7 Ways to Boost Your Metabolism!

Canadian researchers report that dieters with the most organochlorines (pollutants from pesticides, which are stored in fat cells) experience a greater than normal dip in metabolism as they lose weight, perhaps because the toxins interfere with the energy-burning process. Other research hints that pesticides can trigger weight gain. Always choose organic when buying peaches, apples, bell peppers, celery, nectarines, strawberries, cherries, lettuce, imported grapes, and pears; non-organic versions tend to have the highest levels of pesticides.

You're always looking for a way to shorten your workout, right? Well, step up your intensity and you'll burn the same number of calories or more in less time. In one Australian study, female volunteers either rode a stationary bike for 40 minutes at a steady pace or for 20 minutes of intervals, alternating eight seconds of sprints and 12 seconds of easy pedaling. After 15 weeks, those who incorporated the sprints into their cardio workouts had lost three times as much body fat—including thigh and core flab—compared with those who exercised at a steady pace. Bursts of speed may stimulate a fat-burning response within the muscles, says lead researcher Ethlyn Gail Trapp, Ph.D. Whether you ride, run, or row, try ramping things up to rev your burn: Start by doing three eight-second all-out, can't-talk sprints with 12 seconds at an easy pace between each effort. Work your way up until you can do 10 sprints over 20 minutes.

It’s no joke: genuine laughter may cause a 10–20 percent increase in basal energy expenditure and resting heart-rate, according to a study published in the International Journal of Obesity. That means a 10-15 minute giggle fest could burn up 40 to 170 calories. Let us hear you lol!