Lifting heavy won’t only add size and strength, it will also rev up your metabolism and may even boost your sex life. Big lifts increase the production of the muscle-making, libido-boosting androgen hormone and improve its flow through the body.
A man’s strength hits its hormonal peak between 5 and 7pm, according to research from the journal Chronobiology International. So if you want to hit heavier loads, try saving your big lifts for evening sessions.