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.

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 them stay explosive while recovering.

Middle-aged guys who don't work out much feel more sore after a tough squat session than those who are used to training — and that soreness lasts longer. This suggests staying active might help reduce muscle soreness as you age.

Even if middle-aged guys have been lifting weights for years, their muscles recover just as slowly after a tough workout as guys who don’t train—so being trained doesn’t seem to protect against muscle soreness or damage.

After a tough squat workout, both younger and middle-aged guys who regularly lift weights show similar drops in their ability to fully activate their leg muscles — and that drop lasts for at least a few days. This suggests that brain-to-muscle fatigue from hard workouts doesn’t get worse with age if you stay in shape.

If you lift weights until you can't do another rep during squats, you'll feel more tired and jump lower afterward than if you stopped before reaching failure—even if you did the same total amount of lifting. This drop in performance can last up to half an hour.