Your metabolic rate naturally continues to decline 5 percent each decade once you hit 40.3 Your resting metabolic rate (RMR) determines how many calories you just to survive. It is determined by a variety of chemical reactions inside your body. These reactions rely on your mitochondrial function and sodium-potassium pumps. Your mitochondria help to create energy, while your sodium-potassium pumps generate muscle contractions and nerve impulses.4,5,6,7,8 Both of these processes become less effective over the years and slow your metabolism.9,10 If you eat more than your RMR yet lead a sedentary life, you set yourself up for weight gain.
Very soon, I’ll stand up in front of the graduating class of my former high school and give the commencement speech. I’ll focus on the usual “work hard” and “follow your dream” themes, but, in reality, I just want to shout out to all those 17-year-olds — “have that ice cream cone, you’ll still fit into your skinny jeans tomorrow! ” Or “it’s OK to skip a workout, your muscle mass will help you bounce back!”

Changes in your activity levels are one of the main reasons that losing weight after 40 may be more challenging than before. Like many women, you may be putting others first and simply not finding time to exercise. You may also notice that your joints can no longer handle the same activities as before. However, a lack of exercise can lead to muscle loss and fat gain.
There appears to be a connection between estrogen and body weight regulation.  With lower estrogen levels, lab animals tend to eat more and be less physically active.  Levels that are too high or too low appear to lead to fat storage.  And, lower estrogen levels may also slow down your metabolic rate (the speed  at your body converts stored energy into working energy).
Your muscles are important for bone density, strength, and overall health. However, your body starts to lose muscle as you age. Building muscle can increase your metabolism and help you burn more calories at rest. Muscle also takes up less space than fat, so you can feel leaner and toned as you increase your muscle mass. Good options to increase your muscle mass include light weightlifting, body weight exercises, and Pilates.
Even if you’re eating reasonably well, you can still be in a calorie surplus. Whether you’re eating oversized portions, taking mindless bites while prepping family meals or grazing as part of a new work-from-home norm, all that noshing adds up. Tracking your food intake can be helpful. In one 24-week study, researchers found that time spent logging food intake was significantly linked to weight loss. If tracking your food (even with an app) sounds daunting, consider that by the end of the study, those who were still committed to tracking spent just 15 minutes a day doing it — about what you might spend scrolling through Facebook or Instagram.
Many women have trouble sleeping during menopause due to hot flashes, night sweats, stress and the other fun stuff that goes along with low estrogen levels.  Migraines anyone??  The bummer is poor sleep is linked to hunger and weight gain because of two more hormones:  ghrelin (the “feed me” hormone) and leptin (the “I’m full” hormone).  Here’s a short blog I wrote on that topic.  If you’re sleep deprived, these hormones get out of whack.
Exercise can actually increase your energy. Just three hours of exercise weekly can improve the health of menopausal women.35,36,37,38,39 You may be able to add aerobic exercise into your everyday life without even noticing it! Take a walk during lunch with your colleagues. Go for a bike ride with your family after dinner. Put some music on while cleaning the house and add some dance moves. Jump on an elliptical trainer or treadmill instead of sitting while watching your favorite show.
Your metabolic rate naturally continues to decline 5 percent each decade once you hit 40.3 Your resting metabolic rate (RMR) determines how many calories you just to survive. It is determined by a variety of chemical reactions inside your body. These reactions rely on your mitochondrial function and sodium-potassium pumps. Your mitochondria help to create energy, while your sodium-potassium pumps generate muscle contractions and nerve impulses.4,5,6,7,8 Both of these processes become less effective over the years and slow your metabolism.9,10 If you eat more than your RMR yet lead a sedentary life, you set yourself up for weight gain.

