This is a great compound exercise for toning and strengthening the abdominals and core muscles. No special equipment is needed just floor pad.
To perform single leg crunches lie flat on your back with your feet spread out slightly wider than shoulder width, with your toes pointing upwards. Rest your arms flat against your stomach with your thumbs just touching each other.
Begin by raising the right leg off the ground, keeping it straight. Raise your heel so your leg is at an approximately 40-degree angle. At the same time roll your upper body into a crunch position towards your raised foot while keeping your lower back on the ground and simultaneously pointing both hands towards the raised foot in a 'touch your toes' movement. Maintain your foot in the same position and lower your upper body to the ground. Repeat for five repetitions and then switch legs. Keep your hands raised throughout the movement.