McNulty et al. 2020, menstrual cycle and exercise performance meta-analysis

Systematic review and meta-analysis of 78 studies on menstrual cycle phase and exercise performance. Performance was on average trivially lower in the early follicular phase than other phases, but the effect was small and heterogeneity high, with most studies rated low or very low quality (8% high, 24% medium, 42% low, 26% very low). Moderate as a meta-analysis, but it grades the underlying evidence as weak.