In this article, let’s debunk more Fitness myths.
Maybe not as wildely spread on magazines and in the general public, those myths run deep in the minds of anyone getting their toes in physical activities.
They can be detremental, even sometimes counter-productive.
let’s get into it.
Low intensity to burn fat
- The Myth:
To lose fat, you should train at low intensity. Walk longer. Do slow cardio. Stay in the so-called “fat-burning zone.” This is a fitness myth that I have heard more times that I can count.
The reasoning is straightforward: At lower intensities, the body uses a higher percentage of fat as fuel.
It sounds convincing.
It’s also incomplete.
- What research shows:
It is true that at lower exercise intensities, a higher proportion of energy comes from fat oxidation.
However, fat loss is not determined by the percentage of fat used during a workout. It is determined by total energy balance over time.
When intensity increases, total energy expenditure rises significantly. In addition, higher-intensity exercise can elevate post-exercise oxygen consumption, meaning the body continues to expend more energy even after the session ends. As a result, the overall caloric impact of higher-intensity training is often greater, despite a lower proportion of fat being used during the activity itself.
Research consistently shows that moderate- to high-intensity training produces similar or greater fat loss compared to low-intensity exercise when total energy expenditure is accounted for. The determining factor is not the “zone,” but the sustainability of a caloric deficit.
- What it’s actually good for:
Low-intensity training still has clear value. This type of exercise supports recovery, builds an aerobic base, and allows individuals, especially beginners, to accumulate training volume without excessive fatigue. It is accessible, sustainable, and beneficial for overall health. but don’t take it as a standalone solution for fat loss.
No pain no gain
- The Myth:
If it does not hurt, it does not work. Soreness, burning sensations, and exhaustion are often seen as proof of an effective workout. The myth is that the more pain you feel, the better the results.
- What research shows:
Muscle soreness, often referred to as delayed onset muscle soreness (DOMS), is not a reliable indicator of progress. It is primarily associated with muscle damage and unfamiliar stimuli rather than muscle growth itself.
It is entirely possible to make significant progress without experiencing soreness. Conversely, it is also possible to feel intense soreness without producing meaningful adaptations. Strength and hypertrophy are driven by progressive overload, sufficient training volume, and proper recovery. Pain is not part of that equation in any meaningful predictive way.
- What it’s actually good for:
Effective training should be challenging, but also sustainable. It should push the body enough to stimulate adaptation while allowing for proper recovery. Without recovery, muscles can’t properly grow.
Progress is better assessed through improvements in strength, movement quality, and consistency over time rather than through discomfort.
Lifting heavy makes women bulky
- The Myth:
Women who lift heavy weights will develop a masculine, overly muscular physique. This myth remains one of the most persistent barriers preventing women from engaging fully in resistance training. It is well known that sports clubs lose a big portion of female teenagers during puberty, for many factors, one of them being scarcity about physical appearance.
- What research shows:
Muscle development is strongly influenced by hormonal factors, particularly testosterone. Women naturally have significantly lower levels of testosterone than men, typically five to ten times less. This difference plays a major role in limiting the extent of muscle hypertrophy.
Research shows that while women can gain strength at rates comparable to men in relative terms, increases in muscle mass tend to be more moderate. Resistance training improves body composition by increasing lean mass and reducing fat mass, but it does not lead to a “bulky” or masculinized appearance under normal conditions.
In reality, developing a highly muscular physique requires years of consistent, structured training, precise nutritional strategies, and in some cases, pharmacological enhancement. It does not happen unintentionally.
- What it’s actually good for:
Resistance training plays a central role in women’s health. It improves bone density, increases lean muscle mass, reduces injury risk, and enhances metabolic function. It also contributes to a more defined and functional physique. Far from being something to avoid, it is one of the most effective tools available.
Final thoughts
The fat-burning zone does not determine fat loss. Pain is not a reliable indicator of progress. Lifting heavy does not masculinize women.
These ideas persist because they contain elements of truth, but they are misunderstood and misapplied.
References:
- Achten, J., & Jeukendrup, A. E. (2004). Optimizing fat oxidation through exercise and diet. Nutrition
- Melanson, E. L., et al. (2002). Effect of exercise intensity on 24-h energy expenditure and substrate oxidation. Journal of Applied Physiology
- Boutcher, S. H. (2011). High-intensity intermittent exercise and fat loss. Journal of Obesity
- Schoenfeld, B. J. (2012). Does exercise-induced muscle damage play a role in hypertrophy? Journal of Strength and Conditioning Research
- Damas, F., et al. (2016). Resistance training-induced changes in muscle damage and hypertrophy. Journal of Physiology
- Phillips, S. M. (2014). A brief review of critical processes in exercise-induced muscular hypertrophy. Sports Medicine
- Westcott, W. L. (2012). Resistance training is medicine. Current Sports Medicine Reports
- Hunter, S. K. (2014). Sex differences in human fatigability. Exercise and Sport Sciences Reviews
- Stricker, P. R., et al. (2020). Resistance training for women: benefits and misconceptions. Current Sports Medicine Reports
