The reverse plank primarily works the muscles along the back of your body: glutes, hamstrings, lower back, and shoulders. It also engages your core stabilizers and the muscles between your shoulder blades, making it one of the more efficient bodyweight exercises for strengthening your entire posterior chain in a single hold.
Primary Muscles Targeted
Unlike a standard front plank, which loads the front of your torso, the reverse plank flips the demand to the backside. The biggest contributors are your glutes and hamstrings, which fire to keep your hips lifted, and your lower back muscles (the erector spinae), which work to maintain a straight line from head to heels. Your posterior deltoids and the muscles that pull your shoulder blades together also activate to support your upper body weight.
A study published in Frontiers in Physiology measured muscle activation during both front and reverse planks using electromyography (EMG). The reverse plank produced roughly 746% greater upper back muscle activity and 855% greater lower back muscle activity compared to the standard prone plank. Those are massive differences, and they illustrate why the reverse plank is worth adding if your routine is heavy on front planks but light on posterior work.
The front plank, by contrast, dominated in one area: the external obliques, the muscles along the sides of your waist. Front planks activated those at about 40% of maximum effort, while the reverse plank barely reached 5%. So the reverse plank isn’t replacing your front plank. It’s filling a gap your front plank can’t reach.
How It Strengthens Your Core
The reverse plank does engage your abdominal muscles, but not as its primary job. Your abs work isometrically to keep your trunk rigid and prevent your spine from overarching. Think of them as the co-pilots here, stabilizing while your back muscles and glutes do the heavy lifting. You’ll feel your deep core engaged, particularly the muscles closest to your spine that help with spinal stabilization, but you won’t get the same oblique or rectus abdominis burn you’d get from a front plank or crunch variation.
This combination of back strengthening and moderate abdominal engagement is actually what makes the reverse plank useful for rehabilitation. It trains both sides of the trunk simultaneously, building the kind of balanced core stability that protects your lower back during everyday movements.
Posture Benefits
One of the most practical payoffs of the reverse plank is its effect on posture, specifically the rounded-shoulder position that comes from hours of desk work, driving, or phone use. A study in the Journal of Functional Morphology and Kinesiology tested the reverse plank on people with forward shoulder posture and found it increased thickness in the muscles that pull the shoulders back (the serratus anterior and lower trapezius) while decreasing thickness in the muscles that pull them forward (the pectorals and upper trapezius).
In other words, the reverse plank simultaneously stretches the tight front-body muscles and strengthens the weak back-body muscles that contribute to slouching. The researchers noted this dual effect makes it particularly practical because it requires no equipment and addresses both sides of the postural imbalance in a single exercise. For anyone who sits for long stretches, strengthening these muscles can make prolonged sitting noticeably more comfortable.
How to Do It Correctly
Sit on the floor with your legs extended straight in front of you. Place your palms on the floor slightly behind and just outside your hips, fingers spread wide. Press into your hands, squeeze your glutes, and lift your hips toward the ceiling until your body forms a straight line from your head to your heels. Point your toes, keep your legs straight, and look up toward the ceiling. Pull your belly button toward your spine to keep your core engaged throughout the hold.
The most common mistake is letting your hips sag. If your hips drop, the load shifts off your glutes and onto your wrists and shoulders, which defeats the purpose and increases joint stress. If you can’t maintain a straight line, shorten your hold time or try a regression (more on that below). Another frequent error is tucking your chin to your chest. Keeping your gaze upward helps maintain proper spinal alignment through the neck and upper back.
Hold Times for Different Levels
How long you hold the reverse plank depends on your current strength:
- Beginner: Four sets of 15 to 30 seconds
- Intermediate: Four sets of 45 seconds to one minute
- Advanced: Two to three sets of 90 seconds to two minutes
If you can’t hold for 15 seconds with good form, start with the bent-knee variation described below. Quality of position matters far more than duration. A 15-second hold with a perfectly straight body builds more useful strength than a 45-second hold with sagging hips.
Variations to Scale Difficulty
The simplest regression is the reverse tabletop: same setup, but you bend your knees to 90 degrees so your feet are flat on the floor. This shortens the lever arm significantly, reducing the demand on your glutes and hamstrings while still training your shoulders and core. It’s an ideal starting point if the full reverse plank feels too intense.
To make it harder, try a single-leg reverse plank. Get into the standard position, then lift one foot off the floor and hold. This forces the glute on your supporting side to work overtime and adds a rotational stability challenge for your core. Alternate legs between sets.
Wrist Comfort Modifications
Wrist discomfort is the most common complaint with the reverse plank, since your hands bear a significant portion of your body weight in an extended position. A few adjustments can help. First, try rotating your fingers to point away from your body instead of toward it. Some people find this reduces wrist strain immediately. You can also place a foam wedge under the heels of your hands to decrease the angle of wrist extension. If neither of those works, drop to your forearms instead of your hands. This eliminates wrist involvement entirely while keeping the glute, hamstring, and back activation largely intact. Another option is placing your hands on the arms of a sturdy chair, which changes the wrist angle enough to reduce pressure.