Remaining well-hydrated while exercising is best.
• The best fluid to have before exercise mainly if one is planning to be active for an hour or less is water. In case, if one is planning to exercise for longer duration than sports drink is to be taken before exercising.
• It is important to remain hydrated as water helps to fuel the muscles, therefore, consuming water after, during and before exercise will boost the levels of energy, and may even help in inhibiting cramp.
• It is generally recommended to have 8 ounces of water before 20 to 30 minutes of exercise.
Thus, option D is correct.
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