What is the best exercise to make your thighs firmer?

If you want to make your thighs firm means you have to run a lot and if you are running daily means you will have a firm thigh and you will have a lot of stamina in your body. And also you can take some rest after your running and you can do some free squat so that you can grow your thigh muscle. If you are a person who use to go to the gym means you can do some heavy workout with the advice of the trainer. You can put some weight on your legs and then you can do some squat so that your thigh will be firm. And if you are working out one day hard means you have to leave some gap so that your muscle can recover.

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