If adults do guided strength training for over 10 weeks, they might gain around 3 kilograms of muscle and get 25% stronger — and this could help balance out muscle loss from weight-loss drugs.

If you do supervised strength training for over 10 weeks while losing weight, you can gain about 3 kg of muscle and get 25% stronger — and it’s the best way to keep or build muscle compared to other types of exercise.

If healthy guys between 18 and 40 lift weights regularly for at least two weeks up to a year, they typically gain about 1.5 kilograms of muscle—no matter what kind of weight routine they follow.

Working out with weights twice a week for four months can help middle-aged Japanese women build a little more muscle, even as they get older.

Doing strength exercises like lifting weights while losing weight helps keep your muscles and bones strong, unlike just walking or cycling, which can make you lose more muscle and bone.

If you take a one-week break from lifting weights halfway through a 9-week workout plan, you might lose a little bit of your strength gains in your legs, but your muscles won’t shrink any more than if you kept going, and your endurance and power won’t be affected.