What muscles does the Hand Opposite Knee Crunch work?

This exercise primarily targets the obliques and upper abs, helping to sculpt and define your core. It also engages the lower abs as a secondary muscle group due to the slight knee lift during each repetition.

Do I need any equipment to perform the Hand Opposite Knee Crunch?

No equipment is required because it is a bodyweight exercise. You can perform it anywhere with enough space to lie on your back although a yoga mat can make it more comfortable and reduce strain on your spine.

Is the Hand Opposite Knee Crunch suitable for beginners?

Yes, beginners can safely perform this move by keeping their movements controlled and avoiding excessive neck strain. Start with fewer repetitions and gradually increase as core strength and endurance improve.

What are common mistakes to avoid when doing the Hand Opposite Knee Crunch?

Many people tend to pull on their neck or hunch their shoulders, which can cause strain. Keep your elbows wide, engage your core throughout the movement, and twist from your torso instead of just pulling with your arms.

How many sets and reps should I do for the Hand Opposite Knee Crunch?

Aim for 2–3 sets of 12–20 reps per side, depending on your fitness level. Focus on quality form rather than rushing through repetitions to maximize muscle engagement and reduce injury risk.

Are there any safety tips for performing the Hand Opposite Knee Crunch?

Avoid jerking motions and maintain a neutral spine position throughout the crunch. If you experience lower back discomfort, reduce your range of motion or place a small cushion behind your lower back for support.

What variations can I try to make the Hand Opposite Knee Crunch more challenging?

You can add resistance by holding a light dumbbell or medicine ball in the reaching hand. Slowing down the twist or incorporating a brief hold at the peak contraction will also intensify the exercise and increase core activation.

Hand Opposite Knee Crunch

Target Muscles

Primary:

Obliques

Upper Abs

Secondary:

Lower Abs

Equipment Required

Bodyweight

Exercise Type

Reps Only

How To Do

Lie on your back with knees bent, feet flat, and hands lightly behind your head. Crunch up and twist your torso to bring your right hand toward your left knee as your left knee lifts slightly, then return to start and repeat on the other side. Keep your elbows wide and avoid pulling on your neck throughout the movement.

Step-by-Step Instructions

Lie flat on your back on the floor or a mat with your knees bent and feet flat on the ground.
Place your hands lightly behind your head, ensuring your elbows are pointing outward. Avoid pulling on your neck.
Engage your core by tightening your abdominal muscles.
Lift your upper body off the ground while simultaneously twisting your torso to bring your right hand toward your left knee. Your left knee should lift slightly toward your right hand.
Lower your upper body back to the starting position in a controlled manner.
Repeat the movement on the opposite side, bringing your left hand toward your right knee.
Continue alternating sides for the desired number of repetitions.

Explore more obliques exercises or bodyweight exercises in our exercise library.

Alternative Exercises

Elbow-to-Knee Crunch

Obliques

Upper Abs

Bodyweight

Bicycle Twisting Crunch

Obliques

Upper Abs

Bodyweight

Weighted Twisting Crunch (on bench)

Obliques

Upper Abs

Bench • Dumbbell

Kettlebell Double Windmill

Obliques

Kettlebell

Frequently Asked Questions

What muscles does the Hand Opposite Knee Crunch work?: This exercise primarily targets the obliques and upper abs, helping to sculpt and define your core. It also engages the lower abs as a secondary muscle group due to the slight knee lift during each repetition.
Do I need any equipment to perform the Hand Opposite Knee Crunch?: No equipment is required because it is a bodyweight exercise. You can perform it anywhere with enough space to lie on your back although a yoga mat can make it more comfortable and reduce strain on your spine.
Is the Hand Opposite Knee Crunch suitable for beginners?: Yes, beginners can safely perform this move by keeping their movements controlled and avoiding excessive neck strain. Start with fewer repetitions and gradually increase as core strength and endurance improve.
What are common mistakes to avoid when doing the Hand Opposite Knee Crunch?: Many people tend to pull on their neck or hunch their shoulders, which can cause strain. Keep your elbows wide, engage your core throughout the movement, and twist from your torso instead of just pulling with your arms.
How many sets and reps should I do for the Hand Opposite Knee Crunch?: Aim for 2–3 sets of 12–20 reps per side, depending on your fitness level. Focus on quality form rather than rushing through repetitions to maximize muscle engagement and reduce injury risk.
Are there any safety tips for performing the Hand Opposite Knee Crunch?: Avoid jerking motions and maintain a neutral spine position throughout the crunch. If you experience lower back discomfort, reduce your range of motion or place a small cushion behind your lower back for support.
What variations can I try to make the Hand Opposite Knee Crunch more challenging?: You can add resistance by holding a light dumbbell or medicine ball in the reaching hand. Slowing down the twist or incorporating a brief hold at the peak contraction will also intensify the exercise and increase core activation.