Female individuals face a more complicated algorithm for success. (relevantmagazine.com)
Although aggression among primates is frequent, lethal attacks are very rare, especially among female individuals. (sciencedaily.com)
Furthermore, when considering several studies, the lumbar erector spine at the region L3 — L4 appears to display 64 — 73 % type I muscle fibers in males, and between 63 — 70 % type I muscle fibers in female individuals (Mannion et al. 1997; 2000; Sirca et al. 1985; Crossman et al. 2004; Jorgensen et al. 1993). (strengthandconditioningresearch.com)