Dexter plays basketball - Edexcel - GCSE Physical Education - Question 11 - 2020 - Paper 1

In basketball, the intensity of play can vary significantly, and the type of muscle fibres utilized by players changes accordingly. The three main types of muscle fibres relevant to the different intensities are:

1. Type I Muscle Fibres (Slow-twitch)

These fibres are used predominantly during low-intensity activities, such as the jogging back to position seen in Figure 6. They are more endurance-oriented, allowing players to sustain activity over longer periods without fatigue. This is essential for maintaining performance throughout the game.

2. Type IIa Muscle Fibres (Fast-twitch, oxidative)

These fibres come into play during moderate-intensity activities, such as jumping to reach the ball at the start of the game. They provide a balance of endurance and strength, enabling efficient energy use while allowing for explosive movements when necessary. Their importance is highlighted in transitional plays where quick bursts are needed, combining increased demand for power and speed.

3. Type IIb Muscle Fibres (Fast-twitch, glycolytic)

These fibres are primarily engaged during high-intensity efforts, like sprinting to the basket as shown in Figure 6. They generate quick, powerful bursts of speed and strength but fatigue quickly. In critical moments of the game, when speed and power are paramount, these fibres allow players to perform high-intensity movements necessary for scoring and defense.

In conclusion, understanding and utilizing the different muscle fibre types effectively can greatly impact a player’s performance based on the intensity of the play occurring during the game.