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 News SAHRC overseeing HIV patients' transfer to public health facilities Medical 7 reasons why your sinusitis could be worse in winter Lifestyle How skipping this much sleep makes arguing with your partner more dangerous Fitness Unlock your best performance with these 4 mindset tips Lifestyle SEE: How many people smoke around the world? Diet and nutrition Chef schools compete to produce tasty R15 lunch box From our sponsors Win a R1 500 hamper with Alpecin Hypertension Consumer Fact Sheet Understanding diabetes self-management WIN a R2000 Skin Renewal voucher! Live healthier Mental health & your work » How open are you about mental illness in the workplace? Mental health in the workplace – what you can do to help If you know that one of your colleagues suffers from a mental illness, would you be able to help them at work? Maligay Govender offers some helpful mental health "first aid" tips. Sleep & You » Sleep vs. no sleep Diagnosis of insomnia 6 things that are sabotaging your sleep Kick these shut-eye killers to the kerb and make your whole life better – overnight.