
Fast-Working Capsule: Hi-Lyte Electrolyte Replacement.Best for Women Who Run Long: Osmo Active Hydration for Women.Best for Short Runs: Science in Sport Go Hydro.A Better Gatorade Mix: Gatorade Endurance Formula.

Best All-Arounder: Nuun Sport Hydration Tablets.Below are our favorites, plus what to know before you buy. Some of them are even pretty tasty, making drinking plenty of water a little easier, as well. The good news is that there are dozens of drink tablets designed to replenish lost electrolytes fast, so you’ll feel recharged after a run instead of headachy and lethargic.

For runners, common signs of an electrolyte imbalance include dizziness, nausea, cramping, and fatigue, though more serious consequences are possible in extreme cases. Typically, it’s not hard to get enough electrolytes from our food, but when we’re sweating a lot during activity-particularly in hot weather, for longer than an hour-we can lose more than we’re taking in. Electrolytes are particles that conduct electricity in water, and they’re vital for normal human body function. If running in the summer leaves you feeling drained and depleted for the rest of the day, like you just sweat out your last remaining brain cell, there’s a good chance you need to take in more electrolytes.
