Effects of Theacrine Supplementation on Heart Rate Variability Following a Resistance Exercise Session: A Randomized, Double-Blind, Placebo-Controlled Crossover Pilot Study
Background/Objectives: Resistance exercise (RE) reduces heart rate variability (HRV) in healthy young individuals, reflecting increased cardiovascular demand and autonomic stress during recovery. Given that theacrine (TEA) acts on the central nervous system and may influence autonomic cardiovascular regulation, its eff...