title: Effects of previous dynamic arm exercise on power output during repeated maximal sprint cycling.
abstract: This study examined the effects of elevating blood lactate concentration by arm exercise on subsequent performance during repeated 30 s sprints with the legs. Eight male students performed two 30 s cycle ergometer sprints separated by 6 min of recovery, on two occasions. On one occasion the subjects performed only the two 30 s cycle ergometer sprints ('legs'), while on the other occasion 5 min of heavy arm cranking preceded the two sprints ('arms and legs'). Blood lactate concentration was determined from capillary samples at rest, after a standardized warm-up and 3 and 5 min following each exercise bout. In the 'legs' condition, the peak power output (PPO) and mean power output (MPO) in the second sprint were 92% (P < 0.05) and 85% (P < 0.01) of the values attained during the first sprint, respectively. Prior arm exercise, which increased blood lactate to 11.0 +/- 0.6 mM, had no effect on PPO and MPO during the first cycle ergometer sprint (approximately 4% drop, N.S.). However, in the second sprint after prior arm exercise, PPO was 10% lower than the PPO attained during the corresponding sprint in the 'legs' condition (sprint 2 'arms and legs' 963 +/- 42 W, sprint 2 'legs' 1074 +/- 60 W, P < 0.05), while MPO was better maintained (sprint 2 'arms and legs' 517 +/- 17 W, sprint 2 'legs' 549 +/- 24 W, N.S.). The rate of blood lactate accumulation after both cycle ergometer sprints was considerably decreased (by approximately 50%) when blood lactate levels were pre-elevated by arm crank exercise.(ABSTRACT TRUNCATED AT 250 WORDS)
authors.affiliation: Department of Physical Education, Loughborough University of Technology, UK.
authors.forename: G C
authors.initials: GC
authors.lastname: Bogdanis
authors.forename: M E
authors.initials: ME
authors.lastname: Nevill
authors.forename: H K
authors.initials: HK
authors.lastname: Lakomy
mesh_terms: D000328:Adult; D001132:Arm / Q000502:physiology*; D001642:Bicycling / Q000502:physiology*; D001824:Body Constitution; D016552:Ergometry; D005080:Exercise Test; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D007773:Lactates / Q000097:blood; D007866:Leg / Q000502:physiology*; D008297:Male; D009119:Muscle Contraction / Q000502:physiology*; D018763:Muscle Fatigue / Q000502:physiology; D009126:Muscle Relaxation / Q000502:physiology; D005082:Physical Exertion / Q000502:physiology*
chemical_list: D007773:Lactates