7 Lifting Mistakes That Cause Injury in Women Over 40

Nikkiey: If you're over 40 and you just started lifting weights, or you're thinking about starting, you need to hear this first. Weight training is the single most important thing you can do for your body right now: for your metabolism, for your bones, for your hormones, and for how you're going to feel at 60, 70 and 80. I will never tell you to stop lifting, ever. But in 30 years of coaching women, I've watched seven specific mistakes turn the most powerful tool in fitness into something that stalls results, causes injuries, or makes women quit entirely.

And almost every woman over 40 who starts lifting makes at least three of these without even knowing it. I made most of them myself during perimenopause. So I'm walking you through all seven so you never have to learn them the hard way. Let's get into it.

The first danger is the one nobody expects. The biggest risk in the weight room after 40 isn't lifting too heavy. It's lifting too light. I know that sounds completely backwards, but hear me out. Most women over 40 walk into their first lifting session and grab the five-pound dumbbells. They do 20 or 30 reps, feel a little burn, break a little sweat, and they think they did something. But that burn is not building muscle. Your muscles have been carrying groceries, picking up grandkids and opening jars for decades. Five pounds is not a challenge. And if it's not a challenge, your body has zero reason to change.

I had a woman tell me she'd been using the same pink dumbbells three days a week for four months. And shocking, nothing changed. She was ready to quit. She said, lifting doesn't work for me. It wasn't the lifting. It was the weight. We bumped her up, and within six weeks she saw more change than in those entire four months. That's the real danger here: lost time, lost belief. You walk away from the most effective tool you have because nobody told you to pick up heavier weight.

Here's the rule. The last two to three reps of every set should be genuinely hard. Not impossible. Not so heavy you can't control it. But hard enough that rep 11 or 12 requires real effort. If you finish a set and you feel like you could have done 10 more, the weight's way too light. After 40, your body only builds muscle in response to a stimulus it hasn't adapted to. Light weight for high reps is a stimulus your body adapted to decades ago. Challenge it with real load and it'll respond.

At 25, you could walk into a gym, throw the weights on your back and squat with no warmup. Your tendons were elastic. Your joints were lubricated. Your connective tissue was pliable. You could get away with it. At 45 or 50, that's how you tear something.

I learned this one the hard way. I went straight into an overhead press one morning without warming up because I was a little short on time, and my shoulder started clicking that week. And it clicked for three months. Three months of modifying every upper body exercise because I wanted to save five minutes.

After 40, your tendons, your ligaments, your connective tissue need a little more attention. They need blood flow and movement before you load them. If you skip that step, you're asking a cold rubber band to stretch under heavy tension. It doesn't snap on day one. It's the slow buildup over weeks of loading a cold joint. And then one day your shoulder hurts and you don't know why. But I do. You've been loading it cold for 12 weeks.

Five minutes, five little minutes. That's all it takes. Not static stretching; holding a stretch before lifting can actually reduce your force production. I'm talking about dynamic movement like arm circles, bodyweight squats, hip circles, walking for two minutes. Get your heart rate up slightly and get the blood flowing to the muscles and joints that you're about to train. Just five minutes of warmup can save you six months of physical therapy. After 40, the warmup is not really optional. It's injury insurance.

This one can end your lifting career if you get it wrong. And I need to explain the difference, because a lot of women treat these like they're the same thing, and they're not. Muscle soreness after a workout is normal. It's productive. It shows up a day or two after a workout. It's a dull ache in the middle of the muscle, like the center of your quad or the back of your shoulders or your glutes. It's uncomfortable, but it's not sharp, and it goes away within a couple of days. That's just your muscle fibers rebuilding stronger. That's a good sign.

But joint pain is completely different. Joint pain is sharp. It's right in or around your joint: your knee, your elbow, your shoulder socket, your wrist. It usually shows up during the movement, not a day later. And it's your body telling you something is wrong with how that joint is being loaded.

After 40, this distinction becomes everything, because some of us still carry that push-through-the-pain mentality from when we were younger. And after 40, that mentality can actually cause real damage to the joint. I've had women come to me who spent six months pushing through a shoulder that was screaming at them. By the time they stopped, they needed surgery. If they had listened at week two and modified the movement, they could have trained around it and never missed a session.

Here's the rule I give every single person I coach. Dull ache in the middle of a muscle a day or two after training: that's soreness. You're good. You're fine. Eat your protein. Stay hydrated. Let it recover. Sharp, in or around the joint, and it happens during the movement: that's pain. Stop. Don't push through it. Don't even try one more rep to see if it just goes away. Modify the exercise or just swap it out. And if it keeps coming back, talk to your doctor. The body is talking to you more after 40 than it ever has. The smart move is to listen to it.

