Is Weight Lifting Better For Weight Loss?

Most women over 35 have been told to stick to cardio if they want to lose weight. That advice is outdated, and it may be holding you back from the results you’re working for.

Is weight lifting better for weight loss than cardio? For most women, yes — because it preserves muscle while you lose fat, keeps your metabolism active longer after each session, and makes it easier to keep the weight off. Cardio burns more calories during the workout itself, but weight lifting changes how your body uses energy around the clock.

This matters because the scale often lies to women in midlife. You can lose fat, gain muscle, and see the number stay the same — while your clothes fit better and your body composition improves. That’s a win most cardio-only plans never deliver.

We’re going to look at what the research actually says, how to combine both approaches, and why protein becomes non-negotiable when you add lifting to your routine. No hype, no shortcuts — just what works.

Key Points at a Glance

What the Research Says About Lifting vs. Cardio

Research consistently shows that diet plus resistance training produces better body composition changes than diet plus cardio alone. A landmark study published in Medicine & Science in Sports & Exercise found that participants who lifted weights while dieting lost almost exclusively fat, while those who did only cardio lost a meaningful amount of muscle along with fat.

That muscle loss matters more than most women realize. Muscle tissue is metabolically active — it burns calories even when you’re sitting still. When you lose muscle, your resting metabolism drops. That’s why so many women hit a plateau after months of cardio and calorie cutting. They’ve shrunk their metabolism along with their body.

I’ve seen this pattern countless times with clients in their 40s and 50s. They’re doing an hour of cardio five days a week, eating 1,400 calories, and wondering why nothing moves anymore. The fix isn’t less food — it’s more muscle.

Is Weight Lifting Better for Weight Loss When You Compare Calories Burned?

Here’s where the honest answer gets complicated. A 150-pound woman burns roughly 200 to 300 calories during a 45-minute lifting session. The same woman burns roughly 350 to 450 calories during a 45-minute jog. During the workout itself, cardio wins.

But the comparison doesn’t end when you leave the gym. Weight lifting creates an afterburn effect — technically called excess post-exercise oxygen consumption — that keeps your metabolism elevated for up to 48 hours after your session. Studies indicate this afterburn is significantly smaller after steady-state cardio, often lasting only a few hours.

That means the total calorie difference between lifting and cardio narrows considerably when you look at a 24-hour window. And lifting has the added advantage of building tissue that raises your resting metabolic rate permanently, not just for a day or two.

One practical note from my own training: I add a short walk after lifting sessions. It’s not about burning more — it’s about keeping blood flowing to sore muscles so recovery starts faster. That recovery is where the muscle-building actually happens.

How to Combine Lifting and Cardio for Best Results

The evidence doesn’t support choosing one over the other when you can do both. Research suggests that combining resistance training with moderate cardio produces better fat loss than either alone — provided you’re eating enough protein and not overdoing the cardio volume.

Here’s the practical framework I recommend to women in this age group. Lift weights two to three times per week, focusing on compound movements like squats, deadlifts, rows, and presses. These exercises work multiple muscle groups at once, giving you more metabolic return per minute of effort.

Add cardio two to three times per week, but keep it at a moderate intensity — brisk walking, cycling, or incline treadmill work. Save the high-intensity interval training for one session per week if you want it. More than that tends to drive up hunger and interfere with recovery, especially when you’re in a calorie deficit.

I always tell clients to lift on the days they feel best. If you’re sore from lifting, a light walk is fine. If you’re energized, push the cardio a little harder. Your body’s feedback matters more than any rigid schedule.

Why Protein Matters More Than You Think

Weight lifting only preserves muscle if you give your body the building blocks to maintain it. That means protein — and most women over 35 aren’t eating nearly enough. The common recommendation of 50 to 60 grams per day is far below what research suggests for women who lift while in a calorie deficit.

Some studies indicate that higher protein intakes — around 1.6 to 2.2 grams per kilogram of body weight — produce better body composition changes during weight loss. For a 170-pound woman, that’s roughly 125 to 170 grams of protein daily. That’s a significant shift from the standard American diet.

The good news is you don’t need protein shakes and bars to hit these numbers. Eggs, Greek yogurt, chicken, fish, beans, and lentils all work. Spreading protein across three to four meals per day is more effective than eating it all at dinner.

A practical tip from my kitchen: I keep hard-boiled eggs and cottage cheese in the fridge at all times. When I need a quick protein boost, they’re ready without any thought required. That convenience is what makes consistent protein intake possible.

What About the Scale and Body Measurements?

If you start lifting while losing weight, expect the scale to move more slowly than it did with cardio alone. That’s not a bad sign — it’s your body replacing fat with denser muscle tissue. Muscle weighs more than fat by volume, so the same weight can look completely different on your frame.

Track progress with measurements and how your clothes fit instead of relying only on the scale. Take photos every four weeks. Notice how your energy levels change. These markers tell a more complete story than any single number on the bathroom scale.

One honest warning: the first two to three weeks of lifting often cause water retention as your muscles repair themselves. The scale may even go up slightly. This passes — it’s not fat gain, and it’s a sign your body is responding to the training.

Frequently Asked Questions

TDEECal Team

The TDEECAL Team writes about nutrition, metabolism, and fat loss the way we built our calculator, with real numbers and no hype. We dig into the research so you don’t have to guess.