In sprint acceleration, the durations of the flight phases are which values?

In sprint acceleration, the durations of the flight phases are which values?

• A. .70 and .90
• B. .60 and .80
• C. .50 and .70
• D. .90 and 1.00

Answer: (A)

Flight time is the portion of the stride when the foot is off the ground between contacts. In sprint acceleration, you spend more time airborne as speed increases, so the flight phase durations are typically in the range from about 0.70 seconds early in the acceleration to about 0.90 seconds as you approach higher speeds. Those two values reflect the observed progression of flight time during the acceleration phase. Shorter ranges don’t match the longer airborne time seen as you accelerate, and the longer range would imply flight times more typical of very different sprinting conditions.

Flight time is the portion of the stride when the foot is off the ground between contacts. In sprint acceleration, you spend more time airborne as speed increases, so the flight phase durations are typically in the range from about 0.70 seconds early in the acceleration to about 0.90 seconds as you approach higher speeds. Those two values reflect the observed progression of flight time during the acceleration phase. Shorter ranges don’t match the longer airborne time seen as you accelerate, and the longer range would imply flight times more typical of very different sprinting conditions.