Another side effect of air pollution: earlier lactic-acid burn

Even relatively low levels of air pollution can inhibit your performance. When you run in cities that have high amounts of air pollution, the carbon monoxide you inhale may displace the oxygen you need. This may produce lactic acid sooner than normal, making you feel the burn earlier in your workout.

A vitamin for GI woes
Researchers asked a group of runners to take 1,000 IU of vitamin E for two weeks leading up to a marathon, while another group took a placebo. After the race, fewer of those who took the vitamin had abdominal cramps or bleeding compared to those who took the placebo. The researchers suspect that the vitamin's natural antioxidant role may combat the free radicals thought to cause GI symptoms during running.

Save your kids' shoulders
If your children complain of aching shoulders, necks or backs or have noticeable posture problems, the backpacks they carry to school may be too heavy. The weight of the pack should be no more than 15 percent of your child's body weight. For example, a 50-pound child should carry a pack that weighs no more than 7.5 pounds. Look for packs with padded straps and try to get your child to wear the straps on both shoulders, rather than just one.

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