Hi! I am Michele Stanten, Fitness Director of Prevention Magazine.

The biggest threats to your metabolism in your 40s are stress and a lack of sleep. Those often accompany perimenopause, that period when your body is decreasing its production of estrogen, and your body is preparing to go into menopause. But you can fight both of these by adding some yoga to your workout.

I am going to show you two moves that are a great way to reduce your stress level and make sure you sleep better at night.

Roselyn is going to help me down and demonstrate here. The first move is the wagging downward dog. So what you want to do is you want to come on to your hands-and-knee, making sure that your wrist are directly beneath your shoulders, and your knee is directly beneath your head.

Now toes are tucked, press into your hands and lift your hips up to the celling, forming an inwarded V with your body. Good!

Now you are going to rise -- raise one leg up, nice, toe point it and you are going to circle it out and down back to the floor and come back up. Good! We are going to do three circles, nice, make sure you keep breathing and then let's reverse the direction. Keeping those abs nice and tight, good. And then bring the leg down.

Our next move is the sunbird.

Again we are going to start in knee, hands-and-knee position. Again, the wrist are directly beneath the shoulders, knee is directly beneath the hip. And we're going to begin by bringing one knee in toward to your chest, tucking your chin, good. Now extend it out, keeping the back nice and straight and look up.

You are extending the leg and the toes pointing you. You want to hold this position for about five seconds, and then bring that knee back in, tuck and extend. Good!

Let's do that one more time, keeping the abs nice and tight as you do this and feel that nice stress as you extend.

Remember, holding that position for about five seconds between the rest and you can relax, and making sure that you do each leg five time. And try practicing these yoga routine, after work or before bed to help you reduce your stress level and sleep better at night.