Exercise Prevents Osteoporosis

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DiSilvestro et al., 2007, conducted an 8-week study; examining increased micronutrient intake in young adult women would enhance exercise-induced changes in bone metabolism that could lower the risk of osteoporosis later in life. Subjects were 24 female students 18-24 years old that were overall healthy and assigned to either the PG (Placebo group, n=12) or MG (micronutrient group, n=12). Fasting blood and urine samples were taken before and after the 8-week study to determine changes in: 25-OH-vitamin D, parathyroid hormone (PTH), bone specific alkaline phosphatase (BAP), Urine deoxypyridinoline (DPD) and helical peptide (AHP). A resistance exercise program consisting of: (3 sets/8-12 reps) bench press, bicep curl, shoulder press, seated row, leg extensions, hamstring curl, (1 set/failure) calf raises and abdominal crunches were conducted 3 d/wk for the 8-week study. The researchers compared the PG to the MG by paired t-test using Excel with a p<0.05 significance and found the MG had a statistically significant decrease in DPD and AHP, which is an indication of bone degradation; BAP used for bone synthesis and reduced bone turnover that compromises bone strength, and PTH that stimulates bone resorption. There was an increase in 25-OH-vitamin D that helps control calcium and phosphate levels in the body used in increasing bone mineral density (BMD). It was further stated by the researchers that micronutrient supplementation plus exercise has beneficial effects in altering bone turnover markers reducing the risk of osteoporosis.

A study by Maimoun et al., 2007, examined 13 healthy individuals (9 women and 4 men) aged 69-79 years old in an 8-week experimental study to test the effects of antioxidant supplementation with aerobic tr...

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