CSC Speed and Agility Training 1

Question 1

Which phase of sprinting requires the greatest lower-body strength relative to body weight?

Accepted Answer

Acceleration phase

Answer

The acceleration phase demands the highest ground reaction forces relative to body weight as athletes push horizontally from a low body angle against the ground.

Question 2

What is the definition of reactive strength index (RSI)?

Accepted Answer

Jump height divided by ground contact time during drop jumps

Answer

RSI is calculated by dividing jump height by ground contact time, providing a measure of the ability to rapidly absorb and redirect force in stretch-shortening cycle activities.

Question 3

Which of the following best describes the stretch-shortening cycle (SSC) and its role in speed development?

Accepted Answer

A rapid eccentric-to-concentric contraction that stores and releases elastic energy

Answer

The SSC involves a rapid eccentric (pre-loading) phase followed immediately by a concentric phase, allowing elastic energy stored in tendons to enhance force output beyond what muscle alone produces.

Question 4

What is the most effective training method for improving an athlete's first-step quickness?

Accepted Answer

Resisted sprint starts and reaction drills

Answer

Resisted sprint starts (with sleds or bands) develop horizontal force production, and reaction drills train the neural component of first-step quickness.

Question 5

Which mechanical variable is most strongly correlated with maximum sprint velocity in elite sprinters?

Accepted Answer

Vertical ground reaction force during stance

Answer

Research consistently shows that the magnitude of vertical ground reaction force applied during the brief stance phase is the primary determinant of maximum sprint velocity.

CSC - Certified Strength Coach Practice Test

CSC - Certified Strength Coach Practice Test

CSC Speed and Agility Training 1