| EFFECTS
OF ACTIVE VERSUS PASSIVE RECOVERY ON POWER OUTPUT DURING REPEATED
BOUTS OF SHORT TERM, HIGH INTENSITY EXERCISE
|
Declan A.J. Connolly ,
FACSM, Kevin M. Brennan and Christie D. Lauzon
|
Human Performance Laboratory, Room 212, Patrick Gymnasium, University of
Vermont Burlington, USA
| Received |
|
07 November 2002 |
| Accepted |
|
16
February 2003 |
| Published |
|
01 June 2003 |
©
Journal of Sports Science and Medicine (2003) 2, 47- 51
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ATP repletion following exhaustive exercise is approximated to be 90-95%
complete in 3 minutes, and is crucial in the performance of short duration,
high intensity work. Few studies appear to have used this 3-minute interval
in the investigation of recovery modes, blood lactate accumulation and power
output. Thus, our aim was to investigate changes in peak power (PP), average
power (AP) and blood lactate during repeated bouts of high intensity, short
duration cycling, comprising active and passive recovery modes lasting 3
minutes. Seven male cyclists (age 21.8±3.3 yrs, mass 73.0±3.8kgs, height
177.3±3.4cm) performed both an active (3 min at 80rpm & 1kg resistance)
and a passive recovery (no work between bouts) protocol. Following a warm-up,
subjects performed six 15-second maximal sprints against a fixed workload
of 5.5kg. Mean PP across the six trials was 775±11.2Watts (W) and 772±33.4W
for active and passive protocols respectively; whereas mean AP was 671±26.4W
and 664±10.0W, respectively. Neither was significantly different. There
was a significant difference within trials for both peak power and average
power (p<0.05), with both values decreasing over time. However, the decrease
was significantly smaller for both PP and AP values during the active recovery
protocol (p<0.05). In the current study, variation in power output cannot
be explained by lactate values, as values did not differ between the active
and passive protocol (p=0.37). Lactate values did differ significantly between
trials within protocols (p<0.05). The results of this study suggest that
an active recovery of 3 minutes between high intensity, short duration exercise
bouts significantly increases PP and AP compared to a passive recovery,
irrespective of changes in blood lactate levels.
KEY WORDS:
Anaerobic power, light exercise, lactate, power output.
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