Which bar position maximizes the length of the moment arm between an axis point at the hip and the line of resistance?

Which bar position maximizes the length of the moment arm between an axis point at the hip and the line of resistance?

Anatomy

Please examine the following images and complete the tables below each set of photos using anatomical terminology to describe the movements taking place.

2.

Biomechanics

From left to right: front squat, high bar squat, low bar squat

1. Which bar position maximizes the length of the moment arm between an axis point at the hip and the line of resistance?

2. Which bar position maximizes the length of the moment arm between an axis point at the knee and the line of resistance?

3. 1. Based on your answers to the questions above, which bar position would you recommend for someone looking to maximally develop hip extensor musculature? Why?

1. Which bar position would you recommend for someone looking to maximally develop knee extensor musculature? Why?

Defend your answers to parts a and b by using concepts related to torque and total mechanical work performed.

4. Next, film yourself performing a strike (using any implement). Please film from a “face-on” angle as was done in CAP 3.  Please perform the movement in a very slow, controlled fashion while explaining the order of proximal to distal kinematic sequencing of the legs, pelvis, torso, arms, and wrists.  Use anatomical terms (i.e., flexion, extension, adduction, rotation, etc.) when appropriate.  Your goal should be to correctly demonstrate and verbally discuss proper sequencing.

Please film using your cell phone or other HD camera in landscape mode (turned horizontally).  Your video should be two minutes or less and should be uploaded to YouTube.  Please be sure your video is set to “public” or “unlisted” and paste the URL here: ____________________

Movement Analysis

Please view the following videos and use your textbook to support your answers below:

Swimmer 1: 

Swimmer 2:

1. Explain the examples above in relation to economy and efficiency.

2. Discuss the differences between the two swimmers in terms of the direction of mechanical work being done and how this influences efficiency.

Please view the following videos and use your textbook to support your answers below:

Thrower 1:

Thrower 2:

3. Describe the differences seen at the glenohumeral joint between the two throwers using anatomical terminology. Describe the differences as if you were explaining them to a kinesiologist who was not able to see the videos.

4. Using explanations of the length-tension relationship and stretch-shortening cycle at the glenohumeral joint, describe the power-generating capabilities of the two throwers.

Refinement and Application

Using the following pictures and the table immediately below to identify the agonist(s) at each joint.  Use the tables in Chapter 4 of your text to identify only the primary agonist(s) at each joint (your text uses italics to identify synergists – do not include these in your analysis).

1. What is the speed of movement in each joint? (bold your answer)
   1. Fast
   2. Slow

Using the table below, identify one Core (multi-joint) and one Assistance (single-joint) resistance training exercise that utilizes the same musculature as the movement pattern it is matched with.  Look to select exercises that would have the greatest carryover, or similarities, to the movement pattern and its application in-game.  See supplemental reading for explanation on exercise types.

Keys:

• The exercise(s) you select cannot be the same as the movement itself (i.e., do not use running to train the sprint)
• The same musculature used in the movement pattern must also be the prime mover in the exercise you select.
  • Additionally, speed and plane of the movement pattern should be considerations in your exercise choices.
• Core exercises must make use of free weights only, assistance exercises may use free weights, machines, bands, or bodyweight.

NOTE: If you choose an uncommon exercise that most people aren’t aware of, please include a video link/URL to show its demonstration (can be an existing video, you do not have to create it yourself).

Using the resistance exercises you selected above, program sets, repetitions, intensity, and rest periods in the table below.  Based on the desired speed of movement, please program your Core exercises for either muscular power or strength.  Assistance exercises should be programmed for hypertrophy.  Assume you are programming for a healthy and well-trained athlete.  Use the tables found in the Haff & Triplett supplemental reading found in week 6 to guide your work (Tables 17.9, 17.11, 17.12).

Finally, in paragraph form below, discuss how what you’ve learned in this course can be applied to your daily life.  Use peer-reviewed research and Biblical references to describe ideal habits related to movement, time spent sitting or being sedentary, as well as injury prevention.

References