7 Ways to Boost Your Metabolism!

Caffeine is a central nervous system stimulant, so your daily java jolts can rev your metabolism 5 to 8%—about 98 to 174 calories a day. A cup of brewed tea can raise your metabolism by 12%, according to one Japanese study. Researchers believe the antioxidant catechins in tea provide the boost.

Every. Single. Day. If you don't, your body goes into starvation mode (it's paranoid like that), so your metabolism slows to a crawl to conserve energy, Berardi says. And the heartier your first meal is, the better. In one study published in the American Journal of Epidemiology, volunteers who got 22 to 55 percent of their total calories at breakfast gained only 1.7 pounds on average over four years. Those who ate zero to 11 percent of their calories in the morning gained nearly three pounds. In another study published in the same journal, volunteers who reported regularly skipping breakfast had 4.5 times the risk of obesity as those who took the time to eat.

Your body digests protein more slowly than fat or carbs, so you feel full longer (this is especially true when you have it for breakfast). Plus, it may also give your metabolism a bump. In a process called thermogenesis, your body uses about 10% of its calorie intake for digestion. So, because it takes longer to burn protein than carbs or fat, your body expends more energy absorbing the nutrients in a high-protein diet. Another bonus: One recent study from Purdue University found that diets higher in protein may help preserve lean body mass, which is the best fat-burner of all.

Even when you're at rest, your body is constantly burning calories. In fact, 75% of the calories that you burn each day are being used up just keeping you alive. “Resting metabolic rate” is much higher in people with more muscle, because every pound of muscle uses about 6 calories a day just to sustain itself. If you can pack on just five pounds of muscle and sustain it, you’ll burn the caloric equivalent of three pounds of fat over the course of a year.

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!