Here's the best time of day to work out to lose weight

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You've committed to squeezing in a workout between your commute and your desk job, but before you embark on this new regimen, you want to know: When's the best time to exercise to ensure you're getting the most out of it?

Research covered by Gretchen Reynolds in The New York Times suggests that working out early in the morning — before you've eaten breakfast — helps speed weight loss and boost energy levels by priming the body for an all-day fat burn.

Photos below of celebrities taking sexy snaps at the gym:

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Here's the best time of day to work out to lose weight
Be a #supermomma multitasker by mixing playtime into your #workout! Today on MollySims .com, I’m showing you 5 moves to make mommy & me exercise fun! πŸ’ͺπŸ»πŸ’¦#mommyandme #mollysims @whiteandwarren @underarmour {link in profile}
That post workout face where you give as little effort as possible due to fatigue. *In the background sits the worlds most powerful subwoofer. Why? 'Cause at times I'm certifiably crazy, but then again aren't we all. #GoodMorningFromIronParadise #WhereCrazyMeetsGreatness #EveryDayOfTheWeek πŸ‘ŠπŸΎπŸ”₯
Work play work play
I'm not in the mood today.😝 Trying to motivate myself.
What a view! πŸ’ͺπŸ»πŸ’¦ @TheRanchMalibu, @FSWestlake, #TheRanch4.0 #TheRanchAtLiveOakMalibu ❀️❀️
Let's go @_hollyholm #jkjkjkjkjkjkjkjkjkjkjkjljkjkjkjkjkjk
Spent the morning #takingCareOfUs.
Laser focus #fitness #gymtime @infightingburnaby
we're no ballerinas.. but we try πŸ‘― rp @devwindsor #trainlikeanangel @balletbeautiful #vsfashionshow2015 πŸ’ͺ🏼
Always a good sweat @prevail_los_angeles πŸ‘ŠπŸΌ
On my 3am workouts again #teamtyson #tysonbeckford #nike #Beardgang #abs #chest #wardog
MONDAY morning madness.
Miss @tracydawnhall and I - AM πŸš΄πŸΎπŸ’¦πŸ’¨ w @SpinGalNichelle @cyclehousela
#fitnessfriday πŸ‘ŠπŸΌ
Sometimes you have to work your baby into your workout...but that's ok because the world is your playground! #MonkeyBars #WorkoutAnywhere @caliabycarrie #StayThePath
Me acting like i didnt see the camera yesterday during my workout...look good ,feel good now it's time to play good. let's get back on track 2nite #heatnation
Friday.
Working out on Monday? It's a stretch πŸ˜‰
Getting my "Flagpole" game together....I'm still a work in progress but I like my progression!!!! #HustleHart #Motivation #healthiswealth #CoreStrength #SundayFunday
Still standing!!!! A big thanks to @underarmour for the sick uniforms for me and my teammates!!!!
Thanks for kicking my butt today Justin @modelfitbyjustingelband
Its not easy being green... or drinking a gallon of water a day... or doing an impromptu photoshoot in your new workout clothes πŸ’ƒπŸ’ͺπŸ‘€β€πŸ’šπŸ’›πŸ’œ Thanks @sformes #3Six5 @3six5sport #BeingMar yJane #AMeyersChristmas #43
It's Workout Wednesday!! #workoutwednesday LOVE this move @pg13fit butt, hamstrings, quad & triceps! 10 x each leg...Kick at the end optional 😜 1-2-3...GO #healthyliving #fitspo #fitfam #workout @pinkboxstudio thx for the tank! #badass
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The no-snooze payoff

One of the reasons working out first thing in the morning helps us lose weight — or at least protects us from gaining it — is that it pushes the body to tap into its fat reserves for fuel, as opposed to simply "burning off" our most recent snack or meal.

In one recent study, 28 young, healthy men spent six weeks eating a hefty diet of 30% more calories and 50% more fat than they had been eating before. But while some of them spent the six weeks stuffing themselves and barely exercising, the others started working out every day. Of those who worked out, half did so first thing in the morning; the other half hit the gym (and did the same workout) after a high-carb breakfast. The fasting exercisers ate the same breakfast; they just did so after working out.

At the end of the volunteers' month-and-a-half eating fest, the ones who hadn't worked out at all had, unsurprisingly, packed on the weight — about 6 pounds each. The ones who had been exercising after breakfast gained weight, too, but only about half as much.

In comparison, the people who worked out daily but hit the gym before breakfast hadn't gained any weight at all. They had been able to eat a lot of extra food — just as much as their fellow volunteers — without paying the price in additional pounds.

The study was small, short term, used a specific eating plan, and involved only men close to age 21, so it's hard to extrapolate much from the results. And the fasting exercisers didn't lose weight; they just didn't gain weight. Still, the experiment provided some of the first evidence that "early morning exercise in the fasted state is more potent than an identical amount of exercise in the fed state," the authors write.

Another smaller study helps point out why timing could be so important. In it, two groups of men ran on treadmills until they burned 400 calories (about the equivalent of a small meal, or three to four slices of toast). While one group ran on an empty stomach, the other ate a 400-calorie oatmeal breakfast about an hour before their workout.

All of the runners burned fat during their workouts and remained in a heightened fat-burning state after they had gotten off their treadmills. But both results were more intense for the runners who had skipped the oatmeal. In other words, exercising after a long period of not eating could be setting us up for a longer, more intense fat burn.

Set your clocks

Another component of the early-morning workout regimen can help with weight loss: daylight.

Aligning our internal clocks, or circadian rhythms, with the natural world helps give our metabolisms a boost. One recent study showed that people who basked in bright sunlight within two hours after waking tended to be thinner and better able to manage their weight than people who didn't get any natural light, regardless of what they ate throughout the day.

So next time you think about hitting snooze, remember this: An early-morning workout might not just help you meet your fitness goals, but it could even give you more energy than those few extra minutes of shut-eye.

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