Mark it once you can do it without this page open.

How to do it

  1. Stand tall with feet hip-width apart, next to a wall or rail if you need balance.
  2. Take a long step forward, keeping the feet hip-width apart rather than on a tightrope.
  3. Lower the back knee straight down toward the floor until both knees are bent to about a right angle.
  4. Keep your chest up and your weight spread through the whole front foot.
  5. Watch that the front knee points over the middle toes and does not cave inward.
  6. Push through the front heel to return to standing.
  7. Switch legs, and try reverse lunges, stepping backward, if forward lunges bother your knees.

Stop and call a professional if

  • You have a heart condition, high blood pressure, a recent injury or surgery, or you are unsure whether exercise is safe for you: ask a clinician before you start.
  • You feel chest pain, pressure, faintness or unusual breathlessness: stop and call your local emergency number, 911 in the US.
  • You feel sharp knee pain or the knee gives way: stop and see a clinician or physical therapist.

Common mistakes

  • Taking a short step, so the front knee shoots far forward and the heel lifts.
  • Letting the front knee fall inward.
  • Leaning the chest over the front thigh.

Quick self-check

Three questions. Your last score is kept in this browser.

1. Where should the front knee point?
2. Which lunge is often easier on the knees?
3. How do you return to standing?

Teach this to someone

A one-page sheet for showing a friend, a roommate or a kid: what to say, what to show, and one question to check it landed.

Sources

  • National strength and conditioning coaching guidance on exercise technique, 2025. Checked September 28, 2026.

Last reviewed . First published .