Current evidence strongly suggests that moderate to intense physical activity can reduce the risk of heart disease, stroke, diabetes, and various forms of cancer, and it may even improve longevity overall. However, prolonged, intense physical exercise can have negative effects on the immune system. A new study finds that consuming carbs (such as a banana, for example) during or immediately after exercise reduces exercise-related immunodepression and helps the body to recover, particularly for those who undertake high-intensity activity for sessions of 90 minutes or more. Journal of Applied Physiology, March 2017