What changes across your cycle

Luteal phase thermoregulation: Core temperature rises 0.3–0.7°C after ovulation due to progesterone. This measurably reduces heat tolerance. In hot conditions, you may need more fluids and may fatigue sooner. Practical adjustment, not a reason to stop.

Sleep quality: Polysomnography data shows sleep efficiency is ~90% in the follicular phase but drops to ~83–84% during menses and the luteal phase. Recovery may genuinely require more attention in the second half of your cycle.

ACL/knee injury risk: Knee laxity is significantly higher around ovulation when estrogen peaks. If you do high-impact, cutting, or pivoting activities, slightly increased warm-up and proprioceptive awareness around mid-cycle is reasonable — not avoidance, just awareness.