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Seated Knee Tuck (Chair)

  • 🧴 Household items
  • At home
  • Beginner

Sitting on a chair and lifting your knees towards your chest. If getting down on the floor is hard, this is the easiest stomach exercise.

⏳ Trainer review pending — follow carefully and ask a trainer if you are unsure.

🖼️ Step-by-step pictures coming soon

How to do it

  1. Sit near the front of a sturdy chair (no wheels). Hold the sides of the seat with both hands.
  2. Lean back a little, keeping your back straight.
  3. Tighten your stomach and lift both knees up towards your chest.
  4. Lower your feet slowly, lightly touching the floor or stopping just above it.

Breathing: Breathe out as you lift your knees, breathe in as you lower them.

How much to start with: 2–3 sets × 8–12 reps

❌ Common mistakes

  • Rounding your back and hunching forward.
  • Swinging your legs up with a jerk.

⚠️ Safety

  • Keep the chair against a wall so it can't slide back.

Muscles worked

Main: Abs

Next step (a bit harder)Reverse Crunch

More ways to train Abs

Dead Bug Lying on your back and slowly straightening opposite arm and leg. The safest way to strengthen your stomach without straining your lower back.
  • 🙌 No equipment
  • At home / At the gym
  • Beginner
 Crunch Lying on your back and lifting just your shoulders a little off the floor. Note: stomach exercises make the muscle stronger, but they don't burn belly fat on their own.
  • 🙌 No equipment
  • At home / At the gym
  • Beginner
 Plank Holding your body in a straight line on your forearms and toes (or knees). Builds strength through your whole core. Start with your knees down.
  • 🙌 No equipment
  • At home / At the gym
  • Beginner
 Ab Crunch Machine Sitting and curling forward against the machine's handles or pad. No strain on your neck, and you can choose the weight.
  • ⚙️ Gym machine
  • At the gym
  • Beginner
 Captain's Chair Knee Raise Supporting yourself on your forearms in the gym's captain's chair and lifting your knees. A hard stomach exercise — try it once reverse crunches feel easy.
  • ⚙️ Gym machine
  • At the gym
  • Some experience