Drink a lot of water. It is important to hydrate your body before any long period of inactivity, says Alejandro Chabán, certified nutrition consultant and founder of the Yes You Can! Diet Plan — and the dry airplane atmosphere is particularly taxing. Drinking water before a trip hydrates your skin, oxygenates your muscles, and regulates your bodily fluids, alleviating swelling and liquid retention. Recycled air and pressurized cabins increase dehydration, so it’s recommended that you drink four to six ounces of water per hour in the air. A great bet is to bring an empty water bottle and fill it up post-security, just before the flight. If you get bored of water, try coconut water as an alternative. Coconut water hydrates faster than water, contains five essential electrolytes, and includes as much potassium as a banana. Another option is to drink a bottle or two of water (or coconut water) en route to the airport in case you fall asleep and forget to hydrate inflight!