What are the health benefits of regular physical activity?
Regularphysical activity is one of the most well-documented health interventions in preventive medicine. Its benefits extend to several systems:
- Cardiovascular: It lowers resting blood pressure, increases cardiac output, and reduces the risk of coronary heart disease by 30 to 35 percent, according to the WHO.
- Bone: stimulates mineralization and bone density through mechanical stress, reducing the risk of osteoporosis.
- Metabolic: improves insulin sensitivity, regulates blood sugar levels, and supports weight management by increasing active muscle mass.
- Immune system: Regular moderate exercise strengthens the immune system by stimulating the circulation of NK cells and lymphocytes. To boost natural immunity, physical activity is just as effective as many immunomodulatory supplements.
What is the difference between aerobic and anaerobic exercise?
The two main energy systems involved in physical activity serve different purposes:
- Aerobic exercise: slow running, swimming, cycling, Nordic walking. Improves cardiovascular endurance and VO2max during long-duration, moderate-intensity exercise.
- Anaerobic exercise: sprints, weightlifting, HIIT. Builds power, strength, and muscle mass during short, very intense workouts.
An optimal training program combines both types: aerobic exercise improves recovery between anaerobic sessions, and strength training protects the joints during prolonged cardio activities.
How does physical exercise influence mental health?
The impact of exercise on mental health is significant and multifaceted. Physical activity releases endorphins, serotonin, and dopamine, improving mood and reducing anxiety. It also increases the production of BDNF (brain-derived neurotrophic factor), promoting neurogenesis in the hippocampus and improving cognitive function. Meta-analyses confirm that regular exercise is as effective as antidepressants for mild to moderate depression. Sleep is also improved: physical activity increases the duration of deep sleep and reduces nighttime awakenings.
Which nutrients and supplements support physical exertion?
Several micronutrients are particularly in demand during physical exertion:
- Magnesium: Lost through sweat, it is essential for muscle function and energy production. A deficiency causes cramps, fatigue, and reduced performance.
- Vitamin C: required during intense exercise (high oxidative stress), it supports the synthesis of collagen in joints and tendons and helps reduce fatigue.
- Omega-3 EPA/DHA: These reduce post-exercise inflammation, protect muscle membranes from lipid peroxidation, and improve recovery.
- Carbohydrates and proteins: Carbohydrates provide energy for exercise; proteins (1.6 to 2.0 g/kg/day) support muscle repair and adaptation.
How can you recognize and prevent physical overexertion?
Overtraining occurs when the cumulative training load exceeds the body’s ability to adapt. Signs include:
- Persistent fatigue that does not improve with rest.
- An unexplained decline in performance lasting two weeks or more.
- Sleep disturbances (insomnia, non-restorative sleep).
- Irritability, loss of interest in training.
- Increased frequency of infections, a sign of relative immunosuppression linked to chronically elevated cortisol levels.
Prevention involves proper training periodization, adhering to recovery periods, and adequate nutrition. Muscle pain that persists for more than 7 days after exercise warrants a medical consultation.
How can you incorporate physical activity into a busy daily schedule?
The WHO recommends 150 to 300 minutes of moderate-intensity aerobic activity per week, plus 2 strength-training sessions. This amount can be achieved in shorter, split sessions:
- HIIT: 20- to 30-minute high-intensity sessions, which are just as effective for cardiovascular fitness as 60 minutes of continuous aerobic exercise.
- Integrated physical activity: brisk walking while running errands, taking the stairs instead of the elevator, and using a bicycle for daily errands.
- Active breaks: 5- to 10-minute walking breaks during long periods of sitting improve blood circulation and reduce the risk of venous thrombosis and orthostatic hypotension.
