't prevent injuries or improve performance, so there's no reason to do it. The time to do your stretching is after your run, or even later in the evening." Stretch (without straining) your calves, quads and hamstrings for a total of 10 to 15 minutes. Expect a
the equivalent of eight large glasses of water every day, and probably twice that in warm weather. It also means taking in about half a pint of fluid every 15-20 minutes of running. For runs of an hour or more, you also need to replenish spent energy stores
