It is most needed between 10 a.m. and 4 p.m. and should be applied 30 minutes before going outside. The higher the SPF rating, the better. but since you went out at 11:00 and the sun really starts to come out at 12:00 then i would say 11:30 at the latest.
During exercise, the main way the body maintains optimal body temperature is by sweating. ... Drinking fluid during exercise is necessary to replace fluids lost in sweat. This action will reduce the risk of heat stress, maintain normal muscle function, and prevent performance decreases due to dehydration.
