Why Diets Fail After 40: The 60% Rule That Finally Works

Sustainable weight loss for women over 40 doesn't require 100% commitment. Or even 80%. If you keep starting strict diets and quitting shortly after, this episode covers why weight loss over 40 keeps stalling, and what lasts instead.

You know the all-in version by heart: calories cut, carbs gone, sugar gone, every meal cooked at home, no dinners out. It lasts for 3 or 4 weeks, and then one restaurant meal or a planned trip unravels the entire month. This episode walks through a different way to lose weight after 40, one built to survive dinners out, a full calendar, and a full life, and why the slower approach is the one that finally sticks through perimenopause and beyond.

In this episode:

• What a major UCLA review of 31 diet studies found about who ends up heavier
• The one number that makes weight loss for women over 40 fit the life you already have
• What a realistic week looks like with wine, restaurants, and a busy schedule still in it
• The first 2 habits to start with if you're starting from zero
• The all-or-nothing pull I still catch myself fighting on every vacation, 10 years in

Resources Mentioned:

💪🏼 The Strong Core Method: my 4-week at-home core program for women over 40, built for EVERY level, even if you've never worked out a day in your life. 12 guided workouts per level with video demos, 20 minutes, 3 times a week, to build a stronger, more defined midsection.

📝 Grab the FREE Fat Loss Formula Workbook to calculate your exact calorie deficit and maintenance numbers.

🎯 Take the FREE 'What's My Metabolism Type' Quiz to identify your unique metabolism type and get a personalized plan to manage your weight confidently.

💌 Stay connected: join my BTB Newsletter for weekly insights.

🎧 Listen Next: Food Noise: Why You Can't Stop Thinking About Food After 40

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👋🏻 ABOUT ME:

I'm Andrea, a double-certified NASM Nutrition and Fitness Coach and founder of Behind the Body. For 20 years, I under-ate, avoided weights, and lived on cardio chasing skinny, and none of it gave me a body I was proud of. In my mid-30s, I changed my approach: more protein, real strength training, and a plan that fit my life. I lost 20 pounds, and 10 years later, at 45, I'm still maintaining it through perimenopause. I help women over 40 simplify their approach, build real strength, and get results that last. Every week, I cover the science, the strategy, and the honest truth about fat loss and maintenance for women over 40.

MEDICAL DISCLAIMER:

This content is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making changes to your diet, exercise, or health routine. Results vary. Andrea is a NASM-certified Nutrition and Fitness Coach, not a doctor or registered dietitian.

