How the menstrual cycle affects strength training
Hormone levels through the cycle don't change randomly — they follow a fairly predictable pattern that directly affects training. During the follicular phase (the first half, after your period), rising estrogen is linked to better neuromuscular efficiency, load tolerance, and even faster recovery — many athletes report personal bests in strength during this window.
In the second half, the luteal phase, rising progesterone comes with a small rise in body temperature for some, a bit more fatigue, and slower recovery between sets and sessions for many people. It's not a universal rule, but it's a well-documented tendency backed by a number of studies.
Practical takeaway: scheduling your heaviest sessions and PR attempts around the follicular phase, and slightly easing intensity or volume during the luteal phase, can make training noticeably more comfortable without hurting long-term progress.