Exercise may reverse age-related bone loss

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Exercise may reverse age-related bone loss in middle-age

Men gradually lose bone mass as they age, which puts them at risk for developing osteoporosis, a condition that makes bones weak and prone to breakage. Nearly 2 million men in the U.S. have the condition, and 16 million more have low bone mass, studies have shown. Now, University of Missouri researchers have found that certain types of weight-lifting and jumping exercises, when completed for at least six months, improve bone density in active, healthy, middle-aged men with low bone mass. These exercises may help prevent osteoporosis by facilitating bone growth, according to the study published in Bone.

"Weight-lifting programs exist to increase muscular strength, but less research has examined what happens to bones during these types of exercises," said Pam Hinton, an associate professor and the director of nutritional sciences graduate studies in the MU Department of Nutrition and Exercise Physiology. "Our study is the first to show that exercise-based interventions work to increase bone density in middle-aged men with low bone mass who are otherwise healthy. These exercises could be prescribed to reverse bone loss associated with aging."

The researchers found the bone mass of the whole body and lumbar spine significantly increased after six months of completing the weight-lifting or jumping programs, and this increase was maintained at 12 months. Hip-bone density only increased among those who completed the weight-lifting program.

"Only the bone experiencing the mechanical load is going to get stronger, so we specifically chose exercises that would load the hip and the spine, which is why we had participants do squats, deadlifts, lunges and the overhead press," Hinton said. "Also, the intensity of the loading needs to increase over time to build strength. Both of the training programs gradually increased in intensity, and our participants also had rest weeks. Bones need to rest to continue to maximize the response."

"Individuals don't typically have to know they have heart disease, high blood pressure or prediabetes to start exercising - they do it as prevention," Hinton said. "Similarly, individuals don't have to know they have osteoporosis to start lifting weights. The interventions we studied are effective, safe and take 60-120 minutes per week to complete, which is feasible for most people. Also, the exercises can be done at home and require minimal exercise equipment, which adds to the ease of implementing and continuing these interventions."

University of Missouri-Columbia




















Exercise may reverse age-related bone loss

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