If middle-aged guys have been doing strength training, they don’t lose as much power when squatting after a tough workout compared to guys who haven’t trained — meaning regular lifting might help...

Middle-aged guys who lift weights don't bounce back as quickly after a tough leg workout as younger guys do — they're weaker and less powerful for a few days, even if they're just as trained.

For men who already lift weights, doing either high-intensity or high-volume workouts for 8 weeks didn't make a big difference in leg strength or muscle size.

Even if you’re already strong—squatting almost twice your body weight—adding more sets will make you stronger, but won’t make your muscles grow more than doing a moderate amount.

Among men who regularly lift weights, those who kept their usual number of sets improved their maximum squat strength more than those who added 30% or 60% more sets, suggesting that increasing training volume beyond a certain point may reduce gains in maximal strength.

Even people in their 50s and 70s can get much stronger and activate their muscles better after 12 weeks of heavy weight training — age doesn’t stop them from improving.