Pre‑workout sleep risk
A new study flagged that pre‑workout supplements can halve sleep duration in young users, raising red flags for recovery and performance timing (sentinelassam.com).
The paper appears in Sleep Epidemiology (DOI 10.1016/j.sleepe.2025.100124) as reported in the University of Toronto press materials and press coverage. (ScienceDaily — ) Researchers analyzed Wave 2 of the Canadian Study of Adolescent Behaviors, a sample of 912 participants aged 16–30. (Medscape — ) The strongest association was with the most extreme short‑sleep category: users were 2.53 times more likely to report sleeping five hours or less per night (reference: relative risk ratio 2.53, comparing ≤5 hours to 8 hours). (Medscape — ) About 22.2% of the sample reported using pre‑workout drinks or powders in the prior 12 months. (Medscape — ) The authors point to product stimulant loads, noting common caffeine amounts ranging from roughly 90 mg to over 350 mg per serving and citing popular brands such as Bang!, Jack3D and C4 in their discussion. (ScienceDaily — ) Analyses used multinomial logistic regression and adjusted for age, gender, race/ethnicity, education, PHQ‑9 and GAD‑7 scores and recent weight training. (Medscape — ) Sleep was self‑reported as average hours per night over the past two weeks and the study is cross‑sectional, which the authors say limits causal claims and supports clinician discussion of supplement timing and use with young patients. (SciTechDaily — )
