Pistol Squat

Step 1. - Stand with feet hip-width apart, toes pointed forward, and chest tall.

Step 2. - Extend your leg straight out; extend both arms in front of you, at shoulder level. Brace your core and look straight ahead.

Step 3. - Slowly squat down.

Step 4. - (optional) pause at the bottom.

Step 5. Keep your (free) leg and arms extended for the whole duration.