This topic will cover the basics of exercise science, including its definition, scope, and importance in promoting health and well-being.
Introduction to Exercise Science
Key concepts, foundational principles, and practical applications
| Aspect | Description |
|---|---|
| Definition | The interdisciplinary study of how physical activity affects the human body, performance, health, and disease. |
| Core Disciplines | • Kinesiology • Physiology • Biomechanics • Motor Control & Learning • Nutrition • Psychology |
| Goal | Apply scientific knowledge to design, implement, and evaluate safe and effective exercise programs for diverse populations. |
| System | Acute Response (single bout) | Chronic Adaptation (weeks‑months) |
|---|---|---|
| Muscular | ↑ motor unit recruitment, ↑ blood flow, ↑ glycolysis | ↑ muscle fiber size (hypertrophy), ↑ mitochondrial density, ↑ oxidative enzymes |
| Cardiovascular | ↑ heart rate, ↑ stroke volume, ↑ cardiac output | ↓ resting HR, ↑ maximal cardiac output, ↑ capillary density |
| Respiratory | ↑ tidal volume & breathing frequency | ↑ VO₂max, ↑ alveolar‑capillary diffusion capacity |
| Skeletal | ↑ bone strain, ↑ calcium release | ↑ bone mineral density, ↑ trabecular thickness |
| Endocrine | ↑ catecholamines, cortisol, growth hormone | ↑ insulin sensitivity, altered resting hormone profiles |
| Nervous | ↑ motor unit firing frequency, ↑ proprioceptive feedback | ↑ neural drive, improved coordination, reduced reaction time |
| System | Primary Fuel | Duration | Typical Activities |
|---|---|---|---|
| Phosphagen (ATP‑CP) | Creatine phosphate | 0–10 s | Sprint, heavy lift |
| Anaerobic Glycolysis | Glucose → lactate | 10 s–2 min | 400 m run, HIIT |
| Aerobic Oxidative | Carbohydrate & fat | >2 min | Distance running, cycling |
| Principle | Meaning | Practical Example |
|---|---|---|
| Specificity | Adaptations follow the type of stress placed on the body. | Rowing improves rowing performance more than cycling. |
| Overload | To elicit adaptation, the stimulus must exceed current capacity. | Increase weight by 5 % each week. |
| Progression | Gradual increase in overload to avoid plateaus & injury. | Add 2 min to a cardio session every 2 weeks. |
| Individualization | Programs must match personal goals, fitness level, and health status. | Tailor intensity using heart‑rate zones. |
| Periodization | Structured variation of volume & intensity over time. | 4‑week hypertrophy block → 2‑week strength block. |
| Metric | How It’s Measured | Typical Range |
|---|---|---|
| Heart Rate (HR) | Beats per minute (BPM) using monitor or pulse | 50–85 % HRmax |
| Rating of Perceived Exertion (RPE) | Borg scale 6–20 or 0–10 | 3–7 (moderate) |
| VO₂% or METs | Oxygen consumption (ml·kg⁻¹·min |