2019-02-01, 09:50
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#1
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Chefsarkitekt Oljebyxor
Reg.datum: Mar 2002
Ort: Norrtälje
Inlägg: 78 283
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Effekt av olika doser av koffein på prestation inom hopp och kast
Citat:
PURPOSE::
To examine the acute effects of three doses of caffeine on upper- and lower-body ballistic exercise performance, and to explore if habitual caffeine intake impacts the acute effects of caffeine ingestion on ballistic exercise performance.
METHODS::
Twenty recreationally active male participants completed medicine ball throw and vertical jump tests under four experimental conditions (placebo, 2, 4, and 6 mg·kg-1 of caffeine).
RESULTS::
One-way repeated measures ANOVA with subsequent post hoc analyses indicated that performance in the medicine ball throw test improved, compared to placebo, only with a 6 mg·kg-1 dose of caffeine (P=0.032). Effect size, calculated as the mean difference between the two measurements divided by the pooled standard deviation, amounted to 0.29 (+3.7%). For the vertical jump test, all three caffeine doses were effective (compared to placebo) for acute increases in performance (P values ranged from 0.022 to 0.044; effect sizes from 0.35 to 0.42; percent changes from +3.7% to +4.1%). A two-way repeated measures ANOVA indicated that there was no significant group x condition interaction effect, suggesting comparable responses between low (≤100 mg·day-1) and moderate-to-high (>100 mg·day-1) caffeine users to the experimental conditions.
CONCLUSIONS::
Caffeine doses of 2, 4, and 6 mg·kg-1 seem to be effective for acute enhancements in lower-body ballistic exercise performance in recreationally trained male individuals. For the upper-body ballistic exercise performance, only a caffeine dose of 6 mg·kg-1 seems to be effective. The acute effects of caffeine ingestion do not seem to be impacted by habitual caffeine intake; however, this requires further exploration.
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Int J Sports Physiol Perform. 2019 Jan 31:1-25. The Effects of Three Different Doses of Caffeine on Jumping and Throwing Performance: A Randomized, Double-Blind, Crossover Study.
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