Cardio workouts are great for toning your thighs, but they won't really cause your thighs to become larger.
Because cardiovascular activity doesn't build muscle. Muscle hypertrophy grows muscles by ripping and repairing muscle fibers.
If you want to gain muscle mass, you should devote most of your workout time to strength training exercises like squats and lunges.
Cardiovascular activity, on the other hand, may help you lose fat and make your thighs seem more defined.
Thigh definition and shape may be improved by performing solitary leg workouts with weights.
Increasing the amount of blood that flows to the muscles through activities like cardio can help with recuperation and development.
Additionally, if you have any excess fat on your thighs, doing exercise can help you burn it off, which will make your thighs appear more defined.
The best way to get the advantages of your workout is to incorporate diverse forms of exercise, such as cardio and strength training.