Amy Roberts, CPT, personal trainer and fitness writer in New York City. She is certified as a personal trainer by the National Academy of Sports Medicine (NASM), as a group fitness instructor by the American Council on Exercise (ACE) and as a running coach by the USA Track and Field (USATF) and the Road Runners Club of America (RRCA).
Research shows that daily bouts of jumping not only reverses bone density loss but can improve it.
