Factors Affecting Performance：練習問題

To improve stability when preparing to receive a heavy load, an athlete should position their center of gravity in which of the following ways?

A basketball player shoots a free throw, misses the rim completely, and immediately realizes that their elbow was flared too far out during the release. This realization is an example of:

In Fitts and Posner's three-stage model of motor learning, which characteristic is most associated with the autonomous stage of skill acquisition?

During a track start, a sprinter exerts a backward force of \( 900 \text{ N} \) on the starting blocks. According to Newton's Third Law of Motion, what is the resulting force that moves the sprinter forward?

An athlete has a resting heart rate (\( \text{HR} \)) of \( 45 \text{ bpm} \) and a stroke volume (\( \text{SV} \)) of \( 110 \text{ mL} \). During maximal exercise, their \( \text{HR} \) increases to \( 190 \text{ bpm} \) and their \( \text{SV} \) increases to \( 160 \text{ mL} \). Calculate the difference in cardiac output (\( \text{Q} \)) between rest and maximal exercise.

Explain how the accumulation of hydrogen ions (\( H^+ \)) during high-intensity exercise impacts muscular contraction and contributes to fatigue.

Comparing Type IIb (Fast-Glycolytic) and Type I (Slow-Oxidative) muscle fibers, explain how their metabolic characteristics determine their suitability for an explosive 100m sprint versus a marathon.