"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." HYDRATION SHOULD BE easy. After all, you're just giving your body what if often wants most in water.

Whether hiking on nature trails or around a city, spending even an hour with a 1-liter water bottle in the side pocket of a backpack can make your back ache. It puts stress on your left or right ...

I used to think the best hydration packs were only for serious ultrarunners—the kind of people who sign up for 100-mile races and run with poles—but in the past few years, hydration packs are ...

Seventy-five percent of Americans are chronically dehydrated. I’m a hiking guide in Alaska, and I’m constantly stopping on my hikes to encourage my guests to drink water. I always rely on a hydration ...

Keeping yourself hydrated is one of the most important parts of any physical activity. When you’re outside and on the go, it’s not always possible or practical to carry a traditional water bottle. In ...

Want more tried and tested recommendations from the RW editors? Sign up to our new weekly newsletter Kit Bag. Click here to subscribe. Whether you’re training for a marathon, tackling your first ultra ...