Transcript

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I'm Andrea and welcome to Behind the Body. If you're over 40 and trying to lose fat, build muscle, or take better care of your health, you're in the right place. Every week we'll tackle the questions women over 40 are asking about nutrition, fitness, metabolism, and aging, helping you spend less time doing what doesn't move the needle and more time focusing on what does without the extremes or the all or nothing mindset. There are probably a million reasons that you can think of as to why you can't stick to your diet. But in reality, all of those things boil down to just one thing. And that is putting in more effort than you can sustain long term. Going 100% all in on weight loss almost guarantees that your diet will eventually fail and that you'll end up right back where you started. Most of us start a diet the same way every time. We're ready to commit to a plan. So we cut calories, cut out carbs, no more sugar, every meal is cooked at home, no eating out. You think you can do it, and it lasts for three, maybe four weeks, and then you have a dinner out, or you go to a social event, and you've totally derailed. And within a few days, you're eating the way you did before, plus now feeling guilty on top of it. You only have to get your diet right about 60% of the time to lose weight after 40 and to keep it off. Here's why the all-in approach basically guarantees that you'll fail the diet, why the sweet spot is 60%, and exactly what 60% looks like in a normal average week. And in case you're new here, I'm Andrea. And if you're wondering how I know what I'm talking about, this 60% strategy is the exact way that I lost 20 pounds in my mid to late 30s, and I've kept it off now for 10 years through perimenopause, and I'm a double certified fitness and nutrition coach. Let's start with why going 100% is a failing approach, because contrary to what you may believe, it's not a matter of how much willpower or discipline you have. When you cut calories, you cut carbs, you cut sugar, cook every single meal at home, and cancel basically every dinner out all at once over a short time span, you're making all of these changes, implementing all of these rules, and you build pressure. The longer a food is off limits, the louder the food noise and hyperfixation on food get in your head. And not only does it not fade with time, but it compounds. So that's why you end up in a situation like this. Maybe a month into doing so well on your diet, you finally go out to dinner. And then the bread basket lands on the table. Your diet so far has been little to no bread, but a month of no carbs has you so depleted that giving yourself permission to have just one piece turns into having very little self-control and eating the entire basket. And then, since the bread already ruined your diet that night, you might as well order a heavier entree and then maybe stop at McDonald's for a McFlurry on the way home for a little sweet treat. And then, if that's not enough, because you already have let the whole night go, you're rummaging through your pantry at 10 p.m. to find a little snack before you go to bed, and you're not even hungry. I've had this exact spiral play out in my own life, and I've seen it in my friends and my clients more times than I can count. But it never starts with the bread basket. It starts a month earlier, the day you decided you had to cut out everything and be perfect on your diet. This is why diets fail over time. UCLA researchers analyzed 31 long-term diet studies. And what they found is at least one-third to two-thirds of dieters ended up heavier than when they started within four to five years. And the longer dieters got tracked, the worse it got. In one of the studies they looked at, percent of the dieters followed for under two years ended up heavier. Of the ones that were followed for at least two years, 83% ended up heavier. Heavier. My experience is that this happens because a diet was unsustainable. So if trying to be 100% or even 80% compliant fails more than it succeeds, what should we aim for? For me and for the women that I coach, it's 60%. And that's not just a random number. 60 is, of course, just over half. And you need to be on point with your diet more often than not. You can hit 60% inside of your current lifestyle. You don't have to overhaul your schedule, cook separate meals from your family, or skip every social event on your calendar. 80% compliant sounds better on paper, but in a normal week, it usually demands a lifestyle overhaul. And that's exactly what you most likely won't keep doing long term. And then 50% just leaves too much room for little to no change. When you're only half in, you don't feel the progress. And when you don't feel the progress, you don't think it's working, and so you lose motivation. And then you give up because what's the point? But 60% is a spot where the effort is small enough to keep going and big enough to feel. You see movement on the scale, you see changes in your body. So you stay committed, you develop good habits, and then you see more movement in your weight. And what I like best about this strategy is that the day you hit your goal weight, nothing changes. You've been living your normal life the whole time. You've been enjoying dinners out, going on date nights, a glass of wine after a long day. So there's no diet to come off of. You'll already eat like a person who keeps the weight off because that's how you lost it. And that's literally the whole reason that my 20 pounds have stayed off for 10 years. And if you're thinking that 60% commitment sounds too slow to work, I'm gonna get to exactly that in just a minute. So if you were my sister or my best friend starting at zero and ready to lose weight and you came to me for advice, here's exactly what I'd have you do. Week one, I want you to do two things. I want you to drink half your body weight in ounces of water minimum, and get seven hours of sleep a night. The reason for the water is so that your body is properly hydrated, something so many of us don't do. And because so often we mistake thirst for hunger. And then prioritizing sleep helps us get our cortisol levels down so that our bodies and metabolisms respond better to the diet changes that we're going to make. Plus, I mean, both are two great habits to start forming right away anyway. So let's get that becoming our norm. Once that feels normal and consistent, I want you to add three workouts