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Heart rate at rest and during the exercise sessions. DESC = decaffeinated (108 mg of caffeine); CAF-1: one dose of 150 ml of coffee (144 mg of caffeine); CAF-2: two doses of 150 ml of coffee (2×144 mg of caffeine); CAF-3: three doses of 150 ml of coffee (3×144 ml of caffeine). Data are mean ± standard error. There are no significant differences between experimental sessions (Repeated measures ANOVA).
