mmorris_swimmersshoulder
TRANSCRIPT
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Objectives
• Briefly discuss the phases of the freestyle swimming stroke.
• Discuss the prevalence and incidence of shoulder pathology in swimmers
• Identify ROM adaptation and flexibility patterns among injured and uninjured swimmer’s shoulders
• Review GIRD, total arc of motion, and external rotation deficiency
• Learn evidence based evaluation and management strategies based on the current body of literature
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Shoulder Revolutions per Week
1000 1000 300
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4000 rev / day
30,000 rev /
week
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90%
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Prevalence of Shoulder Pain
(Competitive swimmers)
40-91%3:1 female : male
Bak et al, 1997; Ciullo, 1986; McMaster 1999;
rupp et al. 1995; Sein, et al. 2010; Harrington, et
al. 2014
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KNOW THE
STROKE
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FreestyleFastest & most frequently performed
80%
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Glide
Early pull-through
Mid pull-through
Late pull-through
Recovery
http://www.swimsmooth.
com/breathing.html
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Am J Sports Med. 1991 Nov-Dec;19(6):569-76.
The normal shoulder during freestyle swimming. An electromyographic and cinematographic analysis of twelve muscles.Pink M1, Perry J, Browne A, Scovazzo ML, Kerrigan J.
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Glide
• Begins as hand enters
water
• Elbow slightly higher
than hand
Normal Painful• Arm placed further
from midline
• Humerus lower and
‘dropped elbow’
• Late / decreased
recruitment of upper
trapezius
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Early Pull Through
• Occurs from end
of glide to when
hand reaches
max extension
and begins
downward
motion
Normal Painful
• Decreased
serratus anterior
activity
• Increased
rhomboids
activity � net
loss of scapular
upward rotation
and protraction
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Late Pull Through
• Occurs from
90◦ of flexion
to when the
hand exits the
water
• Early hand exit (to
avoid extremes of
internal rotation?).
• Increased activity in
rhomboids to
retract and elevate
the scapula
Normal Painful
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Recovery
• Occurs from when the hand exits the water to just before hand entry
• No water resistance
Normal Painful
• Decreased
anterior
deltoid
activity
• More lateral
hand entry
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• Scapular dyskinesias increase in frequency
throughout a training session
• Swimmers are subject to early fatigue due to
high training volume
• Serratus anterior muscle fatigues earlier in
painful swimmers
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Breathing Patterns
• Unilateral breathing associated with
small tilt angle on breathing side
**High incidence of shoulder impingement
on ipsilateral side
• Case for adopting B/L breathing
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Swimmers at Risk
• Small tilt angle
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Mr. Smooth
https://www.youtube.com/watch?v=IyR7JYllk9U
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Bak, K. 2010
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Swimmers’ painful shoulder
arthroscopic findings and return rate
to sportsC. Brushøj1 , K. Bak2 , H. V. Johannsen3 , P. Faunø4
• Labral pathology (61%)
• Subacromial impingement (28%)
• Bursal sided tear of supraspinatus tendon
• Impingement of posterior rotator cuff
• Inflammation of Biceps - LH
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Surgical Treatment
• Distal clavicle excision
• CA ligament resection
• Debridement
• Decompression
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Outcomes
• 59% able to compete at pre-injury level after
2-9 months.
– 7 without shoulder pain (44%)
– 2 with some pain
– 7 never returned (44%)
Brushej, et al. 2007
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Etiology of ‘Swimmers Shoulder’
Extrinsic Factors
• Training volume – sudden increase
• Technical errors
• Hand paddles
Intrinsic Factors
• Excessive laxity / general joint hypermobility
• Posture, core stability, increased thoracic kyphosis
• Scapular dyskinesias
• GIRD (glenohumeralinternal rotation deficit)
• Rotator cuff imbalance
• Hypomobility (posterior capsule, rotator cuff, pectoralis minor)
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GIRD ‘Glenohumeral Internal Rotation
Deficiency’
• Hypermobile ER,
hypomobile IR
• Most overhead athletes
(including swimmers)
demonstrate this motion
disparity
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‘The Disabled Throwing Shoulder’
series… old news?
• Burkhart, et al 2003
– GIRD: loss of IR shoulder motion on dom.
extremity
– Caused by posteroinferior capsular contracture
– Increased external rotation is an acquired
secondary cause
– GIRD is at the core of many throwing injuries
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…but now we know there is more to
the story…
• Kevin Wilk, George Davies, Mike Reinold,
Kibler… change of heart?
• Lots of new data
• ‘TROM’ = TOTAL RANGE OF MOTION
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GIRD: normal vs pathologic
• Manske, et al. 2013 (and Kevin Wilk, George Davies, Mike Reinold…)
– ‘Loss of GH IR is a normal phenomenon that should be expected’.
