What it means
The US activity guidelines recommend muscle-strengthening activity that works all major muscle groups on 2 or more days a week, on top of aerobic activity. Squats, push-ups, rows, lunges, presses and carrying heavy objects all count.
During weight loss, resistance training is one of the best-supported ways to hold on to lean mass. Combined with enough protein, it helps make sure more of the weight lost comes from fat.
It also supports bone density, balance, blood sugar control and everyday function, which matters more with age.
Beginners can start with one or two sets of 8 to 15 reps for a handful of exercises, using a weight that feels challenging by the last few reps. Good form comes before heavier loads. On a GLP-1, eat something with protein beforehand if low energy or dizziness has been an issue, and stay hydrated.
Why it matters
Strength training is the main habit that helps protect muscle while a GLP-1 drives fast weight loss.