PMID- 22012494
OWN - NLM
STAT- MEDLINE
DCOM- 20120227
LR  - 20220310
IS  - 1543-3072 (Electronic)
IS  - 1056-6716 (Linking)
VI  - 20
IP  - 4
DP  - 2011 Nov
TI  - Reliability of video motion-analysis systems to measure amplitude and velocity of 
      shoulder elevation.
PG  - 393-405
AB  - CONTEXT: Dynamic shoulder motion can be captured using video capture systems, but 
      reliability has not yet been established. OBJECTIVE: To compare the reliability 
      of 2 systems in measuring dynamic shoulder kinematics during forward-elevation 
      movements and to determine differences in these kinematics between healthy and 
      injured subjects. DESIGN: Reliability and cohort. SETTING: Research laboratory. 
      PARTICIPANTS: 11 healthy subjects and 10 post-superior labrum anteroposterior 
      lesion patients (SLAP). INTERVENTION: Contrasting markers were placed at the hip, 
      elbow, and shoulder to represent shoulder elevation and were videotaped in 2 
      dimensions. Subjects performed 6 repetitions of active elevation (AE) and active 
      assisted elevation of the shoulder, and 3 trials were analyzed using Datapac 
      (comprehensive system) and Dartfish (basic system). MAIN OUTCOME MEASURES: 
      Amplitudes and velocities of the shoulder angle were calculated. Intraclass 
      correlation coefficient (ICC), standard error of measurement (SEM), and levels of 
      agreement (LOA) were used to determine intersystem and intertrial reliability. 
      RESULTS: For AE, the amplitude maximum (ICC = .98-.99, SEM = 2-3 degrees , LOA = -9 degrees  to 
      5 degrees ) and average velocity (ICC = .94-.97, SEM = 1 degrees /s, LOA = -4 degrees  to 1 degrees /s) indicated 
      excellent intersystem reliability between systems. Intratrial reliability for 
      minimum velocity was moderate for Datapac (ICC = .64, SEM = 4 degrees /s, LOA = 7 degrees /s) and 
      poor for Dartfish (ICC = .52, SEM = 20 degrees /s, LOA = 37 degrees /s). Cohort results 
      demonstrated for AE a greater amplitude for healthy v SLAP (139 degrees  +/- 11 degrees  v 113 degrees  +/- 
      13 degrees ; P = .001) and interaction for an average velocity increase of 2 degrees /s in 
      healthy and decrease of 2 degrees /s in SLAP patients over the 3 trials (P = .02). 
      CONCLUSIONS: Reliability ranges provide the means to assess the clinical 
      meaningfulness of results. The cohort differences are supported when the values 
      exceed the ranges of the SEM; hence the amplitude results are meaningful. For 
      dynamic shoulder elevation measured using video, the assessment of velocity was 
      found to produce moderate to good reliability. The results suggest that with 
      these measures subtle changes in both measures may be possible with further 
      investigations.
FAU - Melton, Christopher
AU  - Melton C
AD  - University of Washington, Seattle, WA, USA.
FAU - Mullineaux, David R
AU  - Mullineaux DR
FAU - Mattacola, Carl G
AU  - Mattacola CG
FAU - Mair, Scott D
AU  - Mair SD
FAU - Uhl, Tim L
AU  - Uhl TL
LA  - eng
PT  - Comparative Study
PT  - Journal Article
PL  - United States
TA  - J Sport Rehabil
JT  - Journal of sport rehabilitation
JID - 9206500
SB  - IM
MH  - Adult
MH  - Analysis of Variance
MH  - Biomechanical Phenomena/*physiology
MH  - Cohort Studies
MH  - Female
MH  - Humans
MH  - Male
MH  - Movement
MH  - *Range of Motion, Articular
MH  - Reproducibility of Results
MH  - Shoulder/*physiology/physiopathology
MH  - *Shoulder Injuries
MH  - Task Performance and Analysis
MH  - Video Recording/*methods
MH  - Young Adult
EDAT- 2011/10/21 06:00
MHDA- 2012/03/01 06:00
CRDT- 2011/10/21 06:00
PHST- 2011/10/21 06:00 [entrez]
PHST- 2011/10/21 06:00 [pubmed]
PHST- 2012/03/01 06:00 [medline]
AID - 10.1123/jsr.20.4.393 [doi]
PST - ppublish
SO  - J Sport Rehabil. 2011 Nov;20(4):393-405. doi: 10.1123/jsr.20.4.393.