What are the three types of crunches?
The five very best include the classic crunch, reverse, bicycle, oblique, and vertical leg crunch. Each of these types of crunches is effective in targeting your upper and lower abdominal muscles. Similarly, they also help you reap other fitness benefits. For example, vertical leg crunches can help you blast belly fat.
How to do a crunch correctly?
What are the best crunches?
According to the study, the bicycle crunch was the most effective stomach exercise when analysing the muscle activity in the abdominals. To complete a bicycle crunch, lie on your back with your lower back pressed into the ground, bring your knees in towards your chest and lift your shoulder blades off the ground.