Home > Newsletters > Daily: Love or hate Earth Hour? > Daily Dose: Poo now in pill form to treat gut infection > Health-in-Motion 03 February 2017 Heading a soccer ball may not be as harmless as it first seems Heading a soccer ball may not be as harmless as it first seems. British scientists got soccer players to head a ball fired from a machine designed to simulate a corner kick 20 times in a row, testing their brain function before and after the experiment. The outcomes suggest small changes in brain function even after a single session with memory test performance dropping by between 41% and 67%. The effects normalised within 24 hours and it is unclear whether any changes would remain temporary after repeated heading sessions. 0 More: Daily Dose: Poo now in pill form to treat gut infectionHealth-in-Motion advertisement Other news Lifestyle Oil foils: your skin-care guide for acne-prone skin Medical SEE: How long should a cough last? Medical Colonoscopy myths busted News Health24 Health Challenge: Week 33 Medical Two more arrests for ARV theft at Kanyamazane Clinic Medical SEE: How anaphylactic shock affects your body From our sponsors How to care for your vaginal flora Live healthier Hello? » SEE: Interesting facts about hearing loss Earworms: Let it go Is it bad to sleep with earplugs all the time? SEE: Do women hear better than men? The reason why men often appear not to be listening could be because they actually can't hear you. Confident smile? » Acidic drinks can harm your kids' smiles The facts on bleaching your teeth Am I taking good care of my teeth? Why are my teeth stained? We know the rules – brush your teeth twice a day and floss to keep them healthy. But, have you ever wondered what causes those stains that sometimes appear?