Two weeks doesn’t give you much time to trigger noticeable changes in your body. To negate the time factor, you’ll be condensing the work schedule. Over the next 14 days, you’ll put in 12 total workouts, with two rest days built in. The increased frequency of workouts will up the number of calories you’re burning over the course of the program. By keeping repair and recovery constant between workouts, you’ll have your metabolism working overtime to keep up. This type of schedule is not sustainable in the long term, but you’ll find that your body can do almost anything for a two-week block, often with positive results.
In order to produce the desired results, you’re going to have to submit to a slightly less academic—but utterly more chaotic—method of training. While most programs carefully manipulate a multitude of variables, we’re going to whittle that list down to those that are most conducive to fat loss and muscle preservation. It’s going to be tough, but it’s going to work.
In what is perhaps the biggest buzzkill of all time, sex doesn’t quite count as cardio or burn a significant amount of calories: Women burn about 3.6 per minute. "It’s still a good idea," Dr. Seltzer says, citing the activity’s other benefits, like increasing the output of the neurotransmitters serotonin and dopamine, which naturally reduce food cravings.
Here's something else most people probably don't know: Fidgeting is good for you. It's considered a nonexercise physical activity, and it's an important way to burn energy. You get more health benefits if, in addition to exercising, you are a more fidgety, more active person the rest of the day. This means gesturing while you're talking, tapping your foot, just moving around.