Scott Keatley MPPD | RD | CDN | FAND
Where Metabolism Meets Momentum.
Popular Pre-Workout Supplements Could Be Wrecking Your Sleep
SELF · March 17, 2026
Caffeine’s long and highly variable half-life makes timing just as important as dose. A pre-workout that improves an evening session can still undermine recovery if it delays sleep, so the right choice depends on training time, total caffeine intake, and individual sensitivity.