The short version
- Slide down a wall until your knees are bent, then hold still.
- Start higher (knees at a gentle bend) and work down toward thighs parallel.
- It is an isometric hold, so it builds strength with no movement.
A wall sit is an isometric exercise: your thigh muscles work hard while nothing moves. That makes it easy to do anywhere and easy to scale.
How long?
Start with 3 holds of 15 to 30 seconds at a comfortable depth. Add time or go a little lower when the hold feels steady. Keep breathing the whole time.
Step by step
- Stand with your back flat against a wall, feet about hip-width and a stride out in front.
- Slide down until your knees are bent to a depth you can hold, up to thighs parallel to the floor.
- Keep knees over ankles, not past your toes, and your whole back on the wall.
- Hold and breathe slowly.
- Slide back up to stand.
Common mistakes and fixes
- Going too deep too soon. Fix: start higher.
- Knees caving in. Fix: press them out over your feet.
- Holding your breath. Fix: count breaths.
Do this today
Do 3 wall sits of 20 seconds at a depth that feels hard but steady. Rest 40 seconds between.
Questions people ask
How long should a beginner do a wall sit?
15 to 30 seconds, repeated 3 times, is a good start.
Do wall sits hurt your knees?
They can be knee-friendly at a shallow depth. Stop and ask a clinician if you feel knee pain.
Are wall sits strength or cardio?
Strength. They are an isometric leg exercise.
Sources
- American College of Sports Medicine. Progression models in resistance training for healthy adults. Med Sci Sports Exerc, 2009. Checked October 9, 2026.
- AAOS OrthoInfo. Knee Conditioning Program. Checked October 9, 2026.
- U.S. Department of Health and Human Services. Physical Activity Guidelines for Americans, 2nd edition (2018). Checked October 9, 2026.
Education only. Not medical advice. Confirm with your clinician.
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