Bicycle crunches are a great exercise for building core strength in runners – and are harder than they look. The exercise is a variation of an ab crunch, where one leg flexes while the other ...

You would do 10 crunches, 10 bicycle crunches ... perfect move for beginners who want to practice engaging their core. Stand up straight with your hands behind your head. Lift your right knee ...

Try a core workout that includes three different ab exercises, like crunches, bicycle crunches and lower leg lifts. You would do 10 crunches, 10 bicycle crunches, and then 10 lower lifts.

Bicycle crunches are a great exercise for building core strength in runners – and are harder than they look. The exercise is a variation of an ab crunch, where one leg flexes while the other extends.