Good exercises to reduce waist size are waist turns, quick squats and bicycle exercises, according to Med-Health.net. Fitness experts suggest supplementing these exercises with cardio exercises for the best workout.
Waist turns require a long pole that the exerciser places across the shoulders behind the neck. The exerciser then drapes his arms over the pole with his back kept straight and rotates his waist from left to right for up to 50 rotations.
Med-Health.net also recommends doing 100 squats in five minutes to reduce waist size. Exercisers can hold dumbbells during the squats to increase the intensity of the workout.
To do bicycle exercises, individuals lie on their backs, move their legs like they are riding a bicycle, and touch their elbows to alternating knees.