# Spider Mountain Climber - Canonical: https://fitwill.app/exercise/7463/spider-mountain-climber/ - Media ID: 7463 - Primary muscle: Obliques - Body part: Core - Equipment: Body Weight - Video: https://fitwill.app/videos/7463/spider-mountain-climber.mp4 ## Description The Spider Mountain Climber is a floor-based body weight exercise that combines the plank hold of a standard mountain climber with a wider, out-to-the-side knee drive. Instead of sending the knee straight forward, you pull it up and out toward the same-side elbow, which is where the spider nickname comes from. The result is a hybrid of core stability and hip mobility that challenges your trunk from a different angle than the classic version. Because the knee travels outside the line of your hands, your obliques and hip flexors do far more work than they would in a standard mountain climber. Your shoulders, chest, and arms stay loaded the entire time holding a high plank, while your glutes and hip rotators work to control the leg as it swings out and returns. It is essentially a moving side-body exercise layered on top of a plank. This variation suits anyone who has already learned the regular mountain climber and wants a stronger oblique and hip-flexor stimulus without adding equipment. It shows up in warm-ups, conditioning circuits, and core finishers, and it works well in small spaces because all you need is a floor and, ideally, an exercise mat for your hands and the tops of your feet. Setup matters more than speed here. If your hands sit too far forward or your hips ride high, the knee will simply fold under your body and the out-to-the-side path disappears. Keep your shoulders stacked over your wrists, your body in one long line from head to heel, and your weight distributed evenly across both palms. That base is what allows the knee to travel wide and high without your trunk twisting or sagging. To execute it well, think of drawing a curved path with your knee: out, up toward the elbow, and back along the same curve. Move deliberately rather than racing, especially on the first few reps, so you can feel the difference between this and a standard mountain climber. Once the path feels natural, you can speed up while keeping the knee outside the hands on every rep. The main safety points are wrist comfort and lower back position. If your wrists complain in a loaded plank, spread your fingers and press the base of each palm firmly into the floor, or use push-up handles. If your lower back arches as fatigue sets in, shorten the set rather than letting your hips drop, since a sagging plank position is where most people run into trouble with this movement. ## Instructions 1. Place an exercise mat on the floor and set up on your hands and knees, then extend both legs back so you are in a high plank with your hands directly under your shoulders. 2. Spread your fingers wide and grip the mat, keeping your arms straight with a soft bend in the elbows and your head in line with your spine. 3. Straighten your body into one line from head to heel, brace your abdominal muscles, and squeeze your glutes so your hips neither sag nor lift. 4. Shift your weight slightly into one hand as you lift your opposite foot off the floor. 5. Draw your knee up and out to the side in a curved path, aiming it toward the elbow on the same side, and let the hip open as the knee travels. 6. Hold the knee in the raised position for a brief moment, feeling the contraction along your side and front of the hip. 7. Return the foot to the starting plank position along the same curved path and set it down under control. 8. Repeat the knee drive on the other side, or complete all reps on one side before switching, depending on your workout format. 9. Exhale as each knee drives up and inhale as it returns to the plank. 10. Continue alternating until the set is complete, then stand up or sit back and reset your brace before the next set. ## Tips & Tricks - If your knee keeps folding forward under your torso instead of traveling wide, your hands are probably too far forward; recheck that your shoulders sit directly over your wrists before the next rep. - Rushing turns the Spider Mountain Climber into a sloppy standard climber, so slow the tempo down until the out-to-the-side path is consistent on every rep. - Let the foot of the working leg flex and drag lightly across the floor if that helps the hip open, but keep the foot of the standing leg planted where it started. - Press the floor away with your supporting arm rather than sinking into the shoulder, especially as fatigue makes the shoulders the first thing to break down. - Keep the hips low and level; if one hip spikes upward each time you drive a knee, reduce the height of the knee drive until you can keep the pelvis square. - If your wrists ache in the loaded plank position, switch to push-up handles or grip the edge of a sturdy bench to keep them neutral. - Breathe in a steady rhythm instead of holding your breath; many people hold it instinctively because the plank base feels demanding. - Stop the set the moment your hips start to sag or your lower back arches, because form quality here drops off faster than in slower core exercises. ## Frequently Asked Questions ### What muscles does the Spider Mountain Climber work? The primary work comes from the obliques and hip flexors, which drive the knee up and out toward the elbow. Your shoulders, chest, and arms hold the plank position, and the glutes help control the leg on the way back. ### How is the Spider Mountain Climber different from a regular mountain climber? A regular mountain climber sends the knee straight forward toward the chest, while the Spider version drives it out to the side toward the same-side elbow. That wider path shifts the emphasis toward the obliques and opens the hip more. ### Can beginners do the Spider Mountain Climber? Beginners who can hold a solid high plank for 20 to 30 seconds can start with slow reps and a smaller knee drive. If the full plank is too demanding yet, practice the knee path from a hands-and-knees position first. ### Why should my knee travel toward my elbow instead of my chest? The out-to-the-side path is what distinguishes this exercise and loads the side of your trunk. Sending the knee to the chest simply turns it back into a standard mountain climber. ### What is the most common mistake with the Spider Mountain Climber? The most common mistake is letting the hips rise or sag as the knee drives out, which removes tension from the core. Keep the plank line intact and shorten the range if needed to hold it. ### What can I substitute if the Spider Mountain Climber is too hard? Start with a regular mountain climber to build plank endurance, or use the Spiderman plank, which uses the same out-to-the-side knee path at a slower pace with a pause. Cross-body mountain climbers are another option that targets the obliques from the opposite angle. ### Should I move fast or slow during the Spider Mountain Climber? Learn the movement slowly first so every knee stays outside your hands, then increase the pace gradually. Controlled reps build better hip mobility and core control than fast, jumbled ones. ### Is the Spider Mountain Climber safe for my wrists? The wrists stay loaded in extension for the whole set, which can bother some people. Spread your fingers and press firmly through the base of the palms, or use push-up handles if you need a neutral wrist position. ### How many reps of the Spider Mountain Climber should I do? A practical range is 8 to 12 knee drives per side for strength and control, or 30 to 45 seconds of continuous alternating reps in a conditioning circuit. Stop when your plank position breaks down, not just when your legs tire. ### Where does the Spider Mountain Climber fit in a workout? It works well as a dynamic warm-up for the hips, as a core block after lower body training, or as a station in a body weight circuit. Because it needs no equipment, it is easy to slot in almost anywhere.