Add lemon (or other) juice and water until you reach 32oz or 4 cups.
Drink often immediately before, during or after you high intensity workout or hour+ long ride, run or workout!
Keep any remaining portion in the fridge for up to two weeks.
Notes
This is pretty dang close to Gatorade, but you just made it in 5 minutes for yourself! I've had athletes enjoy using pomegranate juice, lemon and lime juice, and orange juice. Make a big batch and keep it in the fridge for up to two weeks.