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- W4387054082 abstract "Coffee has been reported to improve aerobic exercise performance, but its effects on anaerobic performance are not well studied. Roasting affects coffee chemistry, both destroying and creating compounds that impact flavor and may also affect exercise performance. PURPOSE: This double-blind crossover study investigated the impact of coffee roast level on grip strength and countermovement jump (CMJ) height in human test subjects. METHODS: Baseline performance was assessed in ten subjects using a digital hand dynamometer for grip strength and a force plate for CMJ. Subjects then repeated each test on five separate days after green coffee, light, medium, and dark roast coffee (brewed at 55 g ground coffee per liter of water), and water control treatments were consumed thirty minutes before each trial. RESULTS: Coffee samples were tested for caffeine and chlorogenic acid (3CQA) content. Caffeine results were: green 68.54 ± 0.15 mg, light 91.58 ± 0.26 mg, medium 87.96 ± 0.40 mg, dark roast 78.90 ± 0.27 mg. 3CQA results were: green 114.70 ± 1.40 mg, light 113.65 ± 0.05 mg, medium 81.18 ± 0.65 mg, dark roast 19.31 ± 0.05 mg. Grip strength results were: baseline 42.81 ± 12.24 kg, control 43.06 ± 11.14 kg, green coffee 43.39 ± 10.61 kg, light roast 43.13 ± 10.46 kg, medium roast 43.11 ± 10.32 kg, and dark roast 44.25 ± 12.00 kg. CMJ height results were: baseline 20.73 ± 8.12 cm, control 22.33 ± 8.71 cm, green coffee 18.60 ± 8.51 cm, light roast 21.84 ± 10.20 cm, medium roast 21.98 ± 9.85 cm, and dark roast 19.20 ± 7.80 cm. While average grip strength values were numerically higher in coffee-treated subjects than for baseline, a one-way ANOVA determined there were no significant (p < 0.05) differences among treatment groups for grip strength or CMJ height. CONCLUSIONS: This study did not yield enough evidence to corroborate coffee consumption or roast level having a significant impacts on anaerobic performance. Future studies should include more participants and more measures to determine if preexercise coffee intake impacts anaerobic performance." @default.
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- W4387054082 date "2023-09-01" @default.
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- W4387054082 title "Effects Of Green, Light, Medium, And Dark Roast Coffees On Grip Strength And Jump Height" @default.
- W4387054082 doi "https://doi.org/10.1249/01.mss.0000987040.48396.c3" @default.
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