Exercise & Fitness

Timing Workouts to Your Menstrual Cycle Offers No Extra Muscle Gains

A growing trend encourages women to schedule harder workouts during the follicular phase and lighter sessions during the luteal phase. Researchers at McMaster University directly tested this idea in a randomized controlled trial. Twenty-four eumenorrheic women trained one leg with high volume in the follicular phase and the other with high volume in the luteal phase across three consecutive menstrual cycles. All exercise conditions produced significant gains in thigh lean mass, muscle cross-sectional area, and one-rep max strength compared to a non-exercising control leg. Critically, no measurable differences existed between any of the three training arrangements. Total training volume, not cycle timing, best predicted adaptation. Women can train according to personal preference and schedule without sacrificing results.