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  5. Shoulders
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  7. Incline Mountain Climber On Stepbox

Exercise guide

Incline Mountain Climber On Stepbox

  • Intermediate
  • Compound
  • Timed hold
  • Lower legs
  • Shoulders
  • Upper legs
  • Waist

The incline mountain climber reduces the weight-bearing load on the upper body, making it an excellent beginner-friendly core exercise that targets the lower abs and hip flexors. The elevated position allows for a greater range of motion at the hip while building shoulder stability and cardiovascular endurance.

Reviewed by the Crucible Fit team · Updated June 2026

Watch the Incline Mountain Climber On Stepbox demonstrationVideo and instructions for every movement are in the Crucible Fit app.

Muscles worked

Primary

  • Abs
  • Deltoids
  • Obliques

Secondary

  • Erector spinae
  • Glutes
  • Hamstrings

Equipment

  • Body weight

Setup

  1. Place your hands shoulder-width apart on the edge of a stable stepbox or bench.
  2. Step your feet back into a high plank position, forming a straight line from your head to your heels.
  3. Position your shoulders directly over your wrists to ensure proper joint stacking.

How to do it

  1. Drive one knee toward your chest in a controlled motion, exhaling as you contract your abdominals.
  2. Return the foot to the starting position while inhaling, then immediately drive the opposite knee forward.
  3. Maintain a steady, rhythmic pace, alternating legs while keeping your hips level with your shoulders.
  4. Focus on a 1-1-1 tempo: one second in, one second back, with no pause between legs.

Form checklist

  • Keep your back flat and avoid rounding your shoulders or arching your lower back.
  • Ensure your hips do not bounce up and down as you switch legs.
  • Maintain a neutral neck by looking at the top of the stepbox rather than your feet.
  • Keep your core braced as if preparing for a punch throughout the entire set.

Pro tips

  • Imagine pulling your belly button toward your spine to maximize deep transverse abdominis engagement.
  • Keep your weight shifted forward over your hands rather than pushing back into your heels to keep the tension on the core.

Make it harder

  • Increase the speed of the movement to a 'running' pace to elevate heart rate and metabolic demand.
  • Perform a cross-body variation by driving your knee toward the opposite elbow to increase oblique recruitment.

Frequently asked

What muscles does the incline mountain climber on stepbox work?
The incline mountain climber on stepbox primarily targets the abs, deltoids, and obliques, and also works the erector spinae, glutes, and hamstrings as secondary muscles.
What equipment do you need for the incline mountain climber on stepbox?
The incline mountain climber on stepbox requires no equipment — just your body weight.
Is the incline mountain climber on stepbox good for beginners?
The incline mountain climber on stepbox is rated intermediate. Build a base with simpler variations first, then progress to it with light load and strict form.

Related exercises

  • 45 Degrees Arms PlankIntermediate · abs, deltoids, obliques, and pectorals
  • Alternate Single Leg Raise PlankIntermediate · abs, deltoids, hamstrings, and obliques
  • Bear Crawl Low HipIntermediate · abs, deltoids, and obliques
  • Bear Plank Floating Leg ExtensionIntermediate · abs, deltoids, hamstrings, and obliques

Train it with Crucible Fit.

Every movement in this library is in the app with video and instructions, ready for your own sessions on the days between Crucibles. Your first Crucible is on us.

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