Sure, you can lose weight quickly. There are plenty of fad diets that work to shed pounds rapidly -- while leaving you feeling hungry and deprived. But what good is losing weight only to regain it? To keep pounds off permanently, it's best to lose weight slowly. And many experts say you can do that without going on a "diet." Instead, the key is making simple tweaks to your lifestyle.
The number one training method the experts turn to again and again for weight loss: interval training. What's that? "Any form of exercise where your heart rate spikes and then comes down repeatedly," says Rilinger. This generally means going hard for a set interval of time (hence the name), followed by active rest, then going hard again. That active recovery portion is key. You need to take it down a notch—OK, several notches—before ramping back up to a higher intensity interval.