Olson S Principles of Muscular Contraction

KIN 330

Lab 1

Olson’s Principles of Muscular Contraction

Directions. Working in pairs or in threes, identify the requested information under each column on the attached chart (pp. 3-4). Identify the axis of rotation BY DEFINITION. When actions 1-9 are completed, identify (choose or create) six additional actions and repeat the exercise for these six new actions. At least three of the six actions must require eccentric contractions.

The completed lab consists of the: action, starting position, ending position and joint to be analyzed, for each of the identified actions 10-15; as well as the information from the chart: joint action, direction w.r.t. resistance, type of contraction, primary muscle group contraction, plane of movement and axis of rotation. Use the format presented for actions 1-9 as a guide for defining the action, starting position, ending position and joint to be analyzed. Submit the completed, computer generated, exercise for actions 10-15 at the beginning of the next class.

1. Action: Pulldown of arms in the (traditional) Elementary Backstroke (swimming)

Starting position:Arms overhead (abducted 180o)

Ending position:Arms at 90o of abduction

Joint analysis:Shoulder

2. Action: Push up

Starting position:“Up” position (elbows in full extension)

Ending position:“Down” position (elbows in flexion >90o, elbows out)

Joint analysis:Elbow

3. Action: Push up

Starting position:“Down” position (elbows in flexion >90o, elbows out)

Ending position:“Up” position (elbows in full extension)

Joint analysis:Elbow

4. Action:Latissimus exercise with pulley system (“lat pulldowns)

Starting position:Upper arms abducted about 160o, holding onto the bar

Ending position: Upper arms by the sides of the body, still holding the bar

Joint analyses:a. shoulder

b.elbow

5. Action:Latissimus exercise with pulley system (“lat pulldowns)

Starting position:Upper arms by the sides of the body, holding onto the bar

Ending position: Upper arms abducted about 160o, still holding the bar

Joint analyses:a. shoulder

b.elbow

Olson’s Principles of Muscular Contraction cont.

6. Action:Walking down a flight of stairs

Starting position:The leg with which you will step down is already positioned over the lower step, i.e. the leg has swung forward in flexion at the hip, the knee is relatively “straight”, and the foot is pointed toward the lower step.

Ending position:A complete weight transfer has occurred onto the leg with which you just stepped, and the body has been lowered.

Joint analyses:a. hip

bknee

cankle

7. .Action:Walking up a flight of stairs

Starting position:The leg with which you will step up is already positioned over the upper step, i.e. the leg has swung forward in flexion at the hip, the knee is “bent”, and the foot is pointed toward the upper step.

Ending position:A complete weight transfer has occurred onto the leg with which you just stepped, and the body has been raised.

Joint analyses:a. hip

b. knee

c. ankle

8. Action: Dips on parallel bars

Starting position:“Down” position (elbows in flexion >90o, in line with the bars)

Ending position:“Up” position (elbows in full extension)

Joint analysis:a. shoulder

b. elbow

9. Action: Dips on parallel bars

Starting position:“Up” position (elbows in full extension)

Ending position:“Down” position (elbows in flexion >90o, in line with the bars)

Joint analysis:a. shoulder

b. elbow

Joint Action / Direction w.r.t. Resistance / Type of Contraction / Primary Muscle Group Contraction / Plane of Movement / Axis of Rotation
Joint Action / Direction w.r.t. Resistance / Type of Contraction / Primary Muscle Group Contraction / Plane of Movement / Axis of Rotation
7.
Joint Action / Direction w.r.t. Resistance / Type of Contraction / Primary Muscle Group Contraction / Plane of Movement / Axis of Rotation

NAMES ______

______

KIN 330