Danger number four: the all-or-nothing trap. This is the one that costs women the most muscle over time, and almost nobody talks about it.

Here's how it plays out. A woman is three months into a great lifting routine. She's getting stronger. She's seen the changes. Then she tweaks her shoulder on a press, or her knee starts acting up, or she throws her back out picking up a box at home. And instead of modifying and working around it, she stops completely. She hasn't touched a weight for two months, maybe even three. Her muscle actually starts declining within two weeks of inactivity. By the time she feels better and comes back, she's actually weaker than when she first started. And starting over is so demoralizing that some women don't come back at all.

Either I train at 100% or I train at zero. That's the trap. And the middle path is where the results actually live. Your shoulder hurts? Train your lower body. Your knee is bothering you? Do upper body and core. Can't grip a dumbbell because of your wrist? Use machines or bands. Can't stand because of your back? Sit down and do seated presses and seated rows. There is almost always something you can do. And doing something, even 30% of your normal routine, is infinitely better than doing nothing.

Because you're sending your body the signal that muscle matters. You're maintaining what you've built. You're staying in the habit. And when the injury resolves, you're picking up right where you left off instead of rebuilding from zero.

I went through this myself. I had a stretch during perimenopause where my hip was giving me problems. I couldn't squat or deadlift without pain. It was so frustrating. My old instinct was to just stop everything. I had an excuse now. Instead, I trained my upper body three days a week and I walked. My hip recovered in about six weeks. My upper body was stronger than ever. And when I added my lower body back in, it hadn't lost nearly as much as it would have spending six weeks on the couch. The most dangerous words in fitness after 40 aren't "lift heavier." They're "I'll start again when I feel better."

Danger five: not eating enough to support the training. This is the most dangerous combination in women's fitness after 40, and I see it constantly. Heavy lifting plus 1,200 calories.

Every time you lift, you're creating tiny tears in your muscle fibers. That's the whole point. That damage is the signal that tells your body to rebuild the muscle stronger and denser than it was before. But rebuilding requires raw material: protein to repair the fibers, calories to fuel the process, carbs to replenish the energy your muscles burn during the workout.

If you're not giving your body enough fuel, two things happen. First, you don't recover. The muscle damage from your workout doesn't get repaired. So instead of showing up to your next session stronger than the last one, you show up weaker, more broken down. You're tearing yourself down without building back up. Over weeks and months, you're actually losing the muscle you came here to build.

Second, your cortisol spikes. Your body reads the combination of intense physical stress and not enough food as a total crisis. And it responds the way it always responds to crisis. It breaks down muscle for energy. It stores fat in your midsection. And it suppresses the hormones that drive the body recomposition you're actually training for.

So the woman who's lifting three days a week on a 1,200-calorie diet isn't just spinning her wheels. She's actively working against herself. She's doing the right training and undoing it with the wrong nutrition. I lived this for years. I was training hard, I was eating almost nothing, and I was wondering why my body wouldn't change. I thought I wasn't disciplined enough. I thought I needed to eat even less. I had the whole thing backwards. And when I finally started eating enough to support my training, everything shifted.

Here's what your body actually needs to support a lifting program after 40. Protein: 0.7 to 1 gram per pound of your goal body weight. If you're aiming for 140 pounds, that's 100 to 140 grams of protein a day. That's non-negotiable. Your muscles cannot rebuild without it. Total calories: enough to support your training and your recovery. For most women over 40 who are lifting three to four days a week, that's somewhere between 1,700 and 2,200 calories. Not 1,200, not 1,400. Your body cannot build on an empty tank.

I know this is the hardest part for a lot of women to hear. You've been told your entire life that eating less is how you lose weight. But when you're lifting, eating less is how you lose muscle. And losing muscle is how you slow your metabolism down. And slowing your metabolism is how you end up heavier than when you started, doing more work than ever, wondering why nothing is changing. Believe me, you need to fuel your training. Your body will take care of the rest.

And I want to tell you about someone who was living that exact danger without even knowing it. Paige is a nurse and a mom. In 2007, she got West Nile, and that kicked off a domino effect that lasted over a decade: ulcerative colitis, arthritis, back surgery, bone spurs, stents in her leg after blood clots. She was on muscle relaxants and opioid pain medication for 12 years. Her husband used to carry her to the ER because her back spasms were so bad she couldn't move. She said childbirth was actually easier.

And the part that broke her was her son. He'd ask her to play, and she'd have to say, "Sorry honey, mommy hurts." He wanted to go to the park, and she couldn't walk there. He wanted to wrestle, and she couldn't get on the floor. She was only in her late 30s, feeling like she was easily in her 80s.

