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PHYSIOLOGY OF AGING:
CARDIORESPIRATORY AND MUSCULAR SYSTEMS
What is the CAUSE of this?
· Decreased strength of heart
· Stiffening of arteries
· Decreased capacity for muscles to use oxygen
· Reduced elasticity of smooth muscle in bronchi and lungs
· Altered shape of thoracic cavity with age
What can be done to PREVENT this?
· Physical activity
· Moderate aerobic exercise has shown to indirectly slow the rate of cardiorespiratory decline by reducing the rate of vertebral degeneration and by improving the muscles in the thoracic cavity
· Vigorous exercise has shown to slow the aging process at the cellular level and is also related to maximal aerobic exercise capacity
· Maintaining fitness level
· Helps in reducing mobility issues
· Attain a better quality of life
CARDIORESPIRATORY fitness is defined as:
· the ability to perform large muscle movement over a sustained period; related to the capacity of the heart-lung system to deliver oxygen for sustained energy production. Also called cardiorespiratory endurance or aerobic fitness.
· An individual’s decline in fitness tends to start around the age of 30 and is typically seen to decline at approximately 10% per decade. It accelerates even further toward the end of the lifespan, even in healthy persons.
Further Resources:
American Academy of Health and Fitness
http://www.aahf.info/sec_exercise/section/muscular.htm
http://www.aahf.info/sec_exercise/section/cardiovascular.htm
http://www.aahf.info/sec_exercise/section/respiratory.htm
YouTube:
https://www.youtube.com/watch?v=GASaqPv0t0g
What is the CAUSE of this?
· Sedentary behavior
· Hormonal changes
· Insulin resistance
· Genetic susceptibility
· Appetite loss
· Nutritional deficiencies
· A shift in muscle fiber composition
What can be done to PREVENT this?
· Physical exercise
· Nutritional support
· Resistance exercise
· Strength training program
MUSCULAR fitness is defined as:
· muscular endurance refers to the ability of a muscle or muscle group to exert force against a resistance over a sustained period of time, while muscular strength refers to the maximal force a muscle group can exert during contraction