So, if you want to experience a noticeable difference in slowing down the biological clock, it seems that even moderate level of exercising isn't enough. (fitnessandpower.com)
In December while hanging with friends in Hong Kong, I got turned onto Sprint 8, a system for high intensity interval training (HIIT) that's super efficient with eight rounds of burst training interspersed with recovery at your usual moderate level of exercise. (saragottfriedmd.com)
Herding Dogs — Herding dogs are bred to work at moderate levels of exercise from sun up to sun down. (professorshouse.com)