I hate to be a killjoy but am I the only one who prefers the weather slightly cooler when it comes to running? When I run in heat as we've got at the moment (ie up to mid 20's C) it just saps my energy and I feel incredibly lethargic. Hence the training suffers and whereas I love to be outdoors I end up running on the treadmill indoors (assuming the gym's air conditioning is working that is!) or just don't feel like it at all. My usual weekly mileage is about 20 miles so we're not talking great distances, but I am quite serious about it and wonder if it's just me?????????? I can't believe how when the weather warms up I see more runners about outdoors than ever!