in the 30-60 minutes before training to ensure that youre properly hydrated before you start. Once youre running, sip 150-200ml every 15 minutes. If youre still thirsty afterwards, or failed to drink during the session, another 400-800ml may be required.Joe
climes (or in hot working conditions in the UK) are still provided with salt tablets.For most runners, however, a sports drink should be adequate. Id suggest 200ml of an isotonic drink just prior to running and 200ml every 15-20 minutes during your run