For men who lift weights regularly, the body's testosterone reaction after workouts was about the same whether they did short, intense sessions or longer, higher-volume ones, and this didn't really...

One workout, whether heavy or high-rep, doesn’t change your testosterone levels in the hours after.

During a tough leg workout, testosterone levels spike temporarily, but they go back to normal by the next day and don’t stay high.

Even after a super hard workout, the body’s baseline testosterone level doesn’t stay high the next day — it goes back to normal quickly.

Even if you lift heavy or light weights for 12 weeks, your body’s short-term hormone spike after each workout doesn’t change—and that means those hormone surges probably aren’t why your muscles get bigger or stronger over time.

When you lift weights and rest only 1 minute between sets, your body releases more stress and sex hormones right after the workout — but only at the very start; after a few weeks, this effect goes away.