Inchworm and Mountain Climbers
- Target muscle
- —
- Equipment
- Body weight
- Body part
- Plyometrics
- Type
- Aerobic
The inchworm and mountain climbers is a compound bodyweight aerobic exercise that combines two movements into a single flowing sequence, engaging the core, shoulders, hip flexors, quads, and hamstrings throughout. The inchworm phase builds shoulder stability and hamstring flexibility, while the mountain climber phase drives the heart rate up and challenges core endurance. Together they make an effective warm-up or conditioning finisher that requires no equipment.
How to do the Inchworm and Mountain Climbers
- 1Stand tall with your feet hip-width apart and your core braced.
- 2Hinge at your hips and bend forward, placing both hands flat on the floor in front of your feet.
- 3Walk your hands forward one at a time until your body forms a straight line from head to heels in a high plank position.
- 4Once in the plank, drive your right knee toward your chest, then return it to the start position.
- 5Immediately drive your left knee toward your chest, then return it to the start position — that is one pair of mountain climbers.
- 6Perform two to four mountain climber reps per leg, keeping your hips level and your core tight throughout.
- 7Walk your hands back toward your feet, one at a time, maintaining control.
- 8Stand back up by pressing through your feet and returning to the starting position.
- 9Repeat the full sequence for the prescribed number of reps or duration.
Form tips
- Keep your hips level during the mountain climber phase — do not let them pike up or sag toward the floor.
- Move at a smooth, controlled pace during the inchworm walk-out rather than rushing, to protect your lower back.
- Actively squeeze your core and glutes in the plank position before beginning the mountain climbers.
- Keep your shoulders stacked directly over your wrists throughout the plank phase.
- Breathe steadily — exhale as you drive each knee in, inhale as you return it.
Common mistakes
- Letting the hips pike upward during mountain climbers, which reduces core engagement and shifts stress to the lower back.
- Rushing through the inchworm walk-out with bent knees, which limits the hamstring stretch that is part of the movement's benefit.
- Allowing the lower back to hyperextend and the hips to sag in the plank, which strains the lumbar spine.
- Losing shoulder stability by letting the elbows flare wide, which reduces control and increases joint stress.
- Holding your breath during the mountain climber phase, which accelerates fatigue and disrupts rhythm.
Frequently asked questions
What muscles do inchworms and mountain climbers work?
The combination works the core (rectus abdominis, obliques, transverse abdominis), shoulders, hip flexors, quads, and hamstrings. The inchworm phase emphasizes hamstring flexibility and shoulder stability, while mountain climbers challenge hip flexors and core endurance.
Is this exercise suitable for beginners?
Yes, with some modification. Beginners can slow the pace, reduce the number of mountain climber reps per cycle, or bend their knees slightly during the inchworm walk-out if hamstring flexibility is limited.
Can I use inchworms and mountain climbers as a warm-up?
They work well as a dynamic warm-up because the inchworm mobilizes the hamstrings and thoracic spine while the mountain climbers elevate heart rate and activate the core — both useful before a strength or cardio session.
How many reps or how long should I do this exercise?
For warm-up purposes, five to eight full cycles is usually enough. As a conditioning drill, work in timed intervals such as 30 to 45 seconds on with 15 to 30 seconds of rest for two to four rounds.
How is this different from doing inchworms and mountain climbers separately?
Combining them into one continuous sequence increases the aerobic demand and keeps your heart rate elevated, making it more efficient as a conditioning tool than performing the two exercises in separate sets.
