Best Rep Range for Muscle After 60: Heavy or Light Weights?

I hear some version of this question a lot: “I’m 62. Should I use light weights for higher reps or lift heavy for fewer reps?”

My answer is both.

That doesn’t mean every set needs to be heavy, or that you need to test your one-rep max. It means you can train for different goals with different loads. If you’re over 60, that balance can help you build muscle while keeping strength and power in the picture.

Muscle Growth Doesn’t Belong to One Rep Range

For building muscle, the load matters less than many people think. Research suggests that a range of loads can produce similar muscle growth when sets are challenging enough. In practice, that means a lighter weight can work, but you’ll generally need to do more reps and bring the set close to failure—the point when you can’t complete another rep with good form. 

Heavier loads have a different advantage: They’re particularly useful for building strength. A 2023 review of resistance-training research found that higher-load programs tended to maximize strength gains, while a range of training prescriptions supported muscle growth.

Bottom line: You don’t have to choose one camp. You can use moderate or lighter weights for challenging sets and include some heavier work when it feels appropriate and your technique stays solid.

Choose Loads Your Joints Can Handle

There’s a practical reason I don’t tell every older lifter to go heavy all the time: Heavy weights can feel rough on joints, especially when you push low-rep

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