Sketch a graph that illustrates how knee extension power relates to knee extension velocity for an elite 100m sprinter. Label the axes and include units, but do not concern yourself with axes values. On the same graph, sketch the same relationship for an elite ultra-marathoner (be sure to label which line is which). Explain the physiological reasons for the important differences between the two subjects, highlighting differences in peak power, velocity at peak power, and maximum shortening velocity.