“The rebounder is otherwise known as the min-trampoline, and is my favorite form of exercise,” Dr. Gioffre says. NASA did a study showing that it was 68 percent more effective than running at improving cardiovascular health and weight loss. “Plus, they are inexpensive, healthy for people dealing with back pain, requires very little time, and can be done in the comfort of your own home.” For 12 minutes, do a gentle bounce with the balls of your feet staying on the rebounder at all times, he adds. Then feel free to bounce up and down to alkalize your body and increase your heart rate.