PMID- 33170820
OWN - NLM
STAT- MEDLINE
DCOM- 20210702
LR  - 20230822
IS  - 1530-0315 (Electronic)
IS  - 0195-9131 (Linking)
VI  - 53
IP  - 5
DP  - 2021 May 1
TI  - Site-specific Concurrent Validity of the ActiGraph GT9X Link in the Estimation of 
      Activity-related Skeletal Loading.
PG  - 951-959
LID - 10.1249/MSS.0000000000002562 [doi]
AB  - PURPOSE: The aims of this project were twofold: 1) to assess the concurrent 
      validity of raw accelerometer outputs with ground reaction forces (GRF) and 
      loading rates (LR) calculated from force plate across a range of simulated 
      habitual PA and 2) to identify the optimal wear site among the ankle, hip, and 
      wrist with the strongest relationships between accelerometer and force plate 
      and/or skeletal outcomes. METHODS: Thirty healthy young adults (23.0 +/- 4.5 yr, 
      50% female) wore a triaxial accelerometer at the right ankle, hip, and wrist 
      while performing eight trials of walking, jogging, running, low box drops, and 
      high box drops over an in-ground force plate. Repeated-measures correlations and 
      linear mixed models were used to assess concurrent validity of accelerometer and 
      force plate outcomes across wear sites. RESULTS: Strong repeated-measures 
      associations were observed between peak hip resultant acceleration and resultant 
      LR (rrm 1169 = 0.74, P < 0.001, 95% confidence interval = 0.718, 0.769) and peak 
      hip resultant accelerations and resultant GRF (rrm 1169 = 0.69, P < 0.001, 95% 
      confidence interval = 0.660, 0.720) when data were combined across activities. By 
      contrast, small to moderate associations were seen between ankle-based outcomes 
      and corresponding GRF and LR during walking and jogging (rrm 209 = 0.17-0.34, all 
      P < 0.001). No significant associations were seen with wrist-based outcomes 
      during any activity. In addition, linear mixed models suggested that 24%-50% of 
      the variability in peak GRF and LR could be attributed to measured accelerations 
      at the hip. CONCLUSION: Peak accelerations measured at the hip were identified as 
      the strongest proxies for skeletal loading assessed via force plate.
CI  - Copyright (c) 2020 by the American College of Sports Medicine.
FAU - Higgins, Simon
AU  - Higgins S
AD  - Department of Exercise Science, Elon University, Elon, NC.
FAU - Higgins, Lauren Q
AU  - Higgins LQ
AD  - Department of Kinesiology, University of North Carolina at Greensboro, 
      Greensboro, NC.
FAU - Vallabhajosula, Srikant
AU  - Vallabhajosula S
AD  - Department of Physical Therapy Education, Elon University, Elon, NC.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - United States
TA  - Med Sci Sports Exerc
JT  - Medicine and science in sports and exercise
JID - 8005433
SB  - IM
MH  - *Acceleration
MH  - Accelerometry/*instrumentation
MH  - Actigraphy
MH  - Adult
MH  - Biomechanical Phenomena/physiology
MH  - Bone and Bones/*physiology
MH  - Confidence Intervals
MH  - Female
MH  - Humans
MH  - Jogging/physiology
MH  - Linear Models
MH  - Male
MH  - Reproducibility of Results
MH  - Running/*physiology
MH  - Walking/*physiology
MH  - Young Adult
EDAT- 2020/11/11 06:00
MHDA- 2021/07/03 06:00
CRDT- 2020/11/10 17:11
PHST- 2020/11/11 06:00 [pubmed]
PHST- 2021/07/03 06:00 [medline]
PHST- 2020/11/10 17:11 [entrez]
AID - 00005768-202105000-00009 [pii]
AID - 10.1249/MSS.0000000000002562 [doi]
PST - ppublish
SO  - Med Sci Sports Exerc. 2021 May 1;53(5):951-959. doi: 
      10.1249/MSS.0000000000002562.