Before you hit the road, make sure you're packing these key staples: a watch to log your total time (or a fancy GPS to track your mileage), an iPod with great amp-you-up music, a cell phone if you don't mind holding onto it, and a RoadID (a bracelet that includes all your vital info, $20; And on a sunny day, wear sunglasses. "They reduce glare, which can decrease squinting, ultimately releasing the tension in your shoulders," says Andrew Kastor. And that's a performance bonus, because relaxing them helps conserve energy on your runs. Hey, we'll take a boost where we can get it!

Ranging from just-juice to just-tea cleanses, these typically short-term plans can be dangerous. “Detoxes and cleanses are usually low in calories, protein, and fiber, all nutrients that our bodies need to function,” says Alissa Rumsey, RD, who is in private practice in New York City. “These plans leave you feeling hungry and cranky, causing a rebound food binge once you stop the detox.”
In terms of weight loss, you may be interested in trying the ketogenic diet because you’ve heard that it can make a big impact right away. And that’s true. “Ketogenic diets will cause you to lose weight within the first week,” says Mattinson. She explains that your body will first use up all of its glycogen stores (the storage form of carbohydrate). With depleted glycogen, you’ll drop water weight. While it can be motivating to see the number on the scale go down (often dramatically), do keep in mind that most of this is water loss initially.
If you eat fewer calories than you burn, you'll lose weight. But when you're hungry all the time, eating fewer calories can be a challenge. "Studies show people who eat 4-5 meals or snacks per day are better able to control their appetite and weight," says obesity researcher Rebecca Reeves, DrPH, RD. She recommends dividing your daily calories into smaller meals or snacks and enjoying most of them earlier in the day -- dinner should be the last time you eat.