BifitBifit
HomeExercisesBecome a Coach
Log In
HOMEEXERCISESBECOME A COACHLOG IN

Language

Legal

Terms of UsePrivacy PolicyDelete Account
BifitBifit

A modern and user-friendly mobile app that makes life easier for fitness enthusiasts. Tracking your workouts and progress is our priority.

Quick Links

  • Home
  • Exercises
  • Become a Coach
  • Download · Google Play
  • Download · App Store

Legal

  • Privacy Policy
  • Terms of Use
  • Support
  • Account Deletion

© 2026 Bifit. All rights reserved.

Designed for a healthy lifestyle

HomeExercisesLeg Pull-in Knee-ups

Leg Pull-in Knee-ups

Abdominals
Lower Abs
Beginner
Isolation
3-4Set
10-15Reps
60sRest
2-0-2-0Tempo
Leg Pull-in Knee-ups
Animation

Description

Leg Pull-in Knee-ups is an effective bodyweight exercise that targets the lower abdominal muscles. This movement works both the rectus abdominis and hip flexor muscles together. It can be performed on the floor or on a bench and requires no equipment. Keeping the abdominal muscles constantly engaged during the movement maximizes muscle activation. Despite its simple appearance, it provides quite an intense core workout when performed with proper form. It is suitable for both beginners and advanced athletes and can be done anywhere.

Step-by-Step Instructions

  1. 1

    Lie on your back with your hands at your sides

  2. 2

    Lift your legs slightly off the floor

  3. 3

    Pull your knees toward your chest by engaging your abdominal muscles

  4. 4

    Hold for 1-2 seconds at the top and feel the muscle contraction

  5. 5

    Slowly lower your legs back to the starting position

  6. 6

    Be careful not to let your lower back lift off the floor during the movement

Key Points

  • ✓Lie on your back on the floor, hands beside your hips
  • ✓Pull your knees toward your chest
  • ✓Lift your upper body off the floor, round your back
  • ✓Fully pull knees at the end of the movement
  • ✓Return slowly to the starting position

Common Mistakes

  • ✗Keeping back flat on floor - works abdominal muscles less
  • ✗Using momentum - less effective
  • ✗Not pulling knees fully - no full range of motion
  • ✗Straining the neck - risk of neck pain
  • ✗Holding breath - reduces performance

Breathing

Exhale as you pull your knees in, inhale as you return to the starting position.

Muscle Activation

rectus abdominis0%
hip flexors0%
obliques0%

Safety

Precautions

  • Those with lower back pain should perform with limited range
  • Should be avoided in the third trimester of pregnancy
  • Those with hip problems should be careful
  • Those with severe abdominal muscle injuries should get doctor approval

Safety Tips

  • Keep your lower back pressed to the floor during the movement
  • Exhale as you pull your knees toward your chest
  • Move slowly and controlled rather than quickly
  • Stop the movement if your lower back hurts

Frequently Asked Questions

Which muscles does Leg Pull-in Knee-ups work?

Leg Pull-in Knee-ups primarily works these muscles: Rectus abdominis. It also engages: Hip flexors, Obliques.

Is Leg Pull-in Knee-ups suitable for beginners?

Leg Pull-in Knee-ups is a Beginner level exercise. Learning difficulty: Easy.

Can Leg Pull-in Knee-ups be done at home?

Yes, Leg Pull-in Knee-ups can easily be done at home.

What are common mistakes when doing Leg Pull-in Knee-ups?

One of the most common mistakes: Keeping back flat on floor - works abdominal muscles less

How many sets and reps for Leg Pull-in Knee-ups?

Recommended: 3-4 sets and 10-15 reps.

Related Exercises

Exercises targeting similar muscle groups

Abdominals Exercises
Long Arm Crunch

Long Arm Crunch

Upper Abs

Figure-Four Crunch

Figure-Four Crunch

Obliques

Seated Flutter Kick

Seated Flutter Kick

Lower Abs

Frog Crunches

Frog Crunches

Upper Abs

Alternate Leg Raises

Alternate Leg Raises

Lower Abs

Mountain Climber

Mountain Climber

Lower Abs

Exercise Information

DifficultyBeginner
Movement TypeIsolation
FocusHypertrophy
Injury RiskLow
Set3-4
Reps10-15
Rest60 seconds
Tempo2-0-2-0
Spotter RequiredNo
Home / Gym
YesYes
Effectiveness4.1 / 5
Popularity7.3 / 10
Learning DifficultyEasy

Equipment

bodyweight

Primary Muscles

Rectus abdominis

Secondary Muscles

Hip flexorsObliques

Benefits

  • ✓Effectively targets lower abdominal muscles
  • ✓Supports rectus abdominis development
  • ✓Tightens the core region
  • ✓Can be performed without equipment

Goals

Muscle GainEndurance
Back to All Exercises
Leg Pull-in Knee-ups
Animation

Description

Leg Pull-in Knee-ups is an effective bodyweight exercise that targets the lower abdominal muscles. This movement works both the rectus abdominis and hip flexor muscles together. It can be performed on the floor or on a bench and requires no equipment. Keeping the abdominal muscles constantly engaged during the movement maximizes muscle activation. Despite its simple appearance, it provides quite an intense core workout when performed with proper form. It is suitable for both beginners and advanced athletes and can be done anywhere.

Step-by-Step Instructions

  1. 1

    Lie on your back with your hands at your sides

  2. 2

    Lift your legs slightly off the floor

  3. 3

    Pull your knees toward your chest by engaging your abdominal muscles

  4. 4

    Hold for 1-2 seconds at the top and feel the muscle contraction

  5. 5

    Slowly lower your legs back to the starting position

  6. 6

    Be careful not to let your lower back lift off the floor during the movement

Key Points

  • ✓Lie on your back on the floor, hands beside your hips
  • ✓Pull your knees toward your chest
  • ✓Lift your upper body off the floor, round your back
  • ✓Fully pull knees at the end of the movement
  • ✓Return slowly to the starting position

Common Mistakes

  • ✗Keeping back flat on floor - works abdominal muscles less
  • ✗Using momentum - less effective
  • ✗Not pulling knees fully - no full range of motion
  • ✗Straining the neck - risk of neck pain
  • ✗Holding breath - reduces performance

Breathing

Exhale as you pull your knees in, inhale as you return to the starting position.

Back to All Exercises

Related Exercises

Exercises targeting similar muscle groups

Abdominals Exercises
Long Arm Crunch

Long Arm Crunch

Upper Abs

Figure-Four Crunch

Figure-Four Crunch

Obliques

Seated Flutter Kick

Seated Flutter Kick

Lower Abs

Frog Crunches

Frog Crunches

Upper Abs

Alternate Leg Raises

Alternate Leg Raises

Lower Abs

Mountain Climber

Mountain Climber

Lower Abs