A-Level Sport & PE: Advanced Analysis & Evaluation

Front

Quantify the impact of the Stretch-Shortening Cycle (SSC) using the formula for Elastic Potential Energy (PE = 1/2kx²).

Back

PE = 0.5 × stiffness (k) × displacement (x)². This formula explains why a deeper, faster counter-movement (increasing x) significantly enhances plyometric performance. It demonstrates that stored elastic energy in muscle-tendon complexes (series elastic component) allows the muscle to generate greater total force than concentric contraction alone, provided the transition (amortization phase) is minimal.

Front

Calculate Projectile Motion: Determine the optimal release angle for maximum horizontal distance when a shot putter releases from a height above the landing plane.

Back

For maximum distance, the release angle should be less than 45 degrees when the shot is released from a height above the landing point. The higher release shifts the optimal angle below the angle that would maximize range from level ground.

Front

Differentiate between Fast Glycolytic (FG) and Slow Oxidative (SO) fiber recruitment strategies during a 1500m race.

Back

The 1500m requires a dynamic shift. Initially, SO fibers (Type I) handle the aerobic base. As fatigue sets in and pace increases (kick), the motor unit recruitment threshold is reached, recruiting Fast Oxidative Glycolytic (FOG) and potentially FG (Type IIb) fibers for the final sprint. The 'Size Principle' dictates that smaller motor units (SO) are recruited first before larger, more fatigable units (FG), which are reserved for high-intensity surges.

Front

Analyze the Physiological Determinant of the 'Oxygen Deficit' at the onset of intense exercise.

Back

Oxygen deficit represents the lag between energy demand and aerobic supply. It occurs because the aerobic system (mitochondrial respiration) cannot meet the immediate ATP requirement. The body relies on stored ATP, PCr (Phosphocreatine), and anaerobic glycolysis (producing lactate/H+) to bridge this gap until 'steady state' is reached. A smaller deficit through training indicates improved cardiovascular efficiency (faster VO2 kinetics).

Front

Evaluate the concept of 'Velocity Specificity' in resistance training programmes for sprinters.

Back

Strength gains are velocity-specific. Training with slow, heavy loads increases maximal force but does not effectively improve high-velocity movement due to different motor unit recruitment patterns and neural firing rates. To improve sprinting speed (high velocity), athletes must train with lighter loads moved at maximal speeds (ballistics or plyometrics) to specifically recruit and train Fast-Twitch fibers for rapid contraction rates.