a week. Now, if you're ready to tune me out because you're not someone who works out, that's okay. We need you moving your body. And that is the greatest gift that you can give to yourself, but I'll save that for another episode. Ideally, this would be two lifting sessions and one cardio session or all three weightlifting. Now, if you're someone who's never picked up a weight or has no intention to, who doesn't go to a gym, who doesn't have a home gym, that's okay. We need to move our bodies. So I'm gonna have you do three to four 30-minute walks each week. We don't have to do it high intensity. Just get out and move your body and be consistent in creating this habit. And we're gonna give that two weeks. Okay, we're four weeks down and you're like, Andrea, this is crazy. Like, we're never gonna lose weight this way. I guarantee that with these changes alone, you'll already start to feel better, lighter, even if the scale hasn't moved, and your clothes will probably start fitting differently. Okay, after that, then we lower your calories just a little bit, maybe around 200 calories a day. And that might seem like a lot, but that can be really simple changes, like choosing chicken breast over chicken thighs, or lean ground turkey instead of full fat ground beef, or instead of a tuna sandwich with mayo, have a turkey sandwich, or pretzels instead of potato chips. Those types of changes make a huge impact because fat has more calories per gram. So you reduce some of that and you reduce a good amount of calories. But that 200 calorie deficit is just an estimate. I'm just throwing that out there. Every calorie deficit is going to be different based on individual factors. I have a free fat loss formula workbook that will help you determine that exact number, but for you, your maintenance calories, your protein target, and your calorie deficit for your body so that the deficit fits your life instead of being some random target off the internet. I'm gonna link that workbook in the show notes below. And then after a few weeks of that, I want you to tighten the food side one more step. Something I like to follow because it's really simple is 17 meals on plan each week and four meals that you enjoy with zero tracking. And that might seem like, okay, how do I do this? But really, what you need to do is eat healthy, eat well, eat on plan for all of your meals, with exception of four. That means take the four and use them when you are too tired to cook during the week and you just want to order takeout, or you have a social event, or you have a date night or brunch with a family, or you're gonna be running around all day on the weekend and you just can't be at home to eat healthy and you just need the easiest access. Okay, so four meals a week can actually feel pretty freeing. You're not tracking these, you're not counting calories, you're just eating the foods you like or whatever's convenient for you without having to worry about it. And notice what never happened as I'm painting this picture of the week. You never flipped your life upside down. Each step was small enough that your day or your week barely felt different. And stacked together, they are more than enough to change your body. Okay, let's talk about that speed of weight loss question, because 60% compliance does sound like a slow way to lose weight. You're right. It is it is slower. The results you'd get from being 80 to 100% compliant in a month might take three months this way. But you didn't gain the weight in a month either. And you already know by experience, and validated by what the research shows, that going all in on a diet and committing 80 to 100% will most likely backfire because it's unsustainable. So ask yourself this: Do you want four exhausting weeks that you won't be able to continue even one day past the finish line? Or progress you barely have to think about because it's so easy to maintain year over year. I always say the fastest way to lose weight and keep it off is to do it slowly. I mean, at the end of the day, weight loss is hard. So we think overhauling our lives and going all in is what we need to do to stay motivated, to lose as much as we can as fast as we can, and that it should feel hard. But anyone who has lost weight and kept it off for years can tell you that we've all been there and that's the opposite of what works. But we can also tell you that that all or nothing pull never fully goes away. I'm type A and the draw of starving myself when I've gained a few pounds, or eating everything in sight when I'm on vacation or out to dinner, and that little voice says, You're off plan anyway, so eat and drink everything and worry about it tomorrow is still strong. I have to catch it and remind myself that the goal when eating out or when on vacation is not progress. It's just not derailing. 10 years in, and I'm still practicing this, which should tell you that it is a skill, not a personality trait. You do not have to earn weight loss through extreme restriction. The women who lose weight and keep it off did just enough for just long enough in the lives that they still enjoyed. So if you're ready to try the 60% version, if you want to know how many calories you should be eating, grab that free Fat Loss Formula workbook below. It runs your numbers for you. Again, your maintenance calories, your calorie deficit, your protein targets for your specific body so that you know where to start and you know where to go. I'd love to hear your thoughts on this topic. If you have anything to share, hit that button below where it says send us fan mail and a message gets sent directly to me and I will respond. And if this was helpful, I would love for you to follow the show so that the next episode is already in your library. And if you have 10 seconds, it would mean the world to me if you could leave a rating. It's the single biggest factor that helps other women like us over 40 find this podcast. And if you want more on food, nutrition, workouts, and everything else that goes into losing weight after 40, come and join the Behind the Body newsletter. Every week I'll send you something to your inbox that will help you keep making progress. And you can sign up for free at behind thebody.com forward slash newsletter. In next week's episode, I'm taking on the low carb diet, why it drops weight so fast, and why that's the exact reason it comes back. I'll see you over there. Thank you so much for tuning in, my friend, and I can't wait to chat with you next week.