Bicycle Crunch

Starting position

• Lie on your back, hands loosely behind the head, elbows out.
• Lift the shoulders slightly off the floor, raise the legs, knees bent about 90°.
• Lower back stays on the floor.

Execution

• Rotate the upper body and bring the right elbow to the left knee while extending the right leg forward.
• Hold briefly, then switch sides through the middle.
• Keep breathing evenly; each side counts as one rep.
• Easier: extend the legs higher or switch more slowly.

Common mistakes

• Pulling on the head with the hands.
• Moving only the elbows instead of rotating the upper body.
• Hollow back because the extended leg sinks too low.
• Too fast, with momentum instead of the abs.