If women who already work out increase their leg training gradually over 12 weeks, they might build more muscle in their quads than if they stick to the same number of sets the whole time—especially if they add four sets every two weeks.

If women who already lift weights increase their workout volume every couple of weeks, they’ll get stronger on the leg press faster than if they stick to the same number of sets the whole time.

Doing a lot more leg workouts—over 50 sets a week—doesn’t make your thigh muscles grow bigger than doing 20–40 sets a week, even if you train for 12 weeks.

If you're already experienced with weight training, doing 5 to 10 sets per muscle group each week builds just as much muscle and strength as doing 15 to 20 sets—so going over 10 sets won't give you extra gains.

Even if you do a lot of leg workouts, your thigh muscles grow about the same amount whether you do 20 or 50 sets a week—just doing any consistent training makes them bigger.

For women who already lift weights, slowly increasing how many sets they do every couple of weeks doesn’t help them build thicker thigh muscles any more than just keeping their workout the same over 12 weeks.