Exercise Physiologist, Massage Therapist
There's a bit of mixed evidence on this thus far. The typical advice given in this area is water is acceptable for hydration for activities up to 60-90 mins; after that sports drinks may be warranted. This may not however be necessary. Prof Tim Noakes has researched the subject extensively and basically believes sports drinks are money making gimmicks (have a look at his work on overhydration). Evidence aside, you need to consider whether you can afford the additional calories in sports drinks- they can sometimes be counter productive in your weight control efforts; as well as the additional cost of sports drinks vs water.
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to your account or now (it's free).Dietitian, Nutritionist, Sports Dietitian
If you are a regular gym goer than water is more than enough to keep you hydrated. Sports drinks are designed to assist elite athletes with their rehydration during events lasting more than 90mins.
If you are aiming at bulking up, you could have a sports drink on hand during a session to give you the carbohydrates you need, but if your goal is to lose a bit of body fat, than I would suggest water.
For more expert advice, visit your local Accredited Practising Dietitian (APD), you can find one at www.daa.asn.au
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