A recent study found impressive results from a regimen of one-legged hopping exercises. A special 3D bone strength mapping revealed remarkable gains: These impressive results were obtained by 70-year-old men who would normally experience aging bone loss each year. The gains were from the impact with each hop delivering 2.7 to 3 times body weight ground resistance force (this indicates a significant enough hop to produce an impact of 2-3 times one’s body weight). While the study was done with men, I seen no reason why women would not achieve the same gains from brief single-legged daily hopping. Furthermore, I suspect one would obtain substantial benefits from one legged hopping even if they did not reach the high impact level used in this study. Here's their simple hopping program: • Over the course of several weeks, participants worked up to 50 single-legged hops a day • They hopped on the same leg each day • As they gained strength, the hops became multi- directional (10 up and down vertical, 10 to the front, 10 back, 10 each to right and left sides) • At the year's end hip cortical mass and trabecular density had increase substantially in both legs with greatest gains accrued in the hopping leg. Granted, these powered-up hops are not for everyone, but if you are feeling fit and decide to dial up your daily hopping routine, keep in mind these guidelines from the study: • Warm up before each session • Begin with very low hops and jump higher as you can over the weeks • Start with just a few one-legged hops a day and work up to 5 sets of 10 hops at a time • Resting between sets at least 15 seconds, walking in place a bit • Hold a chair for balance if necessary • As you get stronger make the hops multidirectional. This multi-directionality loads and strengthens different parts of the hip • As you gain strength, hop as high and as fast as you can Let me know your thoughts and your plan to keep hopping one way or another. References: Alison, Sarah. The influence the Hip-Hop of exercise on 3D distribution of cortical and a trabecular bone across the proximal femur: The Hip-Hop Study. ASBMR Abstract 1013, 2014 Annual Meeting, Houston, Tx Sept. 12, 2014. Allison, Sarah. High impact exercise increased femoral neck bone mineral density in older men: A randomized unilateral intervention. Bone, 53 (2013):321-328.