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Exercise physiology

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Exercise physiology

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Exercise physiology

  1. 1. Exercise physiology
  2. 2. Exercise • Aerobics • Yoga • Resistance training program
  3. 3. Muscles in exercise • Strength: maximal contractile force between 3 and 4 kg/cm2 of muscle cross- sectional area – Bulk • Power: measure of the total amount of work that the muscle performs in a unit period of time • Endurance: great extent to which a muscle can work - Glycogen
  4. 4. Muscle metabolic systems in exercise
  5. 5. Oxygen Debt Breathing extra amounts of oxygen over and above the normal requirements after a heavy exercise To restore • phosphagen system • lactic acid system
  6. 6. Effect of athletic training on muscles and muscle performance • Importance of Maximal Resistance Training • Muscle Hypertrophy • Fast-Twitch and Slow-Twitch Muscle Fibers.
  7. 7. Respiration in exercise • Acute: • increase in ventilation (Rate & depth) • Increase in oxygen consumption • Chronic training: • Increase in lung volume & capacity • Increase in Oxygen diffusing capacity • Increase in tissue utilization of oxygen
  8. 8. Cardiovascular system in exercise • Acute: – Increase in CO, vasoconstriction except blood flow to muscle under active – Depends upon the severity Systolic & Diastolic BP increases • Chronic training: – Decrease in heart rate (bradycardia) – Increase in SV, CO & Cardiac reserve – Hypertrophy of ventricle
  9. 9. Body heat in exercise • Increase in temperature causes vasodilation to muscle blood flow Heatstroke. During endurance athletics, even under normal environmental conditions, the body temperature often rises from its normal level of 98.6° to 102° or 103°F (37° to 40°C). • With very hot and humid conditions - 41° to 42°C • Extreme weakness, exhaustion, headache, dizziness, nausea, profuse sweating, confusion, staggering gait, collapse, and unconsciousness.
  10. 10. Body fluids and salt in exercise • Severe decrease in water & electrolyte level causes dehydration, muscle cramps & nausea
  11. 11. Other effects Benefits of practicing exercise: • Regulates the lipid profile & prevents hypertension • Regulates the blood sugar level & prevents diabetes • Maintains body weight & prevent obesity • Improves psychological well being & prevents depression, anxiety & stress • Improves immunity • Increases RBC count • Improves bone density • Increase GH & enhance growth
  12. 12. BODY FITNESS PROLONGS LIFE THANK YOU

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