KIN274_CriticalAssignment(6).docx

Anatomy Please examine the following images and complete the tables below each set of photos using anatomical terminology to describe the movements taking place. 1. Joint Joint Action Plane of Movement Muscle Agonist(s) Contraction Type Thoracic Spine Internal Rotation Transverse Plane a. Rectus Abdominis b. External Oblique Concentric Left Knee Extension Sagittal a. Quadriceps Concentric 2. Joint Joint Action Plane of Movement Muscle Agonist(s) Contraction Type Left Hip Extension Sagittal a. Hamstrings b. Gluteus maximus c. Adductor magnus Eccentric Right Hip Flexion Sagittal a. Hip adductors b. Illiacus Concentric

c. Rectus Femoris d. Tensor Fasciae Latae e. Psoas Major f. Sartorius g. Pectineus Right Glenohumeral Extension Sagittal a. Pectoralis Major b. Teres Major c. Latissimus Dorsi Eccentric 3. Joint Joint Action Plane of Movement Muscle Agonist(s) Contraction Type Left Glenohumeral a. External Rotation b. Extensio n Transverse a1. Pectoralis major a2. Anterior deltoid b1. Latissimus Dorsi b2. Subscapularis b3. Teres major Concentric Left Elbow Extension Sagittal a. Triceps Concentric 4.

Joint Joint Action Plane of Movement Muscle Agonist(s) Contraction Type Hip Extension Sagittal Plane a. Biceps Femoris b. Hamstrings c. Adductor magnus Eccentric Knee Extension Sagittal Plane a.Quadriceps Eccentric 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? A. The low bar squat

2. Which bar position maximizes the length of the moment arm between an axis point at the knee and the line of resistance? A. Front Squat 3. a. Based on your answers to the questions above, which bar position would you recommend for someone looking to maximally develop hip extensor musculature? Why? The Low Bar squat is particularly effective for strengthening the muscles involved in hip extension. This type of squat places the bar lower on the back, creating a longer lever arm between the hip joint and the resistance. As a result, the hips are able to extend more fully during the squat movement, providing a more targeted workout for key hip extensor muscles such as the hamstrings, gluteus maximus, and posterior fibers of the adductor magnus. b. Which bar position would you recommend for someone looking to maximally develop knee extensor musculature? Why? The Front Squat is ideal for building strength in the muscles responsible for extending the knee. By positioning the barbell in front of the body, this squat variation creates a longer lever arm between the knee joint and the resistance. Consequently, the knees can extend more fully during the exercise, leading to a more effective workout for the quadriceps muscle group, which is primarily responsible for knee extension. Defend your answers to parts a and b by using concepts related to torque and total mechanical work performed. Movement Analysis Please view the following videos and use your textbook to support your answers below: Swimmer 1: https://www.youtube.com/watch?v=x_brY9b205E&feature=youtu.be Swimmer 2: https://www.youtube.com/watch?v=JR15c9GUuLE&feature=youtu.be

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