7.7 MUSCLE FIBRE TYPES AND ENERGY SYSTEMS

Which type of muscle fibre is red or dark in colour and can maintain a lower level of tension for long durations?

• Type I or Slow-Oxidative (SO)

• Type IIA or Fast-Oxidative Glycolytic (FOG)

• Slow-twitch muscle fibres

• Type IIB or Fast-Glycolytic (FG)

Which type of muscle fibre is more pale in colour, can generate large amounts of tension with relatively low endurance levels, and is ideal for short sprints and powerlifting?

• Type IIB or Fast-Glycolytic (FG)

• Type I or Slow-Oxidative (SO)

• Fast-twitch muscle fibres

• Type IIA or Fast-Oxidative Glycolytic (FOG)

What is the protein that delivers oxygen to working muscles, enabling energy-producing biochemical reactions to be sustained over a long time period?

• Oxidative enzymes

• Myosin ATPase

• Glycolytic enzymes

• Myoglobin

Which muscle fibre type is high in myoglobin and ideal for endurance activities?

• Fast-twitch muscle fibres

• Type I or Slow-Oxidative (SO)

• Type IIB or Fast-Glycolytic (FG)

• Type IIA or Fast-Oxidative Glycolytic (FOG)

Which muscle fibre type is more adapted to shorter bursts of effort and has low myoglobin concentrations?

• Type IIB or Fast-Glycolytic (FG)

• Slow-twitch muscle fibres

• Type IIA or Fast-Oxidative Glycolytic (FOG)

• Type I or Slow-Oxidative (SO)

Which type of muscle fibre generates energy slowly, is more fatigue-resistant, and primarily depends on aerobic processes?

• Type I or Slow-Oxidative (SO)

• Type IIA or Fast-Oxidative Glycolytic (FOG)

• Type IIB or Fast-Glycolytic (FG)

• Slow-twitch muscle fibres

Which type of muscle fibre allows for high-speed energy release as well as glycolytic capacity?

• Type IIB or Fast-Glycolytic (FG)

• Type IIA or Fast-Oxidative Glycolytic (FOG)

• Type I or Slow-Oxidative (SO)

• Fast-twitch muscle fibres

Which type of muscle fibre stores lots of glycogen and has high levels of enzymes necessary for quick contraction without requiring oxygen?

• Type I or Slow-Oxidative (SO)

• Type IIA or Fast-Oxidative Glycolytic (FOG)

• Type IIB or Fast-Glycolytic (FG)

• Slow-twitch muscle fibres

Which type of muscle fibre can become Type IIA fibres as a consequence of aerobic endurance training?

• Type I or Slow-Oxidative (SO)

• Type IIB or Fast-Glycolytic (FG)

• Slow-twitch muscle fibres

• Type IIA or Fast-Oxidative Glycolytic (FOG)

Which type of muscle fibre does not make the transition to Type I fibres as a consequence of aerobic endurance training?

• Type IIA or Fast-Oxidative Glycolytic (FOG)

• Slow-twitch muscle fibres

• Type I or Slow-Oxidative (SO)

• Type IIB or Fast-Glycolytic (FG)