PMID- 38085628
OWN - NLM
STAT- MEDLINE
DCOM- 20231216
LR  - 20231216
IS  - 1533-4287 (Electronic)
IS  - 1064-8011 (Linking)
VI  - 38
IP  - 1
DP  - 2024 Jan 1
TI  - Validity and Reliability of Force-Time Characteristics Using a Portable Load Cell 
      for the Isometric Midthigh Pull.
PG  - 185-191
LID - 10.1519/JSC.0000000000004672 [doi]
AB  - Pichardo, AW, Neville, J, Tinwala, F, Cronin, JB, and Brown, SR. Validity and 
      reliability of force-time characteristics using a portable load cell for the 
      isometric midthigh pull. J Strength Cond Res 38(1): 185-191, 2024-Many 
      practitioners use the isometric midthigh pull (IMTP) to assess maximal strength 
      in a safe, time-effective manner. However, expensive, stationary force plates are 
      not always practical in a large team setting. Therefore, the purpose of this 
      study was to establish the validity and between-session reliability of peak 
      force, rate of force development (RFD), and impulse during an IMTP using 2 
      experimental protocols: a traditional fixed bar with a force plate (BarFP) and a 
      flexible chain measured with a force plate (ChainFP) and a load cell (ChainLC). 
      After a familiarization session, 13 resistance-trained men performed 3 trials of 
      the BarFP condition and 3 trials of the chain-based conditions. The identical 
      procedures were replicated twice more, with a week between each testing session. 
      The main findings were (a) no RFD or impulse measures were found to achieve 
      acceptable reliability across all methodological approaches and testing 
      occasions; (b) peak force was reliable across all methods, with coefficient of 
      variation ranging from 4.6 to 8.3%, intraclass correlation coefficient ranging 
      from 0.94 to 0.98, and the least variability associated with the ChainLC 
      condition; and (c) the ChainFP method was found to significantly underrepresent 
      peak force by 4.8% (p < 0.05), with no significant differences between the 
      ChainLC and BarFP methods. Therefore, the ChainLC would seem a valid, reliable, 
      portable, and cost-effective alternative to force plates when assessing maximal 
      isometric strength in the IMTP.
CI  - Copyright (c) 2023 National Strength and Conditioning Association.
FAU - Pichardo, Andrew W
AU  - Pichardo AW
AUID- ORCID: 0000-0002-5145-5924
AD  - IMG Academy, Athletic and Personal Development, Bradenton, Florida.
FAU - Neville, Jono
AU  - Neville J
AD  - Sports Performance Research Institute New Zealand (SPRINZ), School of Sport and 
      Recreation, Faculty of Health and Environmental Sciences, Auckland University of 
      Technology, Auckland, New Zealand.
AD  - School of Engineering, Computer and Mathematical Sciences, Department of Creative 
      Technologies, Auckland University of Technology, Auckland, New Zealand.
FAU - Tinwala, Farhan
AU  - Tinwala F
AD  - Sports Performance Research Institute New Zealand (SPRINZ), School of Sport and 
      Recreation, Faculty of Health and Environmental Sciences, Auckland University of 
      Technology, Auckland, New Zealand.
AD  - School of Engineering, Computer and Mathematical Sciences, Department of Creative 
      Technologies, Auckland University of Technology, Auckland, New Zealand.
AD  - High Performance Sport New Zealand, Auckland, New Zealand; and.
FAU - Cronin, John B
AU  - Cronin JB
AD  - Sports Performance Research Institute New Zealand (SPRINZ), School of Sport and 
      Recreation, Faculty of Health and Environmental Sciences, Auckland University of 
      Technology, Auckland, New Zealand.
FAU - Brown, Scott R
AU  - Brown SR
AD  - Department of Kinesiology, Aquinas College, Grand Rapids, Michigan.
LA  - eng
PT  - Journal Article
PL  - United States
TA  - J Strength Cond Res
JT  - Journal of strength and conditioning research
JID - 9415084
SB  - IM
MH  - Male
MH  - Humans
MH  - Reproducibility of Results
MH  - *Muscle Strength
MH  - *Exercise Test/methods
MH  - Isometric Contraction
MH  - Correlation of Data
EDAT- 2023/12/12 18:42
MHDA- 2023/12/17 09:45
CRDT- 2023/12/12 12:23
PHST- 2023/12/17 09:45 [medline]
PHST- 2023/12/12 18:42 [pubmed]
PHST- 2023/12/12 12:23 [entrez]
AID - 00124278-202401000-00023 [pii]
AID - 10.1519/JSC.0000000000004672 [doi]
PST - ppublish
SO  - J Strength Cond Res. 2024 Jan 1;38(1):185-191. doi: 10.1519/JSC.0000000000004672.