We usually think of trampolines as a fun outdoor amusement item for children. In fact, trampolines provide fantastic exercise through their ability to sustain target heart rates while remaining gentle to joints.Rebounders – also known as “mini trampolines” – have been popular for many years, both for high-aerobic fitness and for bouncing fun. Rebounding is a unique exercise in that you achieve a weightless state at the top of each jump then land with twice the force of gravity on each bounce.Re.