Home > Newsletters > Daily: Love or hate Earth Hour? > Daily Dose: This is why your vanilla or cinnamon flavoured e-cigarette is toxic > Health-in-Motion 18 July 2017 There is such a thing as too much of a good thing There is such a thing as too much of a good thing, certainly in the case of doing exercise. A recent review of published data demonstrates that folks who exercise excessively – for instance by running or working out in hot conditions for more than two hours at 60% VO2max – put their health at risk. Increasing the duration and intensity of exercise may result in damage to the cells of the intestine, causing leaks that allow pathogens to enter the bloodstream and cause acute or chronic health problems. 0 More: Daily Dose: This is why your vanilla or cinnamon flavoured e-cigarette is toxicHealth-in-Motion advertisement Other news Fitness Use this workout plan to master the superman push-up in under a month Diet and nutrition 8 prebiotic foods you should probably add to your diet News Good Sex? Bad Sex? Rad Sex? Sex Can you really get an STD from kissing? Fitness 4 amazing body benefits of weightlifting that’ll persuade you to give it a try Lifestyle Where snakebites are deadliest From our sponsors Tell-tale signs you need a mattress upgrade Keen to win a R2 000 voucher? Good health begins in your gastrointestinal tract ACC 200 works fast to break down mucus Live healthier Contraceptives and you » Scientists create new contraceptive from seaweed Poor long-term birth control training leads to 'accidents' 7 birth control myths you should stop believing Will the Pill make you gain weight? Can you fall pregnant while breastfeeding? We bust seven common myths about birth control. Your digestive health » Causes of digestive disorders 9 habits that could hurt your digestive system Your tummy rumblings might help diagnose bowel disorder With the assistance of an 'acoustic belt', doctors can now determine the cause of your tummy troubles.