According to a latest study, combining exercise and dieting might not be beneficial for bone health. The study was published in the Journal of Bone and Mineral Research. The researchers examined the bone marrow fat and overall bone health when one restricts calories. The animal study involved four groups of mice in all – a group on a regular diet (RD), a group on a calorie-restricted (CR) diet, a regular diet group that exercised, and a calorie-restricted group that exercised.
Mice in the calorie-restricted group were served 30% less food than the regular diet mice ate. It was found that mice in the calorie-restricted group lost weight, but also had an increase in bone marrow fat. In addition, this group also had a decrease in bone quantity — they had less bone overall due to cut in calories.
A 30% reduction would equal a diet of 1,400 calories per day, which is around the amount suggested to most women trying to lose weight at a rate of one pound a week.
Maya Styner, Associate Professor at University of North Carolina School of Medicine in the U.S. said “This is important for women because as we age our bone health starts to decline. Your calorie intake and exercise routine can have an impact on the strength of your bones and your risk for fracture”. “Looking at this from a human perspective, even a lower calorie diet that’s nutritionally sound can have negative effects on bone health, especially paired with exercise,” Styner concluded.
According to the United States Department of Agriculture, a ‘moderately active’ woman around the age of 30 should consume 2,000 calories per day.