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Shoulder Movement Analysis: Freestyle Swim Stroke

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by

Sarah Verin

on 10 December 2013

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Transcript of Shoulder Movement Analysis: Freestyle Swim Stroke

Shoulder Movement Analysis: Freestyle Swim Stroke
Introduction
Explored the different phases that the arm and shoulder girdle on James Feldmeier
Different Phases-
Entry
Catch or Grab
Pull
Pre-Recovery
Recovery
Re-entry
With analyzing the different strokes we can determine more efficient ways to improve performance and reduce injury.
Procedure
1. Using a GoPro camera, film underwater a swimmer performing a freestyle stroke across a 25-meter pool.

2. Film both angles of the swimmer on both shoulders.

3. Using an iPad, film the swimmers stroke pattern and technique from outside of the pool.

4. Analyze the swimming stroke, breaking into five essential phases: entry, catch or grab, pull, pre-recovery, and recovery, which is followed by re-entry.
5. Characterized the motions occurring in the shoulder and arm, including its anatomical positions as well as types of muscular movement.
6. Analyze swimming phases by reviewing videos and pictures collected form action analysis.
Starting Position
Swimmer would first jump in pool and face their back to the wall.
Then submerge and place their foot on wall.
Push off the wall using the balls of feet.
Stroke begins once swimmer breaks the surface.
Swimmer keeps hands above head and biceps against ears.
Simultaneously butterfly kick to ensure longest and fastest distance traveled.
Injury
Most common type are rotator cuff injuries. Four main reasons:
misuse
overuse
abuse
disuse
Swimmers Shoulder- rotator cuff tendons are impinged.
most common area is supraspinatus
overlying subaciomial bursa becomes inflamed.
Muscular Analysis
Entry Phase
begins with swimmers hand superior to their head by use of the deltoids, biceps, and shoulder girdle.
Arm then internally rotates through usage of the teres major and latissimus dorsi
Catch or Grab Phase
Begins with arm fully extended by use of the deltoid, triceps, and teres major.
Elbow flexes under the influence of the pectoralis major, coracobrachialic and biceps brachii
shoulder girdle internally rotates to point the fingers out and down infront of individual with involvement of latissimus dorsi and pectoralis major and minor.
Pull Phase
arm moves inferiorly towards the legs by using the deltoid.
Result is what creates the force that propels swimmer froward.
Pre-Recovery Phase
Arm is parallel to the thigh after full extension during the pull phase.
Uses primarly the deltoid and latissiumus dorsi.
Recovery Phase
Follows pre-recovery by rotation of the arm out of the water through the deltoid and teres minor.
Allows the elbow to extend, through the deltoid, triceps and teres major.
Shoulder depresses through the latissimus dorsi and pectoralis major and minor, allowing arm to reposition intself for re-entry.
Prevention
warm up before going full speed.
gradually increase training intensity in beginning of the season
use proper technique
strengthen rotator cuff during off season.
Exercises
Prone table exercises-
Rowing requires humeral extension and elbow flexion
Prone extension- extend the shoulder with elbow extended and palms facing out away from body
Lower Trapezius- lie prone with humersu abducted 150 degrees and elbow flexed at 90
"TYI" exercises
Video
By: James Feldmeier
Sarah Verin
Adv. Sports Medicine p.2

Works Cited
Tovin, Brian J. "Prevention and Treatment of Swimmer's Shoulder." NCBI. U.S. National Library of Medicine, Nov. 2006. Web. 21 Nov. 2013.
Ho, Sherwin SW. "Swimmer's Shoulder ." Swimmer's Shoulder. Ed. Craig C. Young. N.p., 3 May 2012. Web. 21 Nov. 2013
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