If you mix up your workouts for the same muscle, you’ll grow that muscle more evenly than if you always do the same exercise.

If young guys who haven’t worked out in a while switch up their strength exercises for the same muscles, they’ll likely build muscle more evenly across their thighs and arms over nine weeks compared to doing the same moves every time.

If you mix up your strength workouts for the same muscle, it might help it grow more evenly from top to bottom, especially if you haven’t been training for a while.

Some people think mixing up your leg workouts (like changing weights or angles) might make all parts of your quadriceps grow better than doing the same routine over and over—but right now, science hasn’t proven this for sure.

Different parts of your body don't grow muscle at the same rate when you lift weights. Because your upper and lower body respond differently to workouts, you might need to adjust how much you train each muscle group to get the best results.

When training volume and intensity are the same, lifting weights with greater resistance at longer muscle lengths results in the same amount of muscle growth as lifting with greater resistance at shorter muscle lengths.