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Sit-Up exercise demonstration - starting position (step 1 of 2)
Showing step 1 of 2
Step-by-step demonstration of the Sit-Up exercise showing proper form and technique

Sit-Up

Target Muscles

Primary:
Abs

Equipment Required

Bodyweight

Exercise Type

Reps Only

How To Do

Lie on your back with knees bent, feet flat on the floor, and hands behind your head. Engage your core and lift your upper body toward your knees, keeping your lower back on the ground, then slowly lower back down. Avoid pulling on your neck and keep your elbows wide throughout the movement.

Step-by-Step Instructions

  1. Lie flat on your back on the floor or a mat with your knees bent and feet flat on the ground. Place your hands behind your head, keeping your elbows wide apart. Avoid pulling on your neck.
  2. Engage your core muscles by tightening your abdominal muscles.
  3. Slowly lift your upper body off the ground, curling your torso towards your knees. Keep your lower back in contact with the floor as you lift.
  4. Continue to lift until your upper body is in a seated position or as far as your flexibility allows.
  5. Pause briefly at the top of the movement, ensuring your core remains engaged.
  6. Slowly lower your upper body back down to the starting position, maintaining control throughout the movement.
  7. Repeat for the desired number of repetitions.

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

Alternative Exercises

V-Up

V-Up

Abs

Bodyweight

Jackknife Sit-Up

Jackknife Sit-Up

Abs

Bodyweight

Kettlebell Sit-up

Kettlebell Sit-up

Abs
Upper Abs

Kettlebell

Barbell Press Sit-Up

Barbell Press Sit-Up

Abs
Chest

Bench • Barbell

Frequently Asked Questions

Which muscles do sit-ups work the most?
Sit-ups primarily target the rectus abdominis, which is the main muscle responsible for core flexion. They also engage the obliques for rotational stability, as well as the upper and lower abs when performed with proper form.
Do I need any equipment to do sit-ups at home?
Sit-ups are a bodyweight exercise and require no special equipment, making them perfect for home workouts. For added comfort, you can use an exercise mat, and for increased challenge, you can hold a weight plate or medicine ball.
Are sit-ups good for beginners?
Sit-ups can be suitable for beginners if done with correct technique and moderate repetitions. Beginners should start with bent-knee sit-ups or partial crunches to build core strength and avoid lower back strain.
What are common mistakes to avoid when doing sit-ups?
Common mistakes include pulling on the neck, using momentum instead of core engagement, and lifting the lower back off the floor. To prevent injury, keep elbows wide, engage the abs throughout, and move in a controlled manner.
How many sit-ups should I do for best results?
For most people, 3 sets of 10–20 sit-ups is a good starting point, adjusting reps based on fitness level. Quality form matters more than quantity, so increase reps gradually as your core gets stronger.
Are sit-ups safe for the lower back?
Sit-ups can place stress on the lower back if done incorrectly or excessively. To reduce risk, maintain a neutral spine, avoid jerking movements, and strengthen surrounding core muscles for better support.
What are some good sit-up variations for more challenge?
Advanced variations include weighted sit-ups, decline bench sit-ups, and twisting sit-ups to target the obliques. You can also try V-ups or bicycle crunches for greater overall core engagement.