What are the key determinants of physical performance?
Physical performance is a multifactorial construct whose main determinants are:
- Cardiovascular capacity (VO2max): determines the maximum amount of oxygen that can be utilized by the muscles per unit of time. It is the strongest predictor of endurance performance.
- Maximal muscle strength and explosive power: These factors influence performance in strength sports, sprinting, and team sports.
- Movement economy: The biomechanical efficiency of a sports movement determines energy expenditure at a given intensity.
- Body composition: The ratio of active muscle mass to body fat directly influences relative power (W/kg), which is a key factor in cycling and running.
Blood circulation is the common factor linking all these determinants: it delivers oxygen, energy substrates, and anabolic hormones to the working muscles.
How can you develop cardiovascular capacity and strength?
Improving physical performance relies on combining two types of training:
- Cardiovascular training: Long workouts in Zone 2 (where conversation is possible) promote structural adaptations (increased capillary density, mitochondria); HIIT intervals push back the lactate threshold and increase VO2max.
- Resistance training: Multi-joint exercises (squats, deadlifts, pull-ups) build maximum strength, strengthen the muscles that stabilize the joints, and reduce the risk of injury during endurance activities.
Combined training (strength + cardio in the same week) is beneficial provided there is a 6- to 8-hour interval between the two types of sessions to avoid physiological interference.
What nutrition strategy should you follow to optimize physical performance?
Performance nutrition follows principles tailored to the goal and intensity of the effort:
- Protein (1.6 to 2.2 g/kg/day): essential for muscle fiber repair. Spread out over 3 to 5 meals to maximize protein synthesis.
- Carbohydrates: the primary fuel for moderate- to high-intensity exercise. Glycogen stores determine the ability to sustain intense exercise.
- BCAAs (leucine, isoleucine, valine): activate muscle protein synthesis via the mTOR pathway and reduce muscle breakdown during prolonged exercise.
- Unsaturated fats: precursors to anabolic and anti-inflammatory hormones, essential for long-term performance.
Which supplements improve physical performance?
Supplements with a high level of evidence for physical performance:
- Creatine monohydrate (3 to 5 g/day): improves maximum power and strength gains during intense workouts. The most studied and most effective supplement for explosive performance.
- Electrolytes (sodium, potassium, magnesium): maintain neuromuscular conductivity and prevent cramps during prolonged exercise. An absolute priority in extreme heat or during heavy sweating.
- Coenzyme Q10: a cofactor in the mitochondrial respiratory chain, it optimizes aerobic energy production and may reduce chronic muscle fatigue in high-intensity athletes.
- Dietary nitrates (beet juice, 300 to 600 mg 2 to 3 hours beforehand): converted into vasodilatory nitric oxide, they improve muscle oxygenation and reduce the energy cost of exercise.
What role does psychology play in physical performance?
The psychological dimension often makes the difference in performance at high competitive levels:
- Mental visualization: Repeating technical movements and competition scenarios improves motor memory and reduces competition anxiety.
- Cardiac coherence and controlled breathing: These reduce resting heart rate and cortisol levels, improving recovery between efforts and enhancing decision-making clarity.
- Exercise tolerance: The ability to maintain intense effort despite fatigue can be developed through progressive exposure and by setting process-oriented goals rather than outcome-oriented ones.
How should recovery be structured to maintain performance?
Recovery is just as important as training. The best-documented strategies:
- Nutritional recovery (within 30 to 60 minutes after exercise): protein + carbohydrates for muscle repair and glycogen replenishment.
- Active recovery (walking, light cycling, yoga): stimulates local blood flow and accelerates the elimination of metabolic waste products.
- Cryotherapy and compression: reduce post-exercise swelling and inflammation, particularly useful after competitions or intense eccentric training sessions.
- Quality sleep (7 to 9 hours): nighttime growth hormone peak for muscle repair and consolidation of technical skills.