– ANATOMIC: IR loss of <18-20 degrees with symmetrical TROM B
– PATHOLOGIC: IR loss >18-20 with corresponding TROM loss >5 when compared bilaterally
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Says Who?
• Pitchers whose TROM comparison was >5 were 2.5x more likely to sustain shoulder injury
• TROM should be symmetric, and not >186
• If we stretch to increase IR PROM, we may be increasing TROM and thus INCREASING risk of injury
– Increased demands on dynamic and static stabilizers of GH joint
Wilk, et al. 2012
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ERD: the new GIRD
• External rotation deficiency
– Pitchers with <5 degrees extra ER on dominant
side 2.3x increased risk of shoulder injury
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Summary
• GOOD / OKAY:– Symmetrical TROM
– Dominant arm has at least 5 degrees MORE ER than non-dominant (THROWERS ONLY)
– IR loss within 18-20 degrees when compared B
• BAD: – IR loss >18-20 with corresponding TROM loss >5 when
compared bilaterally
…….what about swimmers?
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• Significant predictors: ER ROM and previous
history of shoulder injury
• Low (<93°) and high ER (>100°) were assoc.
with increased risk of injury
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• Hypermobile in shoulder ABD, ER, and flexion
• Hypomobile in shoulder internal rotation
• Little correlation between hypermobility or
hypomobility and shoulder pain
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GIRD vs PST (posterior shoulder
tightness)
• Borsa, et al. No association between joint laxity and ROM (in healthy subjects)
– Laxity measured by Telos device
– Posterior joint laxity was more commonly
associated with IR deficit
**IR loss due to osseous
adaptations and posterior
soft tissue tightness
Wilk, 2009
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• Resolution of symptoms after physical therapy
treatment for internal impingement was
related to posterior shoulder tightness but
NOT correction of GIRD
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Posterior shoulder tightness
Tyler Test
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**BOTH are good, supine slightly better
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Keep in Mind Arm Dominance!
• NORMAL for arm dominance to be associated
with:
– Forward shoulder posture
– Loss if IR ROM
– Posterior shoulder tightness
*Dominant arm involved: effects accentuated
*Non-dominant arm involved: effects absent
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Other risk factors…
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• Symptomatic, >12 yrs of age:
– Pectoralis minor tightness
– Decreased core endurance
• Symptomatic, <12 yrs of age:
– Reduced shoulder flexibility
– Weakness of middle trap & shouder int. rotators
– Tightness of latissimus dorsi
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• Measured:
– PROM IR and ER @90
– Strength: scapular depression, adduction, IR, ER
– Core endurance (side bridge, prone- bridge)
– Pectoralis minor muscle length
A cross-sectional study examining shoulder
pain and disability in Division I female
swimmers.Harrington S1, Meisel C, Tate A.
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Results
• Pectoralis minor muscle length was the only
variable which had a statistically significant
difference between groups (painful and non
painful shoulder).
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Takeaways?
• GIRD: may not be pathologic
• ERD and TROM more important than GIRD
– Ideal between 93 – 100?
• Look at posterior shoulder tightness
– May be source of pathologic IR loss
• Measure pectoralis minor
• Strengthen scapular stabilizers! (serratus
anterior!)
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The evidence based examination
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Pec Minor Length
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Pectoralis Minor
• Supine, elbows extended
• Inferomedial coracoid process � caudal edge of 4th rib at sternum
• Exhale before measurement
• Intrarater reliability: good – excellent
• Interrater: poor -moderate
Struyf, et al. 2014
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Pectoralis Minor
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Vertical towel roll placed
under thoracic spine
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Doorway stretch wins!
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Posterior Shoulder Tightness
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• A Single application of
MET for GHJ horizontal
abductors provides
immediate improvements
in both GHJ horizontal
adduction and IR ROM
• Dosage:
• 5 sec contraction @
25% effort, 30 sec
stretch, x3
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THAT’S ALL!
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Good Resources:
• Chris Johnson, PT: YouTube Channel
– Exercise videos, tests, etc.
• ‘Mr. Smooth’ : great animations of swimming
technique
– www.swimsmooth.com
– Also, stroke animations app
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LAB!!
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Lab To-Do
• IR / ER measurement– positioning
– optimal scapular stabilization
• Measure posterior tightness
• Pec minor length– Novel pec minor stretch
• Treat!– MET
– Cross body stretch
– Modified cross body stretch
– Sleeper’s stretch
– Modified sleeper’s stretch
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Who has tight posterior shoulder?
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Modified sleepers stretch
• Method reduces
impingement
• Have patient do a
quarter turn towards
their back
• GH joint in
scapular plane
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Cross body stretch
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Modified cross body stretch
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Standing cross body stretch
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APPENDIX
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The Backstroke
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The Butterfly
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The Breastroke