Genetic Blueprint or Just Bad Coffee? New Study Reveals Why Caffeine Works Wonders for Some Gym-Goers—and Does Nothing for Others
August 17, 2026 By MindBodyGreen Fitness & Health Desk Main Facts Have you ever downed a pre-workout energy drink or a double-shot espresso, expecting to shatter your personal records, only to feel entirely underwhelmed? Meanwhile, the gym partner next to you is buzzing with relentless energy, effortlessly repping out heavy sets. According to a landmark…
