Rebounders are known as mini trampolines and trampolines use the same basic jumping motions and are made from similar materials, but are used for entirely different purposes. A trampoline is a recreational device that you can use for exercise, while rebounders are designed for specific exercise routines such as rebounding aerobics.
The large size of a trampoline makes it ideal for tumbling workouts and practicing stunts such as flips and handsprings. Rebounders, by contrast, don't allow space for practicing stunts. Instead, they're primarily used for aerobic exercise routines. You might jump up and down on your rebounder, practice jumping on and off in a modified box jump, or incorporate elements of aerobics by holding dumbbells as you run in place on the rebounder.
Size and Function
A rebounder is both narrower and lower to the ground than a standard trampoline. Rebounders vary in size, but are usually about two to four feet in diameter and only elevated one to two feet off the ground. Trampolines are usually three to four feet above the ground, and can be six or more feet wide. This significant size difference makes rebounders ideal for travel and gym-based workout classes. Standard trampolines, however, stay in one place.