As we age, it’s common to lose both muscle mass and bone density—two factors that can contribute to injury in older adults. And while most of us already know that strength training can help build up our muscles to prevent that problem, fewer know how to help build bone density to achieve the same aim.

The good news is that experts have an answer: It turns out that jumping exercises are considered best for building stronger bones. The key, they say, is to hit the pavement with a certain amount of “ground reaction force,” helping to stimulate bone growth. For those new to the concept, this is the equal and opposite force our bodies receive from the ground as we bring our weight down upon it.

“Lots of people have questions about how hard they have to jump to stimulate formation of new bone,

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