Nutrition is often dominated by carbohydrates and proteins, putting lipids in the background, by demonizing them. In reality, lipids occupy a strategic place in energy metabolism, hormonal regulation, and injury prevention. Understanding their role and knowing how to integrate them intelligently can make all the difference.
1- Understanding lipids: not just “fats”
When we talk about lipids, we often think of “fat” in the diet. In reality, it is a family of nutrients much richer and essential to the proper functioning of the body, especially in athletes.
They include several types of molecules, each having a specific role:
- Triglycerides: lipids the most present in our diet. They mainly serve as an energy reserve. When you consume more energy than you expend, it is stored in the form of triglycerides in adipose tissue.
- Phospholipids: less known, they are nevertheless essential. They constitute the base of the membranes of all our cells. Without them, our cells simply could not function properly.
- Cholesterol: often poorly perceived, it is in reality essential. It is involved in the production of certain hormones, vitamin D, and participates in the structure of cells.
In daily life, lipids are not only used to store energy. They fulfill several essential functions:
- Provide energy over time
- Transport fat-soluble vitamins (A, D, E, K), essential for immunity, bones, or vision
- Protect organs and maintain body temperature
- Participate in the proper functioning of the brain, very rich in lipids
Behind the word “lipid” are also different types of fatty acids, which do not all have the same effects on health:
- Unsaturated fatty acids (the “good” lipids) : they are found in vegetable oils, fatty fish, nuts… they are beneficial for the heart and help regulate inflammation.
- Saturated fatty acids : present in certain animal products, they participate in the structure of cell membranes and contribute to hormonal production.
- Trans fatty acids : mainly from industrial products, these are the ones to limit as much as possible because they only have negative effects on cardiovascular health and increase chronic inflammation.
2- Lipids and energy metabolism
During physical effort, the body mobilizes different energy sources depending on intensity:
- During a short and intense effort, priority to carbohydrates.
- During a moderate to long effort, increasing use of lipids.
In endurance athletes, the body adapts to improve lipolysis (breakdown of fats) and oxidation of fatty acids. This adaptation allows:
- Better management of glycogen reserves
- Delayed fatigue
- More stable performance over time
This is notably the principle behind certain nutritional strategies such as fat adaptation or fasted training.
3- Hormonal role and recovery
Lipids are essential for hormonal production, notably:
- Testosterone: involved in strength, recovery, and muscle mass
- Cortisol: stress hormone, partly regulated by lipid balance
An insufficient intake of lipids can lead to:
- A decrease in libido and vitality
- Menstrual cycle disorders in female athletes
- Impaired muscle recovery
Moreover, omega-3s play a key role in modulating inflammation, helping to limit muscle soreness and chronic injuries.
4- Quality of lipids
Not all lipids have the same physiological impact. Quality is much more important than quantity.
Lipids to favor:
- Monounsaturated fatty acids: olive oil, avocado, almond, hazelnut
- Omega-3: fatty fish (such as sardines, mackerel, salmon), flax seeds, chia seeds, walnuts
- Omega-6 (to balance): sunflower oil, corn oil
Lipids to consume in moderation:
- Saturated fatty acids: butter, cheese, cream, fatty meats
Lipids to limit:
- Trans fatty acids: ultra-processed products, industrial pastries, ready meals
- Excess saturated fats: processed meats, fried foods
An imbalance, notably an excess of omega-6 compared to omega-3, can promote an inflammatory environment unfavorable to performance.
Some tips to apply daily:
- Favor raw and minimally processed products
- Cook with quality oils (olive, rapeseed)
- Consume fatty fish 1 to 2 times per week
- Add a small handful of nuts as a snack
- Limit industrial products rich in “bad fats”
Chloé Masson
Nutrition Project Manager
chloemasson.nutrition@gmail.com
See previous nutrition articles :
5 COMMON MYTHS ABOUT SPORTS NUTRITION
SPORT AND DIGESTION : HOW TO AVOID DISCOMFORT?
CALORIES: DO YOU REALLY NEED TO COUNT THEM WHEN YOU EXERCISE?