How do you flex your foot?

1. Sit up straight with your feet flat on the floor. Your knees should be bent at a 90-degree angle and your feet should be hip-width apart.

2. Curl your toes under so that they touch the floor. Keep your heels on the ground.

3. Hold the position for 10 seconds, then relax.

4. Repeat steps 2 and 3 for 10 repetitions.

5. To increase the intensity of the exercise, you can add a weight to your foot. To do this, place a small dumbbell or ankle weight on top of your foot while you are curling your toes.

6. Be sure to stop the exercise if you feel any pain.