Muscle Fibres and Marathon Performance

Type 1 muscle fibres are characterized by:

• High endurance and slow contraction speed

• Low endurance and fast contraction speed

• High power output and fast contraction speed

• Low power output and slow contraction speed

When does a marathon runner use type 1 muscle fibres?

• During short sprints

• During long-distance running

• While lifting heavy weights

• While resting

Type 1 muscle fibres are important because:

• They are responsible for quick bursts of energy.

• They are fatigue-resistant and support endurance activities.

• They are primarily used for anaerobic activities.

• They are the largest muscle fibres in the body.

When does a marathon runner use type 2 muscle fibres?

• During the start of the race

• While running uphill

• During a sprint finish

• Throughout the entire race

Why are type 2 muscle fibres important?

• They provide endurance for long-duration activities.

• They are responsible for quick and powerful movements.

• They help in maintaining posture.

• They are primarily used in aerobic exercises.