time or as a percentage relative to the lactate threshold during swimming (Toubekis et al.,2006; Toubekis et al., 2010; Greenwood et al., 2008). During the 21 s interval between 6x4 s sprints, both active recovery intensities were applied at 20 or 35% of the VO2max and equally decreased peak power and total work compared to passive recovery in team-sport trained individuals (Spencer et al., 2008). Similarly, when active recovery intensities corresponding to 20 or 40% of the VO2maxwere compared to passive recovery, both decreased performance in a 30 s sprint performed shortly (15 s) after a 15 s sprint (Dupont et al., 2007). It is possible that the short interval duration or the small difference between intensities of active recovery applied in the studies of Spencer et al. (2008) and Dupont et al. (2007) have masked the effects of active recovery. This may have also occurred during repeated 25 m sprints with a 45 s interval when the active recovery intensity was 50 or 60% of the 100 m velocity (Toubekis et al., 2006). Using longer interval duration (120 s) and a greater difference between active recovery intensities on the same repeated swimming sprint protocol, the results were different from previous studies (Toubekis et al., 2010). In that study the low and high intensity active recovery were estimated to correspond to 36% and 59% of the VO2max (40% and 60% of the 100-m velocity). During passive recovery and active recovery at low intensity trials, performance was better compared to high intensity active recovery (Toubekis et al., 2010). However, in the repeated swimming sprint studies, performance of a subsequent 50 m sprint (duration ~30s) swum after six minutes, was unaffected by active recovery intensity (Toubekis et al., 2006; Toubekis et al., 2010). Therefore, it is likely that long interval duration (i.e. work to interval ratio 1:10 to 1:12) in combination with very low intensity of active recovery have a beneficial effect on performance compared to a high intensity active recovery.
A different approach to test the effects of swimming intensity during active recovery was applied by Greenwood et al., (2008). The authors calculated the velocity corresponding to the lactate threshold using a speed-lactate test and subsequently asked their swimmers to perform 2x200-yard sprints with a 10-min interval using passive recovery or active recovery. The active recovery intensities reported, were below, above or at the lactate threshold. It is interesting to note that performance during the second 200 yard sprint was improved not only compared to passive recovery but also compared to the first 200 yard sprint after active recovery at a velocity corresponding to the lactate threshold (Greenwood et al., 2008). It should be noted however, that the lactate threshold velocity can be calculated using different methods and readers should be aware that no single method can be used as a gold standard (Tokmakidis et al., 1998).
During game-sports activities, it has been shown that low intensity is beneficial compared to high intensity of active recovery (35 vs. 50% of VO2max) allowing a 3% better peak power during repeated 5 s cycling sprints (Maxwell et al., 2008). These 5 s sprints were performed within 20x2-min blocks. Within each 2 min block, a 10 s standing, 5 s sprint and 105 s of active recovery were performed (Maxwell et al., 2008). During a different protocol applied by Del Coso et al. (2010), the mean power output during a 4 s cycling sprint was not different after intermittent sets performed with different active recovery intensity and different interval duration but with equal energy expenditure. In summary, it seems that very low intensity combined with a long interval duration (exercise to interval ratio 1:10) may maintain performance similar to passive recovery during short duration sprints. In contrast, active recovery intensity at the lactate threshold velocity, which is still very low intensity, may be beneficial not only to maintain but in some cases may improve performance on a subsequent sprint of 60 to 120 s duration.

The effect of exercise mode during active recovery

Few studies applied a different mode of exercise during the sprint compared to that applied during active recovery. For example, Siebers and McMurray (1981) tested a 200 yard swim after a 15-min interval following a 2-min standard tethered swimming exercise at intensity 90% of VO2max. The study included two experimental conditions with active recovery walking or swimming. During the 15-min interval, swimmers either walked on the pool-deck (velocity 2.5 to 3 mph) or swum at self-selected intensity (moderate pace) for 10 minutes and then rested passively for the remaining 5 min. A limitation of this study was that the intensity of exercise was not specified. No difference was observed in the 200-yard swim although swimmers were 1% faster after swimming active recovery (Siebers and McMurray 1981).
Swimming or rowing active recovery was applied during the 14-min interval between two 200 yard sprints (Felix et al., 1997). The active recovery intensity corresponded to the 65% of the 200 yard velocity and to the 60% of the maximum heart rate for rowing and performed for 10 minutes within the 14-min interval period. Swimming times of the second 200 yard sprint were similar after swimming or rowing active recovery and both were faster compared to passive recovery condition (Felix et al., 1997). Active recovery at the same relative intensity with arms or legs (30% of the VO2max) was applied in the study of Thiriet et al., (1993). Both modes of active recovery improved performance compared to passive recovery (Thiriet et al., 1993).

It seems that the mode of active recovery is not critical for the performance outcome on a subsequent bout at least when a long interval is provided and the tested exercise bout is a long duration sprint (i.e. ~120 s). A summary of studies which examined the effects of the intensity of active recovery or different modes of active recovery on performance are shown on Table 3.

