I take them prior to, while exercising, and following the session. I aim to have a meal roughly sixty minutes ahead of training. I add a high-carb powder to my water bottle and sip it en route, throughout the workout, and any remainder afterwards. I follow the same approach for cycling, though that often involves several bottles plus solid food on longer rides.
Do you take them before training, afterwards, or split across both? I tend to go with after the session because having food beforehand leaves me feeling drowsy.