Hydration during Ramadan
With Ramadan being in summer, we tend to lose loads of water and electrolytes without the ability to replenish during the fasting hours. So it's important you do so after you break your fast.
Hydration becomes even more important if you plan on working out after iftar.
Make sure you drink about 1 liter of water, and at least a total of 2 to 3 liters during the non-fasting hours.
Dehydration will negatively impact your general health, increase water retention, decrease your athletic performance, slower down your recovery, and make you more prone to injury.
Also remember to stay away from sugary, carbonated and caffeinated drinks to prevent dehydration while you fast the following day.
Source: crossfitengine38.com