The 4-Hour Body: An Uncommon Guide to Rapid Fat-Loss, Incredible Sex, and Becoming Superhuman

by Timothy Ferriss

Muscle strength and short-term power output peak in the early evening (4:00–6:00 P.M.), which coincides with daily maximum body temperature.15 Pain tolerance, at least for arthritis and fibromyalgia, is also highest between 4:00 and 5:00 P.M.