Muscles worked
What the mountain climber trains
Tap a muscle to see just that one and what it does in the lift.
Before the first rep
How to set up
- 01
Hands under shoulders. Place your hands flat on the floor, shoulder width apart, with your wrists directly under your shoulders and your fingers spread.
- 02
High plank. Step your feet back, about hip width apart, until your body is in a straight line from head to heels, arms straight, weight on the balls of your feet.
- 03
Brace. Squeeze your glutes lightly and tighten your stomach as if bracing for a poke, so your low back stays flat rather than sagging.
- 04
Push the floor away. Press through your palms so your shoulder blades spread slightly, your upper back stays full and your shoulders stay away from your ears.
- 05
Neck neutral. Look at the floor a little ahead of your hands so your head lines up with your spine.
Step by step
How to do the mountain climber
- 01
Drive one knee in. Bend one knee and pull it toward your chest. Let that foot touch down lightly under your hip, or keep it just off the floor. Your shoulders stay over your hands.
- 02
Return it. Push that foot back to the start so the leg is long again, with the ball of the foot on the floor.
- 03
Switch legs. As the first leg goes back, drive the other knee in. Start slowly, one leg at a time, until the switch feels smooth.
- 04
Find your rhythm. Once your form holds, speed up into a running rhythm. Your hips stay level with your shoulders and barely bounce.
- 05
Breathe. Keep breathing steadily through your nose and mouth rather than holding your breath, especially on longer intervals.
- 06
Finish. When the time or reps are done, bring both feet back to the plank, then lower your knees to the floor to rest.
Cues to say in your head
- Shoulders over hands
- Hips level with shoulders
- Knee to chest
- Push the floor away
- Quiet feet
- Brace, then run
Fix these first
Common mistakes
Hips piking up high
Lower your hips until your body forms a straight line from your shoulders to the heel of your straight leg. A high pike takes the load off your abs and turns the move into a jog in place.
Low back sagging
Brace your stomach and squeeze your glutes. If you cannot stop the sag, slow down or put your hands on a bench.
Shoulders drifting behind your hands
Keep your shoulders stacked over your wrists. Rocking back shortens the knee drive and makes your core do less.
Tiny, fast taps instead of real knee drive
Bring each knee well toward your chest. Speed only counts if the range is still there.
Hips bouncing and twisting
Slow the pace until your hips stay level, then build speed back up. Steadiness matters more than how many reps you fit in.
Shoulders sinking toward your ears
Push the floor away so your shoulder blades spread slightly and your upper back stays full.
Stay safe
Mountain climbers put a lot of weight through your wrists and shoulders, so warm them up first and use a mat or a firm surface that does not slide. If your wrists complain, put your hands on a bench or box, or grip dumbbell handles to keep your wrists straight. To end a set, bring your feet back and drop your knees to the floor. Stop if you feel sharp pain in your wrists, shoulders or low back, or if you get dizzy or unusually short of breath, and talk to a doctor or physical therapist if pain keeps coming back.
Programming
Sets, reps and how much weight
| Goal | Sets | Reps | Load | Rest |
|---|---|---|---|---|
| Conditioning | 6 to 10 | 20 to 30 sec | 75–90% 1RM | 30 to 60 sec |
| Endurance | 3 to 4 | 30 to 60 sec | 50–65% 1RM | 45 to 90 sec |
| Technique | 2 to 3 | 10 to 20 per leg | 40–50% 1RM | 60 sec |
Plan your next session
Put in a recent set. You get working weights for your goal, a warm-up and the plates to load.
Estimated 1RM 216 lb
Endurance sets
108–140lb
3 to 4 sets of 30 to 60 sec reps, 45 to 90 sec rest. A steady pace you can hold for the whole interval without your hips rising.
Estimates use the Epley formula and work best from sets of 3 to 8 reps. Treat them as a starting point and adjust by how the first working set moves.
Questions
Mountain Climber questions
What muscles do mountain climbers work?
Mainly your abs, which keep your pelvis steady, and your hip flexors, which pull each knee in. Your obliques stop your hips from twisting, and your shoulders, chest, serratus and triceps hold the plank.
What is good mountain climber form?
Hands under your shoulders, body in a straight line, and hips level with your shoulders as each knee drives toward your chest. If your hips pike up or your back sags, slow down until you can hold the line.
Are mountain climbers cardio or strength?
Both, depending on pace. Done fast in short intervals they are a conditioning drill that raises your heart rate quickly; done slowly they are a core exercise.
How many mountain climbers should I do?
Most people use time rather than reps: 20 to 30 seconds hard with rest between, repeated 6 to 10 times, for conditioning. For core work, 2 to 3 slow sets of 10 to 20 per leg is plenty.
Do mountain climbers burn belly fat?
No exercise burns fat from one spot. Mountain climbers strengthen your abs and burn calories as part of your training, but fat loss around your waist comes from your overall diet and activity.
Should my knee touch my elbow?
No, the standard version drives the knee straight toward your chest, and it does not need to touch anything. Bringing the knee across toward the opposite elbow is a cross body version that tends to work your obliques more.
Train in Protocol
Log your mountain climber by voice. Protocol tracks the rest.
Your last session shows up before every set, warm-ups and plates are worked out for you, and your coach sees every lift next to your sleep and recovery.