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We’ve all been there: You promise yourself that this time it’s going to stick; you’re going to get in shape, and stay in shape, no ifs, ands, or buts. And for the first few weeks, you’re pretty proud of yourself. You’re waking up early and heading to the gym, or going straight after work, your running shoes tucked in your bag. You do your 15 minutes of cardio and your 30 minutes of free weights. You swim, you do yoga, and you take a class that makes your body burn in all the right ways. And then something happens — a schedule snag, a crazy week, the season premiere of your favorite show that you just can’t miss.

You fall out of your pattern, sometimes just for a day, and the whole routine comes crumbling down.

Unless you have some serious discipline or a charming and persuasive workout buddy, it can be shockingly easy to lose your momentum. And suddenly you find yourself exactly where you were the December of the year before: a little soft, a little sad about it, and more than a little envious of your supertfit co­worker.

So how can you re­ignite your fitness fire after letting it flame out?

They say sex sells, and in this case it’s true (and this is one instance where I actually support it).

Not only will you feel and look more confident and sexy if you stay on top of your fitness routine, you’ll be a better lover when you’re active on a regular basis. (And working out can even restore your libido if you find that going soft too.)

“There is a proven direct link between sex and exercise,” says Dr. Jennifer Landa. “When you exercise, the brain produces endorphins that stimulate the release of sex hormones. These hormones reduce your heart rate, improve digestion, lower blood pressure and cortisol levels, and relax the body. Oh, and you also might just feel primed and ready for a little one­-on-­one time in the bedroom.”

Not only will you feel primed for that one­-on-­one time, your workouts will help you maintain your bedroom stamina, and even allow you to get more creative with a variety of positions.

For guys with erectile dysfunction, exercise can prove to be a huge benefit as well. ED is usually the offshoot of a circulatory problem, and staying active not only keeps your overall vascular system healthy, it ensures that the muscle downstairs is working like you want it to, when you want it to.

For the ladies, exercise also enhances arousal and increases sensitivity to touch, both of which mean greater satisfaction in the bedroom.

So the next time you’re struggling to work up the motivation to get off the couch just because it’s good for you, imagine the look on your partner’s face when you surprise them with your next­-level prowess in the boudoir.

But don’t just take my word for it — make it real for yourself. A powerful way to put something into action is to visualize it in detail and then write those details down. Imagine the kind of lover you want to be for your current or future partner as vividly as possible. Write down those specifics and keep them handy for yourself so you can refer to them when you need a little nudge to get going.

Every time you head out the door for a workout, you’re not just supporting your overall wellness, you’re one step closer to being that lover worth bragging about.

So keep it up. You can thank me later.