How long should I do flutter kicks for?

Traditional flutter kick Hold for 2 seconds, then switch the position of the legs, making a flutter kick motion. For more of a challenge, lift your head and neck off the floor. Repeat this motion for up to 30 seconds .

Try to complete 2 or 3 sets of 15 to 20 repetitions or do 2 or 3, 30-second sets. For a modified and easier version of the flutter kicks exercise, keep your head on the mat, your arms by your sides and keep your knees slightly bent.