The effects of active recovery duration on performance

When several experimental protocols apply active recovery between repetitions, there is a need to stop the participant for blood sampling. Thus, part of the interval between sprints is passive recovery and the remaining is active. This means that although the recovery is characterized as active, in fact, it is partially active and partially passive. The extent of this passive rest period within an active interval may affect the recovery process. In the studies of Felix et al., (1993), Siebers and McMurray (1981), Toubekis et al. (2008), during active recovery conditions, almost 1/3 of the interval was passive recovery. Only one study has examined the effects of active recovery duration on performance. Toubekis et al. (2008a) found that when a 15-min interval is provided, a 5-min active recovery was appropriate to enhance performance compared to a 10-min active and 15-min passive recovery. In the study of Del Coso et al. (2010), the different duration of active recovery of 4.5, 6 or 9 min, was designed to demand the same energy expenditure applying intensities corresponding to 24, 18 or 12% of the respiratory compensation threshold.
Despite the differences in duration and intensity of active recovery, the performance on a subsequent 4 s sprint was not different between conditions. It is likely that a combination of active and passive recovery may be beneficial between long duration sprints, and the appropriate duration of active recovery which may also depend on the intensity and duration of the tested sprint remains to be examined.

Active recovery during various types of exercise

Despite performance time, mean power, peak power and total work measured in most of the studies, there are other specific sport abilities that should be examined after active recovery compared to passive recovery. The evaluation of isometric muscle force and muscle torque during isokinetic contractions are important parameters for specific sports performance. Several studies examined the force and isokinetic muscle function after active or passive recovery. Following a 60 s maximum exercise at 150% of VO max, active recovery (cycling at 30 % of VO2max) or passive recovery had no positive or negative effect onpeak torque and total work of the dominant quatriceps during 60 repetitions (~90 s) performed at an angular velocity 150o·s-1 (Bond et al., 1991). In contrast, the maximum torque measured at an angular velocity of 60o·s-1 was increased after 15 minutes of active recovery at 30% but not after active recovery at 60% of the VO2max(McEniery et al., 1997).
The maximum voluntary contraction (MVC:isometric force) was measured after low intensity (50% of MVC) isometric contraction to fatigue and improved after a 5-min active recovery cycling at 10W (60 rpm) compared to passive recovery (Mika et al., 2007). Furthermore, the isometric hand-grip force, which may be important for climbing, was reduced during the 30 minutes after a climbing trial (Watts et al., 2000). The reduction in isometric hand-grip force was significantly greater one minute after the trial when the climbers applied recumbent cycling at 25W as active recovery compared to passive recovery (Watts et al., 2000).
Partially active recovery (5 min active plus 5 min passive) was applied during the 10-min interval separating the six competitive men’s gymnastics events (floor, pommel, rings, vault, parallel bars, horizontal bar), and this practice helped the participants to achieve higher scores compared to passive recovery (Jemni et al., 2003). The different protocols applied and the limited number of studies where the isometric muscle force or muscle torque was examined do not allow us to reach a firm conclusion concerning the
effectiveness of active recovery on muscle function. Further research is needed to examine the efficacy of active recovery under specific sport conditions. A summary of the findings concerning muscle function and specific sport activities ispresented in Table 4.

Active Recovery Following a Game or Training Session and Performance

Performance in team sports

Athletes are advised to follow a cool-down practice after a high intensity training session or after competition. The main reason for this practice is to enhance the lactate removal and recovery of homeostasis. It is believed that this will facilitate the recovery of performance before the next session. However, active recovery following a training session may not offer any advantage for performance (Barnett, 2006).

Table 3. Effects of different intensities or different types of active recovery compared to passive recovery during repeated sprints in various types of exercise

table3 Performance in team sport

table3b Performance in team sport

I: interval duration, RCT: respiratory compensation threshold, PP: peak power, MP: mean power, TW: total work, ARs: All Active Recovery conditions, PR: passive recovery, AR: active recovery, LT: lactate threshold, S-S: self-selected, NS: no significant difference, HRmax: maximum heart rate, M: male, F:female.

Table  4. Effects of active recovery following various types of athletic activities

table4 Performance in team sport

MVC: Maximum voluntary contraction (isometric), NS: no significant difference, AR: active recovery, PR: passive recovery, AT:
anaerobic threshold, M: male, F: female.

More recent studies have investigated the effectiveness of active recovery immediately after a training session on performance before the next session. Tessitore et al. (2007) and Tessitore et al. (2008) examined the effects of different modes of 20 min active and passive recovery following a soccer training session and following futsal soccer games on performance 5 hours later. It was found that performance on several anaerobic tests such as the squat-jump, the countermovement jump, bounce-jump and 10 m sprint time were not affected by the mode of recovery, which included dry-land or water-based active recovery, electrostimulation, or passive rest (Tessitore et al., 2007, 2008). It is likely that the training stimulus was moderate and the recovery process of these athletes following training or competition was well-designed (players followed proper hydration and nutrition) and these may have masked any effect of the recovery interventions.
A study applied with international level female soccer players extended the performance testing 69 hours following a friendly game between national teams (Andersson et al., 2008). Active recovery was applied 22 and 46 hours following the match and included 60 minutes of low intensity cycling and low intensity resistance training (60% of HRmax; <50%1RM). Performance during a 20-m sprint, countermovement jump and isokinetic strength were not different following either active or passive recovery (Andersson et al., 2008).
Similar results were obtained by King and Duffield (2009) in female netball players after a session including various sport specific activities. Fifteen minutes of active recovery at an intensity of 40% of the velocity at VO2max (vVO2max) or passive recovery showed similar effects on performance during five vertical jumps height and five 20-m sprints time both tested before a second session 24-hours later (King and Duffield 2009). The total stress imposed to the athletes during these non-controlled game-sport conditions is high enough to cause fatigue. Probably the active recovery applied after training session or a match is not appropriate to enhance performance recovery of selected tests in well-trained players. However, the effect of active recovery on the next training session on the overall game performance has not so far examined.

