Sports, Exercise & Health Science

Why Move? The Benefits of Regular Physical Activity

Physical activity isnt just about looking good; its a cornerstone of overall health. Regular exercise reduces risk of chronic diseases, improves mental wellbeing, and supports longevity. Here are the key domains impacted by movement:

• Cardiovascular health: Strengthens the heart, lowers blood pressure, and improves cholesterol profile.
• Metabolic health: Enhances insulin sensitivity, aids weight management, and lowers type2 diabetes risk.
• Musculoskeletal health: Builds muscle mass, maintains bone density, and supports joint stability.
• Cognitive function: Increases blood flow to the brain, boosts neurotrophic factors, and reduces agerelated decline.
• Mood & stress: Triggers endorphin release, reduces cortisol, and can alleviate symptoms of anxiety and depression.

Exercise Types: Choosing the Right Mix

1. Aerobic (Cardio)

Activities that increase heart rate and breathing for sustained periodsrunning, cycling, swimming, and brisk walking. Guidelines suggest at least 150 minutes of moderateintensity or 75 minutes of vigorousintensity cardio each week.

2. Strength Training

Resistance work that challenges muscles through weight machines, free weights, bodyweight moves, or bands. Aim for two or more sessions per week, covering all major muscle groups.

3. Flexibility & Mobility

Stretching, yoga, and dynamic mobility drills improve range of motion, reduce injury risk and support postexercise recovery.

4. Balance & Stability

Core work, singleleg stands, and proprioceptive exercises help maintain coordination, especially important for older adults.

Physiology Basics: What Happens Inside the Body

Understanding the bodys response to exercise helps you design smarter programs.

Energy Systems

• ATPCP system (phosphagen): Powers short, explosive bursts (010 seconds). Example: sprint or heavy lift.
• Glycolytic system: Provides energy for moderatelength efforts (10120 seconds) using glucose without oxygen.
• Oxidative system: Relies on oxygen to break down carbs and fats for longduration activities.

Muscle Adaptations

Progressive overload triggers two main adaptive pathways:

• Neurological: Improved motor unit recruitment, firing frequency, and coordination.
• Hypertrophic: Increased protein synthesis leading to larger muscle fibers (typeII) and enhanced endurance (typeI).

Cardiovascular Response

During exercise, cardiac output rises dramaticallyup to 2030L/min in elite athletesby increasing both heart rate and stroke volume. Over time, resting heart rate often drops, reflecting improved efficiency.

Nutrition & Recovery: Fueling Performance

Macronutrient Balance

• Carbohydrates: Primary fuel for highintensity work. Aim for 37g/kg body weight per day depending on training volume.
• Protein: Supports muscle repair and growth. 1.22.0g/kg body weight is typical for active individuals.
• Fats: Essential for hormone production and longduration energy; 0.81.0g/kg is a good target.

Timing Strategies

Consuming a carbohydrateprotein blend (3:1 ratio) within 3060minutes postexercise maximizes glycogen restoration and muscle protein synthesis.

Hydration

Even a 2% loss in body water can impair performance. Drink 150250ml of water every 1520minutes during activity and replace electrolytes after prolonged sweat loss.

Injury Prevention & Safe Training Practices

Injuries are often predictable and avoidable with proper planning.

WarmUp Essentials

Begin each session with 510minutes of lowintensity cardio followed by dynamic stretches targeting the muscles youll use.

Progression Principles

• Gradual overload: Increase load, volume, or intensity by no more than 10% per week.
• Deload weeks: Every 46 weeks, reduce volume to allow recovery.
• Crosstraining: Rotate activities to avoid repetitive strain.

Recovery Strategies

• Sleep: 79hours nightly for hormonal balance.
• Active recovery: Light cycling or swimming on rest days.
• Softtissue work: Foam rolling or guided massage to improve tissue elasticity.