Crunch with hips flexed to 90 degrees and feet supported on elevation

Edited by Dr. Massimo Bonazzelli

Synonyms

The Crunch exercise with hips flexed to 90 degrees and feet raised is also known as a Crunch

Type of Exercise

Crunch with hips flexed to 90 degrees and feet supported on elevation is a monoarticular exercise

Variants

• Crunch on the ground
• Crunch with hips flexed to 90 degrees and feet in suspension
• Crunch on a flat bench with hips flexed to 90 degrees and feet supported on a rise
• Crunch on a flat bench with hips flexed to 90 degrees and feet in suspension

Crunch with hips flexed to 90 degrees and feet supported on elevation: Execution

The starting position sees the athlete lying supine on the floor or on a bench with the hips flexed at 90 ° and knees flexed so that both feet are resting on a rise, such as a chair, a bench (if lying on the floor) , or on a barbell (if lying on a flat bench press with a barbell). The lower limbs must remain motionless for the duration of the exercise. The head is initially in contact with the floor or bench. The hands can be held at the sides, crossed on the chest, on the sides of the head at the height of the temples, or behind the head with the shoulders fully flexed and the elbows extended. The list has been written in ascending order of difficulty. Once established where to position the limbs, it is no longer possible to change this parameter except as a cheating technique or to lighten the load during a series in "stripping". The execution consists in performing a spine flexion so that the upper back comes off the support surface, while the lower back remains in contact with the floor for the entire duration of the exercise. The distance between the chin and the sternum should remain as constant as possible. The range of motion is reduced, since raising the back too much ends up flexing the hip as well, transforming the crunch into a sit up. To emphasize the work of the oblique abdominals, it is possible to perform the concentric phase of the movement by twisting the torso to the right side ; in this movement the work of the external obliques of the left side and the internal obliques of the right side is maximized. The movement is unilateral and the description refers to the right side. Repeat in a mirror image for the left side.

Muscles involved in the Crunch exercise with hips flexed to 90 degrees and feet supported on an elevation

Group 0

• Rectus abdominis
• External obliques
• Internal obliques

Function of the stabilizing muscles: Stability of the spine and hips

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