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The HIT MethodAn independent guide to high-intensity training

Mountain Climber: How to Do It, Muscles Worked and Easier Options

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The mountain climber is a beginner level exercise that requires no equipment. It provides a low to moderate impact way to challenge your cardiovascular system while maintaining a strong plank position. By driving your knees toward your chest from a plank, you actively engage your core, hip flexors, and shoulders as the main muscles.

Your quadriceps and triceps act as supporting muscles to stabilize your body throughout the movement. Because it requires no gear, you can perform mountain climbers anywhere. Focus on a steady rhythm to build endurance and strength simultaneously without putting excessive stress on your joints.

Exercise data

Impact
Low to moderate
Level
Beginner
Equipment
None
Main muscles
core, hip flexors, shoulders
Also working
quadriceps, triceps
Movement
Driving the knees toward the chest from a plank
Low-impact swap
slow alternating knee drives with hands on a bench

How to do a mountain climber

Start in a high plank position with your hands planted firmly on the floor directly under your shoulders and your legs extended straight behind you.

  1. Brace your core and keep your back flat.
  2. Pull your right knee swiftly toward your chest without letting your right foot touch the floor.
  3. Push your right leg back to the starting plank position.
  4. Pull your left knee toward your chest in the same manner.
  5. Continue alternating legs at a brisk, steady pace.

Form cues

  • Keep your hips level and low.
  • Press the floor away with your hands.
  • Look slightly ahead of your fingertips.
  • Drive your knees straight forward.

Common mistakes

  • Bouncing hips. Squeeze your core and glutes to keep your pelvis stable as you switch legs.
  • Hands too far forward. Align your wrists directly underneath your shoulders to protect your joints and maintain balance.
  • Sagging lower back. Push active tension through your arms and brace your abdominal muscles to keep a straight spine.
  • Shortened range of motion. Pull each knee as close to your chest as possible before extending the leg fully back.

Easier and harder versions

Easier

  • slow alternating knee drives with hands on a bench
  • slow mountain climbers on the floor with pauses between each repetition

Harder

  • Cross-body mountain climbers, driving your knee to the opposite elbow.
  • Adding a push-up after every few knee drives.

Using it in intervals

When programming the mountain climber into your high-intensity intervals, use it to push your heart rate during active work periods. Aim for a consistent, rapid pace that you can sustain for the entire interval. As you get tired, your hips will naturally want to rise or sag. Fight this by consciously re-engaging your core and slowing down slightly if needed to maintain perfect plank form.

Formats that suit this move: 40/20 Intervals, EMOM Workout, Low-Impact HIIT Workout.

Similar moves

Curious about energy use? See calories burned: mountain climbers.

When to stop and see a doctor

  • Sharp pain in your wrists or elbows.
  • Sudden lower back pinching or spasms.
  • A popping sensation in your hip flexors.
  • Dizziness or chest pressure that feels abnormal.

This page is general information, not medical advice. If you have a heart condition, high blood pressure, joint problems, are pregnant or have been inactive for a long time, talk to your doctor before starting vigorous exercise.

How this page was made. Exercise data (impact, level, equipment, muscles) was compiled by our editors as a general anatomy and coaching guide. Text drafted with AI assistance and checked by the Training Desk; see how we write. Last checked October 2026.