Oblique Crunch: Video Guide, Form Tips & How-To

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Oblique Crunch Overview

The oblique crunch is a floor move for your side abs. Those side muscles are called your obliques. They run along the sides of your belly. The move also works your main abs. You do not need any gear. You just lie on your back and twist as you crunch. You bring one elbow toward the opposite knee. The oblique crunch is great for beginners. It helps carve strong sides and a tight middle. Strong obliques help you twist, bend, and stay steady. They also protect your lower back. You can do the oblique crunch at home or the gym. It fits well in any core workout. Add it near the end of your training.

What Is The Point of the Oblique Crunch?

The oblique crunch exercise targets your side abs to build a stronger core and better waist definition. It helps improve rotational strength for sports and daily activities.

How To Do The Oblique Crunch

  1. Lie on your back. Bend your knees and put your feet flat on the floor.
  2. Place your hands lightly behind your head. Do not lace your fingers tight.
  3. Take a breath in to get ready.
  4. Breathe out as you lift your shoulders off the floor.
  5. Crunch diagonally. Bring your right elbow toward your left knee.
  6. Focus on twisting your torso in the oblique crunch, not just moving your elbow.
  7. Squeeze your side abs hard at the top. Feel them work.
  8. Lower back down slowly and with control.
  9. Finish all your reps on one side first.
  10. Then switch. Bring your left elbow toward your right knee for the same reps.

Oblique Crunch Form Tips

  1. Twist from your torso, not your arm. Your obliques do the work.
  2. Keep your hands light behind your head. Do not pull on your neck.
  3. Move slow and smooth. Fast reps use momentum, not muscle.
  4. Breathe out as you crunch up. Breathe in as you lower.
  5. Keep your lower back near the floor. Do not arch it up.
  6. Lift your shoulder off the floor, not just your head.
  7. Keep your feet flat and still the whole set.
  8. Squeeze your side abs at the top of each rep.
  9. Look up and slightly across. Keep your chin off your chest.
  10. Lower with control. Do not flop back down.

Common Mistakes to Avoid for the Oblique Crunch

  1. Pulling on your neck with your hands. This can strain it. Keep your hands light and lift with your abs.
  2. Just moving your elbow. This skips the real work. Twist your whole torso instead.
  3. Going too fast. Speed uses bounce, not muscle. Slow down and feel each rep.
  4. Yanking your head forward. This hurts your neck. Keep your chin off your chest.
  5. Arching your lower back. This takes work off your abs. Keep your back near the floor.
  6. Holding your breath. This tires you out. Breathe out as you crunch.
  7. Using tiny reps. A short range does little. Crunch up and twist fully.
  8. Letting your feet lift and swing. This adds momentum. Keep your feet flat and planted.
  9. Doing both sides at once in a rush. This lowers focus. Finish one side, then switch.
  10. Only lifting your head. This is not a real crunch. Lift your shoulder off the floor.
  11. Forgetting to squeeze at the top. Then you lose tension. Pause and squeeze your side abs.

Oblique Crunch Workout Tips

  1. Feel your side abs squeeze on every rep. The mind guides the muscle.
  2. Move slow, mostly on the way down. A slow lower builds more strength.
  3. Add a short pause at the top. Hold the squeeze for one second.
  4. Do 12 to 20 reps per side. Your abs like higher reps.
  5. Do two or three sets each side. Rest a bit between them.
  6. Put this near the end of your workout. Save your energy for big lifts first.
  7. Twist a little more to feel it deeper. Aim your chest at the far knee.
  8. Keep your neck relaxed the whole time. Let your abs do the lifting.
  9. Try it on a mat for comfort. A hard floor can bruise your spine.
  10. Make it harder by holding a light weight on your chest.
  11. Make it easier by keeping your hands across your chest.
  12. Add reps slowly over time. Small jumps keep you growing.
  13. Film your set from the side. A quick video shows if you twist or just flap your arm.
  14. Do not train abs to failure daily. Two or three times a week is plenty.
  15. Stay steady when you get tired. Stop the set if your form breaks.
  16. Be patient with your progress. Strong sides take weeks of steady work.

Train Obliques With Your AI Trainer

  1. Go to the iOS App Store and search "GetFit AI: AI Fitness Trainer" or tap the button below to do the oblique crunch exercise on the app
  2. Download the app 📲
  3. Complete the quiz to build a custom AI workout plan 🤖
  4. Choose a trainer or build a custom plan targeting your obliques 💪
  5. Stay consistent, chat with your AI trainer anytime, and compete with friends to stay motivated 🏆

Weight & 1 Rep Max Calculator for the Oblique Crunch Exercise

Average Oblique Crunch standards by male, female, weight, age and height

Use this calculator to estimate a smart starting weight and one rep max for the Oblique Crunch. Treat it as your starting line. Your GetFit AI trainer fine-tunes the exact weights as you train.

Enter your stats to calculate your Reps & Weight
How is this calculated?

Estimates start from a percentage of your body weight for this movement pattern and equipment, adjusted for gender, age, and height. One rep max is projected from the 8-rep weight using the Epley formula. Every lifter is different, so use these as a conservative starting point, not a target.

Beginner8 reps 45 lbs
1 Rep Max55 lbs
Intermediate8 reps 55 lbs
1 Rep Max70 lbs
Advanced8 reps 70 lbs
1 Rep Max90 lbs

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