7.7 MUSCLE FIBRE TYPES AND ENERGY SYSTEMS

Front

What are the three main types of muscle fibres?

Back

Type I (Slow-Oxidative), Type IIA (Fast-Oxidative Glycolytic), Type IIB (Fast-Glycolytic)

Front

What is the primary function of Type I muscle fibres?

Back

Type I muscle fibres are designed for endurance activities, providing sustained energy over long periods.

Front

What is the primary energy system used by Type IIB muscle fibres?

Back

Type IIB muscle fibres primarily use the anaerobic energy system, relying on glycogen for quick bursts of energy.

Front

What type of muscle fibre is characterized by high levels of oxidative enzymes?

Back

Type I (Slow-Oxidative) muscle fibres.

Front

Which muscle fibre type is best suited for short, high-intensity activities?

Back

Type IIB (Fast-Glycolytic) muscle fibres.

Front

What adaptation occurs in Type IIB fibres with aerobic training?

Back

Type IIB fibres can convert to Type IIA fibres, enhancing their oxidative capacity.

Front

What is the color characteristic of Type I muscle fibres?

Back

Type I muscle fibres are red or dark in color due to high myoglobin content.

Front

What type of muscle fibre is ideal for activities like sprinting?

Back

Type IIB (Fast-Glycolytic) muscle fibres.

Front

What is the significance of glycogen storage in muscle fibres?

Back

Glycogen storage allows for quick energy release during high-intensity activities.

Front

How do Type IIA fibres differ from Type IIB fibres?

Back

Type IIA fibres have a mix of oxidative and glycolytic properties, while Type IIB fibres are primarily glycolytic.