By Jim Leffman & Rom Preston-Ellis New mums can boost the health of their babies by breastfeeding after exercise, a new study has revealed. Scientists have discovered that an intense workout increases levels of a hormone in their milk that protects babies against diabetes and regulates their metabolism. Many mums ask whether exercise affects the quality of their breast milk but until now there has no been a definitive answer with some women even worried their milk will sour if they exercise. Researcher Dr Trine Moholdt at the Norwegian University of Science and Technology (NTNU) said: “There a…