Lecture 9

Question 1

muscular fitness contributes to :

Answer 1

• ↑ fat-free mass and ↑ resting metabolic rate
• ↑ in cardiovascular fitness (small increases)
• ↑ ability in tasks of daily living
• Maintaining bone mass

Question 2

Factors contributing to musclar fitness

Answer 2

Muscle size
Neural control
Fatigue resistance
ROM

Question 3

Explain muscle size

Answer 3

• Increased muscle cross-sectional area relates to strength in those muscles

Question 4

Explain neural control

Answer 4

• Learning effects for movements
• Synchronization of motor units
• Coordinating synergists and antagonists

Question 5

Explain fatigue resistance

Answer 5

• Size and density of mitochondria
• Amount of oxidative enzymes
• Increased capillary density
• Improved buffering capacity

Question 6

Explain ROM

Answer 6

Increased resting length (muscles and tendons)
• Achieve correct positions during exercise
• Improved efficiency of movement

Question 7

What are the different muscle actions/contractions

Answer 7

Concentric
Eccentric
Isometric
Isokinetic

Question 8

Explain concentric

Answer 8

muscle shortens during contraction

Question 9

Explain eccentric

Answer 9

muscle lengthens during contraction

Question 10

Explain isometric

Answer 10

muscle remains at same length

Question 11

Explain isokinetic

Answer 11

resistance varies with consistent speed

of contractions

Question 12

Health benefits of muscualr fitness

Answer 12

Weight management
Increased strength and power
Pain management 
Physiological benefits
Injury prevention