Discussion Post I
There are several multijoint muscles in the knee. Discuss these muscles as groups.
A. When do they lengthen simultaneously over all the joints they cross?
B. What type of insufficiency may occur?
C. What if they simultaneously shorten? What changes?
Analyze the activity of moving from sitting to standing, and the reverse motion of moving from standing to sitting. Perform these activities and then analyze how the subject in Figures 1-5 performed those activities.
A. How does the position of the knee change?
B. What are the prime movers?
C. What types of muscle contractions are occurring? When? Why? Explain.
Discussion Post II
Choose to discuss either acute or chronic adaptations to the circulatory and respiratory systems. For ease of discussion, include your choice in the thread title.
A. Include a brief introduction on the role of these systems (circulatory and respiratory) during exercise.
B. Identify the following variables and how they change (either with acute exercise or long-term training).
a. Cardiovascular: Heart Rate, Stroke Volume, Cardiac Output, Blood Pressure
b. Respiratory: Tidal Volume, Minute Ventilation, Breathing Frequency
C. Explain why it makes sense that these variables change/adapt as they do. What would happen if they did not adapt?
Be sure to include reputable resources to back up the information you share. For follow-up posts, be sure to engage with at minimum one post covering each topic (acute or chronic exercise).