Alex Silver-Fagan, a Nike trainer, believes that to get your legs and buttocks in good shape, you need to squat. These exercises can be easily combined with others or done by yourself. They are simple, can be done at home, and take no more than 15 minutes.

Basic squat:

8 Exercises to Tighten Your Butt and Legs in No Time

Start with basic squats. Keep your feet flat on the ground.

Kick back squats:

8 Exercises to Tighten Your Butt and Legs in No Time

Kickbacks will put your glutes to work.

Sumo squats:

8 Exercises to Tighten Your Butt and Legs in No Time

These squats strengthen the torso and buttocks.

Reaching sumo squat:

8 Exercises to Tighten Your Butt and Legs in No Time

This adds some cardio.

Oblique squat:

8 Exercises to Tighten Your Butt and Legs in No Time

Your waist will thank you.

Jump Squat:

8 Exercises to Tighten Your Butt and Legs in No Time

This exercise is also good for the arms.

Narrow squat:

8 Exercises to Tighten Your Butt and Legs in No Time

A warm-up for the pistol squat.

Pistol squat:

8 Exercises to Tighten Your Butt and Legs in No Time

A difficult exercise with a lot of work on the knees. Do this carefully and don’t squat too much. At first, you may also want to hold onto something.