Strength exercise

Sit-up (Butterfly)

How to do it

  1. Lie on the back with the knees bent out to the sides and the soles of the feet pressed together.
  2. Rest the hands lightly behind the head or crossed over the chest without pulling on the neck.
  3. Brace the core and curl the torso up and forward toward the joined feet.
  4. Exhale through the curl and keep the knees relaxed open in the butterfly position throughout.
  5. Lower the torso back down with control until the shoulder blades touch the floor, then repeat.
  6. Keep the movement driven by the abdominals rather than yanking the head or neck forward.

Muscles worked

CoreThe group of trunk muscles across the abdomen, sides, and lower back that stabilize the spine and pelvis and transfer force between the upper and lower body. All Core exercises

Related Core exercises

Type
Strength
Equipment
Bodyweight
Primary muscles
Core
Measured in
Reps and weight
Tools
1RM Calculator