Top 5 Mistakes People Make When Trying to Lose Weight (And How to Fix Them)

a sad fat woman sitting on the floor

Losing weight is simple in theory, burn more calories than you consume. But in reality, it’s much harder than that. I’ve seen countless people struggle, not because they’re lazy or lack willpower, but because they unknowingly make some key mistakes that slow down (or completely stall) their progress.

If you’ve been trying to lose weight and aren’t seeing the results you want, you might be making one of these common mistakes. The good news? I’ll show you exactly how to fix them so you can get back on track.

1. Relying Too Much on Cardio and Ignoring Strength Training

a woman running on treadmill

Many people believe that running on the treadmill for an hour is the best way to burn fat. While cardio is great for heart health, it’s not the most effective long term weight loss strategy.

Why This Is a Mistake:

  • Excessive cardio can burn muscle along with fat, slowing your metabolism.
  • Strength training builds lean muscle, which helps you burn more calories even at rest.
  • The more muscle you have, the easier it is to maintain your weight loss.

How to Fix It:

  • Incorporate at least 2-3 strength training sessions per week, focus on compound movements like squats, deadlifts, and push ups.
  • Balance cardio with resistance training to preserve muscle mass while burning fat.
  • Use progressive overload, gradually increase weights or reps to challenge your muscles.

Want a full strength training guide? Check out this detailed blog post I wrote on How to Approach Strength Training as a Beginner

2. Underestimating How Many Calories You Eat

cashew nuts

You think you’re eating “healthy,” but your weight won’t budge. Sound familiar? Many people underestimate their calorie intake, which leads to frustration.

Why This Is a Mistake:

  • Portion sizes are often much bigger than we think.
  • Healthy foods (like nuts, avocados, and smoothies) can still be high in calories.
  • Restaurant meals and takeout often contain hidden calories from oils, dressings, and sauces.

How to Fix It:

  • Track your food intake with an app like MyFitnessPal to see how much you’re actually eating.
  • Learn proper portion sizes, for example, a serving of rice is about the size of your fist.
  • Be mindful of liquid calories. juices, sodas, and fancy coffee drinks add up quickly.

Looking for a simple, effective way to manage your diet? Read my post on intermittent fasting for effortless portion control!

3. Expecting Fast Results and Quitting Too Soon

a sad fat woman sitting on the floor

One of the biggest reasons people give up is because they don’t see results fast enough. They expect to drop 10 lbs in a week, and when that doesn’t happen, they quit.

Why This Is a Mistake:

  • Healthy weight loss is 1-2 lbs per week, not overnight.
  • The body resists rapid weight loss, often leading to weight regain.
  • Progress isn’t always visible right away, fat loss happens even when the scale doesn’t move.

How to Fix It:

  • Set realistic goals, aim for steady, sustainable progress rather than quick fixes.
  • Track non-scale victories, focus on how your clothes fit, increased energy, and strength gains.
  • Trust the process, weight loss takes consistency, not perfection.

Need motivation to stay on track? Read my post on The Undeniable Benefits of Regular Exercise, Including Its Positive Impact on Your Sex Life.

4. Not Eating Enough Protein

sources of protein

Protein isn’t just for bodybuilders. It’s a key player in weight loss that many people overlook.  

Why This Is a Mistake:  

  • Protein keeps you full longer, reducing cravings.  
  • It helps preserve muscle while burning fat.  
  • It has a higher thermic effect, meaning your body burns more calories digesting it.  

How to Fix It:

  • Eat a protein source with every meal. chicken, fish, eggs, tofu, or legumes.  
  • Aim for at least 1.2-2.2g of protein per kg of body weight (or about 30% of your daily calories).  
  • Use high protein snacks. like Greek yogurt, cottage cheese, or protein shakes.  

5. Not Managing Stress and Sleep

Not Managing Stress and Sleep​

Most people think weight loss is all about diet and exercise, but stress and sleep play a huge role too.

Why This Is a Mistake:

  • Lack of sleep increases cravings for junk food.
  • Stress raises cortisol levels, which promotes fat storage, especially in the belly.
  • Poor recovery leads to low energy and motivation, making workouts harder.

How to Fix It:

Prioritize 7-9 hours of sleep per night.

Manage stress with activities like meditation, watch comedy movies/shows, or light exercise.

Avoid screens before bed. blue light messes with your sleep cycle.

Focus on the Big Picture

If you’re making one (or more) of these mistakes, don’t worry, you’re not alone! The key to weight loss isn’t about being perfect, it’s about making small, sustainable changes that add up over time.

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Start by focusing on strength training, tracking your food intake, staying patient, eating enough protein, and managing stress & sleep, and you’ll see results.

Which of these mistakes have you made before? Drop a comment below and let’s talk about it!

Looking for more weight loss tips? Browse my best guides on Health and Fitness  for science backed strategies that actually work!

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