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Performance Adaptations to Sprint, Endurance and Both Modes of Training.

Callister Robin; Shealy, Marilyn J.; Fleck, Steven J.; Dudley, Gary A.
Journal of Strength & Conditioning Research: August 1988
Article: PDF Only

Sprint (S, n=12) and endurance (E, n=14) training were performed independently and concurrently (C, n=6) for eight weeks to determine adaptive responses to each and their capability. Group S trained three days per week performing six 100m and six 50m sprints at 95 percent maximum speed. Group E ran continuously for 30 minutes at 85 percent HRmax three days per week. Group C trained six days per week, alternating days of sprint and endurance training. Group S improved (p<0.05) 50m and 100m sprint times (2.5 and 4.5 percent, respectively), 30-second run distance (2.5 percent), showed no change (p>0 .05) in 30-minute run distance or [latin capital V with dot above]O2 max, and decreased (p<0.05) average power output 20.9 percent during the 30- to 45-second interval of a 60-second continuous jump test (CJT) Group E improved (p<0.05) 30-minute run distance (12.6 percent), [latin capital V with dot above]O2, max (5.9 percent), and sprint performance (2.2 percent in 50m, 2.5 percent in 100m), but showed no change (p>0.05) in 30-second run distance. Group C showed (p<0.05) improvements of similar magnitude to group E in [latin capital V with dot above]O2, max (7.5 percent) and 30-minute run distance 9.9 percent), and to Group S in 50m (2.4 percent) and l00m (3.5 percent) times and 30-second run distance (3.5 percent). All groups decreased (p<0.05) average power output during the 45- to 60-second interval of the GO-second CJT. Our result sug gest that optimum improvements in performance are specific to the mode of training (sprint or endurance) and are independent of concurrent performance of both modes of exercise.

(C) 1988 National Strength and Conditioning Association