PMID- 19593417
OWN - NLM
STAT- MEDLINE
DCOM- 20100929
LR  - 20220310
IS  - 1938-162X (Electronic)
IS  - 1062-6050 (Print)
IS  - 1062-6050 (Linking)
VI  - 44
IP  - 4
DP  - 2009 Jul-Aug
TI  - Generalized joint laxity associated with increased medial foot loading in female 
      athletes.
PG  - 356-62
LID - 10.4085/1062-6050-44.4.356 [doi]
AB  - CONTEXT: The relationship between generalized joint laxity and plantar pressure 
      distribution of the foot and the potential implications for lower extremity 
      injury have not been studied. OBJECTIVE: To determine the relationship between 
      generalized joint laxity and dynamic plantar pressure distribution. We 
      hypothesized that individuals with greater generalized joint laxity, or 
      hypermobility, would have greater dynamic medial midfoot pressure and loading 
      during walking than nonhypermobile individuals. DESIGN: Case control. SETTING: 
      Institutional biomechanics laboratory. PATIENTS OR OTHER PARTICIPANTS: 
      Participants included 112 female soccer players between 11 and 21 years of age. 
      MAIN OUTCOME MEASURE(S): Each participant was tested for generalized joint laxity 
      using the Beighton and Horan Joint Mobility Index (BHJMI; range, 0-9) and was 
      categorized as having either high (BHJMI score >or=4) or low (BHJMI score <4) 
      generalized joint laxity. Peak pressure and maximum force were calculated from a 
      dynamic, barefoot plantar pressure distribution system. RESULTS: Peak pressure 
      and maximum force were greater in the 27 participants categorized as having high 
      generalized joint laxity than in the 85 participants categorized as having low 
      generalized joint laxity. The midfoot region exhibited greater loading in 
      participants with high generalized joint laxity than in the other participants. 
      We found an effect of BHJMI classification in the medial midfoot; peak pressure 
      in the dominant (F(1,109) = 11.262, P = .001) and nondominant (F(1,109) = 14.32, 
      P < .001) sides and maximum force in the dominant (F(1,109) = 7.88, P = .006) and 
      nondominant (F(1,109) = 9.18, P = .003) sides were greater in the high 
      generalized joint laxity group than in the low generalized joint laxity group. 
      CONCLUSIONS: Athletes classified as having high generalized joint laxity 
      demonstrated increased midfoot loading. Delineation of risk factors for medial 
      collapse of the foot, which include hypermobility in athletes, may help 
      clinicians evaluate and prevent lower extremity injury with treatments, such as 
      orthoses.
FAU - Foss, Kim D Barber
AU  - Foss KD
AD  - Sports Medicine Biodynamics Center, Cincinnati Children's Hospital, Cincinnati, 
      OH 45229, USA. kim.foss@chmcc.org
FAU - Ford, Kevin R
AU  - Ford KR
FAU - Myer, Gregory D
AU  - Myer GD
FAU - Hewett, Timothy E
AU  - Hewett TE
LA  - eng
GR  - R01 AR049735/AR/NIAMS NIH HHS/United States
GR  - R01 AR056259/AR/NIAMS NIH HHS/United States
GR  - R01-AR049735/AR/NIAMS NIH HHS/United States
PT  - Journal Article
PT  - Research Support, N.I.H., Extramural
PL  - United States
TA  - J Athl Train
JT  - Journal of athletic training
JID - 9301647
SB  - IM
MH  - Adolescent
MH  - Adult
MH  - Analysis of Variance
MH  - Arthrometry, Articular
MH  - Biomechanical Phenomena
MH  - Case-Control Studies
MH  - Child
MH  - Female
MH  - Foot Injuries/*etiology
MH  - Humans
MH  - Joint Instability/*complications
MH  - Patellofemoral Pain Syndrome/*etiology
MH  - Soccer/*injuries/physiology
MH  - *Weight-Bearing
MH  - Young Adult
PMC - PMC2707069
OTO - NOTNLM
OT  - foot mechanics
OT  - foot pressure
OT  - hypermobility
OT  - maximum force
OT  - patellofemoral pain
EDAT- 2009/07/14 09:00
MHDA- 2010/09/30 06:00
PMCR- 2009/07/01
CRDT- 2009/07/14 09:00
PHST- 2009/07/14 09:00 [entrez]
PHST- 2009/07/14 09:00 [pubmed]
PHST- 2010/09/30 06:00 [medline]
PHST- 2009/07/01 00:00 [pmc-release]
AID - 10.4085/1062-6050-44.4.356 [doi]
PST - ppublish
SO  - J Athl Train. 2009 Jul-Aug;44(4):356-62. doi: 10.4085/1062-6050-44.4.356.