Hubungan Antara Konsumsi Kopi Dengan Penurunan Muscle Fatigue Pada Latihan Gym Intensitas Sedang Hingga Tinggi Di Rest Gym Medan Tuntungan

Abstract

Background: Muscle fatigue is a decline in the muscle’s ability to generate force after moderate to high-intensity physical activity. One strategy believed to delay muscle fatigue is coffee consumption, as caffeine acts as a central nervous system stimulant with ergogenic effects. This study aimed to analyze the relationship between coffee consumption and reduced muscle fatigue among individuals performing moderate to high-intensity gym workouts at Rest Gym Medan Tuntungan. Objective: To determine the effect of coffee consumption on muscle strength and endurance during moderate to high-intensity gym exercises. Methods: This research used a true experimental design with a pretest–posttest control group design. Thirty respondents were randomly divided into two groups: a treatment group that received robusta coffee (3.25 g dissolved in 150 ml of water, approximately 78 mg of caffeine) and a control group that received mineral water. Both groups underwent muscle strength testing using the 1 Repetition Maximum (1RM) bench press and muscle endurance testing using the Lat Pulldown exercise assessed with the Borg CR10 scale. Data were analyzed using the non-parametric Mann–Whitney U test. Result: The results showed significant differences between the coffee and control groups in both muscle strength (Asymp. Sig.=0.000) and muscle endurance (Asymp. Sig.=0.015). Conclusion: Coffee consumption significantly improves muscle strength and endurance, effectively reducing muscle fatigue during moderate to high-intensity gym training. Keywords: Coffee, Caffeine, Muscle fatigue, Ergogenic, Gym Training