Exercise Overview

Step-ups are a functional exercise that directly translates to climbing stairs—one of the most common challenges after ACL surgery. They build single-leg quad strength, hip control, and balance while progressively loading your surgical leg.

Why Step-Ups Are Essential

  • Functional: Directly mimics stair climbing
  • Single-leg loading: Addresses asymmetries
  • Progressive: Easy to adjust difficulty with step height
  • Quad focus: Excellent quad strengthener
  • Balance: Challenges stability on one leg

How To Perform

1

Set Up

Stand facing a step, box, or stair. Start with a low height (4-6 inches) and progress higher as strength improves. Have something nearby for balance support if needed.

2

Place Your Foot

Place your surgical leg on the step with your entire foot flat. The step should be high enough that your knee is bent to about 60-90 degrees.

3

Step Up

Push through your heel and straighten your leg to step up. Focus on using your lead leg—don't push off with your back leg. Keep your torso upright.

4

Control at the Top

Stand fully upright on the step. Pause briefly to ensure you have balance and control.

5

Step Down

Slowly lower your back leg to the floor with control. This eccentric phase is just as important as stepping up—don't just drop down.

6

Watch Your Knee

Throughout the movement, keep your knee tracking over your toes—not collapsing inward.

Common Mistakes

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Pushing Off Back Foot

Using your back leg to push up defeats the purpose. All the work should come from the leg on the step.

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Knee Valgus

Letting your knee collapse inward is common when fatigued. Stop or lower the step height if this happens.

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Step Too High

Starting with too high a step compromises form. Master lower heights before progressing.

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Dropping Down Fast

Control the descent. The lowering phase builds strength and protects your knee.

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Leaning Forward

Keep your torso upright. Excessive forward lean shifts stress and reduces quad engagement.

Sets, Reps & Frequency

Phase Step Height Sets Reps Frequency
Week 6-8 4-6 inches 2-3 8-10 each leg Daily
Week 8-12 6-8 inches 3 10-12 each leg Daily
Month 3-6 8-12 inches 3 10-15 each leg 3-4x/week
Month 6+ 12+ inches / weighted 3-4 10-12 each leg 2-3x/week

Variations & Progressions

Forward Step-Up

Standard version: face the step and step up. Focus on quadriceps.

Beginner

Lateral Step-Up

Stand beside the step and step up sideways. Great for hip abductors and frontal plane strength.

Intermediate

Step-Up with Knee Drive

At the top, drive your back knee up to hip height. Adds balance challenge and hip flexor work.

Intermediate

Weighted Step-Up

Hold dumbbells at your sides or a barbell on your back. Significantly increases strength demand.

Advanced

Step-Down (Eccentric Focus)

Start on the step and slowly lower yourself down. Excellent for eccentric quad control.

Intermediate

Box Step-Up (High Box)

Use a higher box (knee height or above). Requires more strength and ROM.

Advanced