It may feel easy at first, but treading water for a longer time could get challenging. It is a simple yet effective exercise that involves all major muscle groups.
In this exercise, you will experience treading water without using floats. You will be moving your arms and legs to keep your body afloat.
Stand in the shallow-end with one leg bent in front and your shoulders in the water. Hold the dumbbells, in punching position, with both hands by your side.