Information de reference pour ce titreAccession Number: | 00005768-200608000-00018.
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Author: | SPENCER, MATT 1,2; BISHOP, DAVID 1; DAWSON, BRIAN 1; GOODMAN, CARMEL 1; DUFFIELD, ROB 1
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Institution: | (1)Team Sport Research Group, School of Human Movement and Exercise Science, The University of Western Australia, Crawley, AUSTRALIA; and (2)Department of Physiology, Australian Institute of Sport, Belconnen, AUSTRALIA
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Title: | |
Source: | Medicine & Science in Sports & Exercise. 38(8):1492-1499, August 2006.
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Abstract: | Purpose: To compare active versus passive recovery on performance and metabolism during a test of repeated-sprint ability.
Methods: Nine males performed four repeated-sprint cycle tests (six 4-s sprints, every 25 s) in a randomized, counterbalanced order: two tests with active recovery (~32% VO2max) and two with passive recovery. Muscle biopsies were taken during the four tests from the vastus lateralis pretest, immediately posttest, and following 21 s of recovery to determine phosphocreatine ([PCr]), creatine, and muscle lactate concentration ([MLa-]).
Results: Active recovery resulted in a greater power decrement than passive recovery (7.4 +/- 2.2 vs 5.6 +/- 1.8%, P = 0.01) and lower final peak power (14.9 +/- 1.5 vs 15.3 +/- 1.5 W[middle dot]kg-1, P = 0.02). However, there was no significant difference in work decrement or total work. The percent of resting [PCr] was lower and approached significance posttest (32.6 +/- 10.6 vs 45.3 +/- 18.6%; P = 0.06; effect size (ES) = 0.8) and following 21 s of recovery (54.6 +/- 9.6 vs 71.7 +/- 14.1%; P = 0.06; ES = 1.2) during active recovery. The [MLa-] was significantly higher posttest during active recovery (71.7 +/- 12.3 vs 55.2 +/- 15.7 mmol[middle dot]kg-1 dm; P = 0.048; ES = 1.2); however, no significant differences were evident following 21 s of recovery (55.0 +/- 11.3 vs 48.4 +/- 16.7 mmol[middle dot]kg-1 dm, P = 0.07; ES = 0.5).
Conclusions: Despite no differences in the majority of performance measures, active recovery resulted in a significantly lower final peak power, a greater peak power decrement, a higher [MLa-], and a strong trend towards lower [PCr], suggesting a potential suboptimal effect of active recovery during repeated-sprint exercise.
(C)2006The American College of Sports Medicine
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Author Keywords: | PHOSPHOCREATINE; LACTATE; PEAK POWER OUTPUT; INTERMITTENT EXERCISE.
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Language: | English.
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Document Type: | APPLIED SCIENCES: Physical Fitness and Performance.
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Journal Subset: | Clinical Medicine.
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ISSN: | 0195-9131
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NLM Journal Code: | 8005433, mg8
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DOI Number: | https://dx.doi.org/10.1249/01.ms...- ouverture dans une nouvelle fenêtre
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