She was eating 1,088 calories a day. She thought that's what women were supposed to eat. She was terrified of food, because her stomach hurt every single time she ate. So she just stopped eating, and everything got worse. When she started with us, her coach bumped her calories up gradually, a hundred at a time. And Paige was terrified. She thought eating more would make her bigger. But in her first phase, eating more food than she'd had in years, she lost weight.

And here's where danger number four shows up in her story too. Paige had every reason to quit: back pain, chronic conditions, a full-time nursing job, a young son. She had better excuses than almost anyone I've ever coached. But when something hurt, her coach didn't tell her to just push through it. She modified it. She built Paige's core first, strengthened the muscles around her back, and worked her up gradually until Paige was doing deadlifts without pain, something she never believed was possible.

She's a year and a half in now. She eats 2,360 calories a day. That's more than double where she started. She's been off the muscle relaxants for over a year. She's down to needing pain medication maybe once every six weeks. She took her son to Disneyland and walked 20,000 steps a day, carried him when his little legs got tired, and felt great the entire week. She didn't do more cardio. She didn't eat less. She lifted weights. She fed her body what it actually needed. And she modified instead of quitting when things got hard.

Danger number six: too much volume, not enough recovery. This is the overachiever trap. And if you're the kind of woman who pushes hard in everything, your career, your family, your fitness, this one is for you.

The instinct after 40 is to train more. If three days is good, five must be better. If four sets is good, six has got to be way better. If I'm not sore, I didn't do enough. If I took a rest day, I wasted a day. That instinct will break you.

Muscles don't grow in the gym. They grow between sessions. Let me say that again. Your muscles do not grow in the gym. The gym is where you tear them down. They grow during sleep. They grow during rest days. They grow during the 48 hours between sessions when your body repairs the damage and lays down new, stronger tissue.

If you're training six or seven days a week with no rest, you're never giving your body the window it needs to rebuild. You're tearing it down, tearing it down, tearing it down, and never building it back up. After 40, when your recovery is already slower than it was at 25, this is how you end up chronically fatigued, inflamed and eventually injured.

I was this woman for so many years. I overtrained my way through my early 40s because I always thought more was better. I was so exhausted. My cortisol was through the roof. I was holding weight on my midsection and could not figure out why. When I finally pulled back to four days and started sleeping more, my body finally changed. And it changed faster than it ever had when I was training six days a week.

Here's what actually works after 40. Three to four lifting sessions per week. Never two days in a row on the same muscle group. At least seven hours of sleep, because that's when the muscle actually grows. That's when growth hormone peaks and does its repair work. Two full days of rest per week where you don't lift. Walk on your off days and keep your steps up for insulin sensitivity and stress management, but don't load your joints with resistance. The women who get the best results after 40 are not the ones who train the most. They're the ones who recover the best.

Last one, and this is the one that sends women to the surgeon. Progressive overload means the weight goes up over time. That's how your body keeps adapting. That's how you keep building muscle. And I want you adding weight. I want those numbers going up. But every pound you add has to be earned by form that's already locked in at the current weight.

If your back rounds on a Romanian deadlift to hit a heavier weight, you didn't get stronger. You got closer to a disc injury. If your elbows flare out and your lower back arches on a press to push five more pounds, you didn't progress. You compensated. And compensation under load is how joints get destroyed.

Here's how progressive overload actually works after 40. You pick a weight. You work with it until you can do 12 reps with perfect form. Not good-enough form. Perfect. Every rep looks the same. Your joints feel clean. Your muscles are doing the work, not your momentum. Then, and only then, you go up, even two and a half pounds. And you work with that new weight until it's locked in. Then you go up again.

This is slow. I know it feels frustratingly slow. But this is the difference between women who live 20 years injury-free and women who blow out a shoulder in month four because they wanted a bigger number on the dumbbell. Your ego wants the bigger number now. Your body needs the form to be ready first. After 40, your body wins that argument every single time.

So those are the seven. None of them are reasons to stop lifting. Every single one is a reason to lift smarter. I made several of these mistakes myself. I overtrained for years. I underate while pushing harder and harder. I pushed through joint pain instead of just modifying. And every one of those cost me time that I am never getting back.

You don't have to make those mistakes now, because now you know. If you want to know where your body actually needs to start, whether it's training, nutrition or recovery, the free two-minute quiz is in the description. And if you want the four movements I'd pick if I could only train at home with a pair of dumbbells, I break that down in this video right here. Thanks for watching. I'll see you in the next one.