Boys showed a greater level of total physical and vigorous activity than girls, which may account for their higher bone densities. These findings suggest that exercise, or even mild physical activity, may increase bone density in children. Do your best to control the number of hours your children spend in front of the tube, and encourage them to be physically active whenever possible. Janz KF, Burns TL, Tomer JC, et al. If you've ever walked through a department or grocery store while employees were stocking shelves or moving supplies, you've probably witnessed a back belt in action.
Many employers recommend or require back belts to reduce employee injuries and injury claims.
Results showed that neither frequent back belt use nor a store policy requiring such use had any significant effect on back injury claim rates or self-reported back pain. In 1998, a U.S. Bureau of Labor Statistics survey revealed that Americans suffered nearly 300,000 back injuries due to overexertion, and resulting in lost workdays. As this study shows, back belts probably aren't the answer to this growing problem. KWassell JT, Gardner LI, Landsittel DP, et al. A prospective study on back belts for prevention of back pain and injury.