Resistance training by the numbers

How much weight, how many reps and sets, and how often? Here's what new guidelines suggest.

Old-fashioned resistance training — lifting heavy weights multiple times — is the best way for men to slow and even reverse age-related muscle loss, known as sarcopenia. It can also increase your strength, protect against falls, and help you live a more independent life.

Resistance training (also known as strength training) consists of doing upper- and lower-body exercises using free weights (like dumbbells, kettlebells, or barbells), weight machines, resistance bands, or just your own body weight.