Four things you’re getting wrong about your fitness

There are some common misconceptions about exercise. Here's what you're probably getting wrong. Worth noting: we're assuming your goal is to improve your health with the most efficient approach. If you're moving for fun, connection, or anything else that isn’t about efficiency, all the power to you!

1. Sweating more means you're working harder.

Sweating is your body's thermoregulation system. The amount you sweat doesn't indicate how hard you're working — it indicates how efficient your body's cooling system is. People in better shape often sweat sooner into activity because their body responds quickly to changes in temperature. Hydration and clothing layers also affect sweat output. None of it tells you whether your workout is actually working.

2. Burning a lot of calories means your workout was effective.

We're in an era of tracking everything, and while some of that data is genuinely useful, calorie burn is often inaccurate and can push us toward movement that closes rings rather than moving us toward our goals. The latest science, including a study from February 2026, shows that calories burned through exercise are only moderately effective for weight loss. While your watch might show 500 calories burned, your body dynamically compensates in unconscious ways, adjusting the net impact of that effort to roughly 30%. So when you think you've worked off 500 calories, you're actually spending an extra 150. The calorie deficits required for weight loss are most effectively achieved through diet, not exercise.

3. Being sore means your workout was effective.

What we call Delayed Onset Muscle Soreness (DOMS) isn't actually coming from your muscles. It's largely coming from your fascia, the connective tissue that wraps and links your muscle fibres. Fascia has more nerve endings than muscle does, making it more pain-sensitive. When it gets stressed beyond its capacity, it inflames. That's the ache you feel two days later. Here's the thing: fascial inflammation isn't the same as muscle adaptation. The real driver of strength and change is mechanical tension, training close to your limit with intention and good form. Not exhaustion. Not the hobble. A workout that leaves you feeling challenged but not destroyed can be doing far more for your body than one that wrecks you for a week.

4. The burn means it's working.

The burn is simply a buildup of hydrogen ions in the muscle, a byproduct of metabolic fatigue, not a sign of muscle growth. High-rep, low-resistance formats are effective at creating that sensation, but the feeling happens in the moment without building much muscle. Muscle adaptation happens when you bring a muscle close to failure, the point where another rep simply isn't possible. That can happen at high or low reps, but it requires a heavier load. The burn is just your muscle running out of fuel. Whether it's sweating or burning, you're feeling effort, not necessarily earning results.

Don't feel bad if you've held onto some of these ideas. They're incredibly common assumptions, driven by fitness marketing rather than exercise science. Understanding how your body actually works can help you make smarter choices, whatever your goals.