Performance in individual sports

During a laboratory setting, it is possible to control the load applied on the subjects. A controlled high intensity cycling protocol was applied by Lane and Wenger (2004) to examine the effects of several types of recovery on performance 24 hours later. Ten active males performed a series of 22 sprints ranging in duration from 5 to 15 s all applied with a work to rest interval 1:5.

Following this high intensity session, the participants followed a 15-min massage, cold water immersion, active recovery at an intensity of 30% of VO2max and passive recovery on four experimental conditions. Performance measured in the same 22 sprints 24 hours later was maintained in all recovery conditions (massage, cold water immersion, active recover) but was reduced after passive recovery (Lane and Wenger 2004).

figure5 Performance in individual sport

Figure 5. Blood lactate changes (panel A) during the training session followed either by passive or active recovery. Changes in stroke length (panel B) and percentage changes in stroke length (panel C) the days before (DAY 1) and the day after (DAY 3) the training session. * indicate p<0.05 between ACT and PAS conditions, # indicate differences between DAY 1 and DAY 3. (Data from Tsami et al., 2006; Reproduced with permission)

Table  5. The training content followed during the study of Tsami et al., (2006)

table5 Performance in individual sport

Table 6. The effects of active recovery applied after a training session or competition on performance during the following session or the following day

table6 effects of active recovery applied after a training session

table6b effects of active recovery applied after a training session

MP: mean power, CMJ: countermovement jump, VJ: vertical jump, SJ: squat jump, BJ: bounch jump, SL: stroke length, F: female, M: male, AR: active recovery, PR: passive recovery, NS: no significant difference after active or passive recvery.

In addition to cycling, swimming training intensity can be precisely controlled in the field (swimming pool). The effects of active or passive recovery were studied after a high intensity training session in young swimmers (Tsami et al., 2006). The swimmers completed a training session including high intensity aerobic and anaerobic contents (see Table  5). The day before training and the day after training, swimmers performed a 50-m maximal and a 400-m sumbaximal (85% of the best time) test for the evaluation of metabolic and temporal parameters (stroke rate and stroke length). Fifteen minutes of active recovery at a pace corresponding to 60% of the 100-m velocity were applied immediately after the training session and helped to maintain a higher stroke length compared to passive recovery on the 400-m sub-maximal test but had no effects on the maximum intensity 50-m sprint time the day after training (Figure 5; Tsami et al., 2006). The results from studies in individual sports are not conclusive but support the use of a 15-min low intensity active recovery following a training session. A summary of studies using active recovery after a training session or competition are shown in Table 6.


Active recovery compared to passive recovery is strongly associated with greater metabolic demands, and this has an impact on performance. Active recovery should be used by athletes between sprint repetitions with a duration-time-period of 40 to 120 s to enhance the lactate removal and possibly result in a faster restoration of muscle pH. The application of this practice at an intensity below or at the lactate threshold (i.e., exercise that will not add more lactate to the circulation) may maintain performance and in some cases, when only two sprint bouts are performed, it may help to enhance performance. When a long duration-interval-period is available between sprints (i.e., 15 to 20 min), the application of active recovery for the 1/3 of that period, while leaving some time for passive recovery, may be beneficial. Under these conditions, the faster pH restoration, increased activation and contribution of aerobic metabolism and adequate PCr resynthesis may be beneficial to performance during training and competition.
Active recovery should not be used, when a short interval (i.e., 20 to 120 s) is provided, between sprints with a duration-time-period of 4 to 15 s. This practice will increase the energy cost because of the oxygen required for exercise, thus preventing the muscle re-oxygenation leading to inadequate PCr resynthesis and decreased performance. However, during team-sport games it is not practical to advise players to stand passively after a sprint. The game demands, in many cases, require slow intensity running between sprints. Thus, active recovery between sprints should become a routine training practice.
When a long duration-interval-period (i.e., more than 3 to 4 min) is available between sprints of 15 to 30 s, a very low intensity active recovery may maintain performance similar to that after passive recovery.
There is no adequate evidence to suggest that active recovery applied following a training session is beneficial in team sports. However, in individual sports and when high intensity training has been applied, it is likely that active recovery may benefit the performance outcome during the next training session. Clearly, this cannot be attributed to lactate or other currently known metabolic factors.


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