This crunch focusses the effort on the lower abs. Lie flat on the floor, hands flat by your sides to stabilise. With bent legs, bring your knees towards your chest, slowly with control. Slowly down as you straighten your legs, and repeat. Don't let your heels touch the floor - keep tension the whole time.
Fit Media is the largest independent fitness channel on YouTube with over 1.9 million subscribers. We provide expert training tips and workouts from the world's best personal trainers.
The Fit Media Workout App has training plans you can follow and all the tools you need to track your progress in the gym.
Established in 2011, we've been a source of expert workout information for over a decade.
