Balance · Beginner
Single-Leg High Box Squat
This exercise has you stepping up onto a raised box one leg at a time while holding a band or rope for support. It builds single-leg strength in your thighs, hips, and backside — the exact muscles that keep you steady on stairs and uneven ground. Because you're working one leg at a time, it also helps even out strength differences between sides, which is common after years of favoring one leg.
Category
Balance
Difficulty
Beginner
Equipment
Other
MET
2.5
Primary muscles
Secondary muscles
The movement
Form cues
- 01
Stand facing the box with the band or rope at chest height — grip it lightly, just enough to steady yourself, not to pull yourself up.
- 02
Plant your working foot flat on the top of the box before you shift your weight onto it.
- 03
Press through your whole foot — heel included — as you straighten your leg to stand up on the box.
- 04
Keep your chest up and your eyes forward so your back doesn't round over.
- 05
Let your free leg hang naturally beside the box — don't swing it to help you rise.
- 06
Lower yourself back down slowly and with control, bending the standing knee until your foot touches the floor.
- 07
Complete all reps on one side before switching legs.
Dosage
How long, how many
Sets
3
Reps
8-12
Rest
60 sec
Watch for
Common mistakes
Pulling hard on the band to haul yourself up — if your arm is doing the work, slow down and let your leg push you.
Letting the standing knee collapse inward — watch that your knee stays lined up over your second or third toe the whole time.
Dropping down fast on the way back — if you hear a thud when your foot lands, you're moving too quickly; aim for a smooth, quiet descent.
Leaning your torso far forward over the box — a slight lean is fine, but if your chest is nearly parallel to the floor, you're compensating for weak hips; try a lower box.
Holding your breath — breathe out as you push up, breathe in as you lower back down.
Scale it
Easier and harder variations
Easier
Use a lower box or a sturdy step so the range of motion is smaller and the push-up is less demanding.
Start here if stepping onto a high surface feels shaky or your standing knee aches.
Harder
Loosen your grip on the band so you're barely touching it, relying more on your own balance.
Try this once you can do 10 smooth reps on each side without tugging the band.
Note
If you have knee discomfort, reduce box height so your knee bends no more than 45 degrees, and pause at the top for a second before lowering.
Use this version with knee arthritis or after knee replacement — check with your doctor or physical therapist first.
Sources
Form descriptions and cues are sourced from wger (CC-BY-SA 4.0) and the Free Exercise DB (public domain), edited for the 60+ audience. MET value cites Ainsworth BE, et al. 2011 Compendium of Physical Activities. Med Sci Sports Exerc 43(8):1575-1581.
- free-exercise-db · Unlicense / Public Domain
- claude