Responses and Adaptation to Exercise of Muscle Fibres

Question 1

What are the ACUTE RESPONSES of the MUSCLE FIBRES to EXERCISE?

Answer 1

• Increased recruitment= Strength
• Increased Force Production due to recruitment
• Increased rate of Fibre Recruitment
• Type 1a recruited first as they have lowest threshold
• Increased enzyme activity

Question 2

What are the ADAPTATIONS to ENDURANCE TRAINING of the MUSCLE FIBRES?

Answer 2

• Increased Aerobic Capacity of Type 1a fibres due to Mito Density
• Efficiency of blood supply to Type 1a
• Increased Glycogen and Fat storage
• Efficiency of muscle activation

Question 3

What are the ADAPTATIONS to POWER TRAINING of the MUSCLE FIBRES?

Answer 3

• Hypertrophy in fast twitch fibres
• Hyperplasia
• Increased fast twitch Recruitment
• Increased ATP+PC Stores
• Increased Neural Firing