It's a myth that eating at night leads to weight gain, Palinksi-Wade points out; it's more about what you're eating at night that can be an issue when it comes to weight management. "Since most of us don’t have a salad for a midnight snack, if you find you tend to eat calorie-dense, high-sugar foods in the evening (like a bowl of ice cream) setting guidelines as to when to stop eating may help you to lose weight faster."
While quality zzz’s can become ever-elusive as you age from busy schedules, back pain, or menopausal symptoms like hot flashes or insomnia, getting enough sleep is an essential component to weight loss. A good night’s sleep actually burns calories! Plus, studies have shown a strong link between lack of sleep and over-eating the following day. This is because the hormones ghrelin and leptin are thrown out of whack when you don’t get enough sleep, leaving you feeling more hungry but less satiated at every meal, which leads to overeating.
Protein is incredibly important in repairing your tissues, building muscles, combating fat, balancing your hormones, and increasing your overall health and well-being.29 Healthy proteins include grass-fed beef, pork, lamb, organic pasture-raised poultry, wild-caught fish, and wild game. I purchase my meats from ButcherBox and my fish from Vital Choice. I drink a delicious smoothie using The Myers Way® Paleo Protein to meet my protein needs. It’s organic, gluten-free, sugar-free, dairy-free and sourced from non-GMO, hormone and antibiotic free, grass-fed beef with 21 grams of protein per serving. My new, limited-time-only Salted Caramel flavor has just released. It’s a great summertime treat that ups your protein without weighing you down with sugars.

There appears to be a connection between estrogen and body weight regulation.  With lower estrogen levels, lab animals tend to eat more and be less physically active.  Levels that are too high or too low appear to lead to fat storage.  And, lower estrogen levels may also slow down your metabolic rate (the speed  at your body converts stored energy into working energy).
If you were very active in your younger years, you may have had some injuries.  Like a spicy pepperoni pizza does after dinner, those injuries from your carefree days can come back to haunt you.  These ghosts of injuries past show up in the form of early arthritis, bone spurs, tighter muscles, pinched nerves, etc.  After our 30’s, new injuries also take longer heal.  No wonder we slow down.
While quality zzz’s can become ever-elusive as you age from busy schedules, back pain, or menopausal symptoms like hot flashes or insomnia, getting enough sleep is an essential component to weight loss. A good night’s sleep actually burns calories! Plus, studies have shown a strong link between lack of sleep and over-eating the following day. This is because the hormones ghrelin and leptin are thrown out of whack when you don’t get enough sleep, leaving you feeling more hungry but less satiated at every meal, which leads to overeating.
In your forties, your body may have an increasingly difficult time digesting carbohydrates, which may lead to weight gain. Living a stressful life can lead to an increase in the stress-hormone called cortisol, which can make you more prone to gaining belly fat. Estrogen loss may also lead to fat redistribution in your body and cause belly fat gain.11
Dina - WOW!! This is awesome news to hear! Just know that you are not alone in trying to be healthy after 40 or even after 50! You couldn't have said it better though when you said to maintain a better diet and exercise routine SLOWLY! I always tell my clients that it is a healthy lifestyle that you are looking towards living. In my mind there are no such things as quick fixes and to make these changes over time will lead to the overall lifestyle you are looking for. Congratulations to you and continue to make those slow consistent changes to your health! YES U CAN!
Healthy fats such as avocados, coconut oil, extra virgin olive oil, avocado oil, and ghee have a number of benefits. These include reducing the risk of heart attack, coronary artery disease, high cholesterol, high blood pressure, cancer, diabetes, and metabolic syndrome.23,24,25,26,27 They can keep you satisfied longer, reducing the risk of overeating and snacking. Healthy eating doesn’t mean deprivation! Healthy fats taste good and improve your brain health, and so may help you feel emotionally satisfied, lowering the risk of emotional eating.28
I am 59 and have been on a injury / weight gain cycle for several years. I have never been overweight till my first accident , then I gained weight and kept gaining and now that I am almost 60 , I want that great body and high energy back. The older I get the more problems my weight causes , legs hurt , falling asleep in my chair , I am too young for that. So I am eating better and boxing , which is a great workout . I plan to sky dive for my 60th next year.
One of the main culprits for weight gain is, of course, our hormones, which start to change right around the mid-30s and into the 40s. This change in hormones, less estrogen for women and less testosterone for men, cause the fat in our bodies fat to shift to the middle of the body while abandoning other areas of the body you could care less about. That's one reason you may get a little fluffier around the middle while other parts of you actually get smaller.
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