What are straight leg crunches?

Place hands behind your knees. Using the strength in your arms and your abs, lift your shoulder blades off of the floor; shoulder blades should remain above the ground for the remainder of the exercise. While holding your legs, contract your abdominal muscles and lift the chest up toward the ceiling, 10-20 times.

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How long should I bicycle crunch for?

Lower your leg and arm at the same time while bringing up the opposite two limbs to mirror the movement. Keep on alternating sides until you’ve managed 10 reps on each, aiming for three sets of 10 in total , or add the bicycle crunch into circuit training and just keep going for as long as the timer runs.1 Ara 2021

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