Home > Fitness > Sport Sport All sections in Fitness » Exercise » Getting started » In the gym » Lifestages » Sport » Sports injuries » Running » Rugby » Walking » Cricket » Soccer » Cycling » Sports nutrition Human endurance may have its limits, and our digestive capability could be the reason In grueling physical activities that last for days, weeks and months, humans can only burn calories at 2.5 times their resting metabolic rate. Not even the fastest ultra-marathoners can best that limit. take a Flexibility test » Receive Health tips » Ask Fitness Expert » Join Health24 on Facebook » 10 minute bikini-ready workout Why you need strength to run 9 ‘healthy’ foods that can ruin your running Beware of these diet downfalls that can sabotage your health and your running. Brain changes found in kids after one season of football A recent study found associations between the amount of exposure to head impacts and the amount of change in the brain in competitive football. How to choose the best sport supplements Before you jump into sports supplementation, weigh up the cost of the supposed benefits with the risks. How to walk off 5 kg Getting bored with your current exercise plan? Here’s a weekly plan to help you walk off those excess kilos. Researchers show fat isn't necessary for marathons Muscles prefer carbohydrates as their fuel source during high-intensity, long-duration runs, a new study has found. Boxing injuries more severe than in mixed martial arts Mixed martial arts fighters were more likely than boxers to suffer an injury during their bouts, but most of those injuries were minor, such as cuts and bruises. Will Smith highlights concussions in football with new movie The world is wisening up to the debilitating and often deadly health problems players face when they sustain concussions in contact sport. Will Smith's new movie Concussion, shines the light brightly on the dangers. Health24 tries Skechers Go Flex Walk Health24's editor Laura tries a pair of Skechers GO FLEX Walk shoes and finds they are quite the comfy fit. 10 tips on diving survival As with all leisure sports, diving has its dangers, and those who participate in diving should always take extra care. load more articles advertisement Live healthier Heart health » 5 women share exactly what it feels like to have a heart attack 'I felt like I had a pill stuck in my throat.' Diet & Nutrition » 8 benefits of gherkin juice that will make you want to drink some ASAP Goodbye, salt craving.