5 Common Fitness Myths Debunked (and What Actually Works)

Diet culture has a way of sticking around. Even when we know better, a lot of its messaging is hard to unlearn.

We hear the same things over and over in the gym about fat loss, carbs, soreness, and what “works.” So let’s clear it up.

Here are 5 common fitness myths, debunked, along with what actually matters.

1. Myth: You need high reps for toning and fat loss

When it comes to toning and fat loss, any rep scheme can work. We just have to be working hard enough to create a stimulus.

The reality:
Nutrition drives changes in body composition more than the type of workouts. Calories and overall nutrition need to align with your goals.

Genetics also play a role. Our muscle shape and structure are largely determined by them. There is no such thing as “lengthening” muscle the way some influencers claim. To truly lengthen muscle, we would have to lengthen our bones, which we cannot do.

If I build muscle and flex my arms, it is going to look a certain way, just like Helen’s, Halen’s, Zach’s, and yours.

2. Myth: Carbs and sugar cause fat gain

Diet culture tends to villainize specific macronutrients. It is easy to get attention by blaming one piece of the puzzle.

The reality:
Any time we reduce carbs and high-calorie snacks, calories drop and weight often follows. But it is not because of carbs themselves. It is because of the reduction in calories.

That is how every diet works. Whether it is low carb, Mediterranean, or simple portion control, the common thread is reduced calorie intake.

The key is finding a way of eating that you enjoy and can sustain long term.

3. Myth: Squats and deadlifts are bad for your back and knees

Any exercise can be harmful if done incorrectly, and there are some movements where the risk outweighs the reward.

The reality:
Squats and deadlifts, when performed at the appropriate level, are some of the best things you can do for your back and knees.

They teach us how to move well and build strength in commonly weak areas including the lower back, glutes, quads, and hamstrings.

There are always exceptions, but overall, learning how to squat and deadlift properly is an essential movement pattern for long-term strength and longevity. It will not look exactly the same for everyone.

4. Myth: Spot reduction works (doing abs burns belly fat)

Spot reduction is one of the most persistent fitness myths, and it is simply not how the body works.

The reality:
Body fat is reduced through a sustained calorie deficit, and we do not get to choose where our body loses fat first.

You can strengthen specific muscles, but fat loss happens across the body as a whole.

5. Myth: Sore and sweaty = a good workout

Soreness and sweating are often treated as proof that a workout “worked.”

The reality:
They can be byproducts of a good workout, but they are not the goal.

You can sit in a sauna and be exhausted and sweaty, but that does not improve your strength, endurance, or overall fitness.

We may feel sore after workouts. I still do occasionally. It is not something we chase. Soreness simply means there was a new or increased stimulus.

That is why people often feel the most sore every few weeks when a program changes. They are not necessarily working harder, but the new stimulus creates a different response.

We do not seek soreness out, and we do not avoid it either. It is simply something that happens.