PMID- 26217049
OWN - NLM
STAT- MEDLINE
DCOM- 20161213
LR  - 20161230
IS  - 1555-0273 (Electronic)
IS  - 1555-0265 (Linking)
VI  - 11
IP  - 2
DP  - 2016 Mar
TI  - Effect of Sampling Frequency on Isometric Midthigh-Pull Kinetics.
PG  - 255-60
LID - 10.1123/ijspp.2015-0222 [doi]
AB  - PURPOSE: Skeletal-muscle function can be evaluated using force-times curves 
      generated via the isometric midthigh pull (IMTP). Various sampling frequencies 
      (500-1000 Hz) have been used for IMTP assessments; however, no research has 
      investigated the influence of sampling frequency on IMTP kinetics. Therefore, the 
      purpose of this study was to investigate the influence of sampling frequency on 
      kinetic variables during the IMTP, including peak force, time-specific force 
      values (100, 150, and 200 ms), and rate of force development (RFD) at 3 time 
      bands (0-100, 0-150, 0-200 ms). METHODS: Academy rugby league players (n = 30, 
      age 17.5 +/- 1.1 y, height 1.80 +/- 0.06 m, mass 85.4 +/- 10.3 kg) performed 3 IMTP 
      trials on a force platform sampling at 2000 Hz, which was subsequently 
      down-sampled to 1500, 1000, and 500 Hz for analysis. RESULTS: Intraclass 
      correlation coefficients (ICC) and coefficients of variation (CV) demonstrated 
      high within-session reliability for all force and RFD variables across all 
      sampling frequencies (ICC >/= .80, CV </= 10.1%). Repeated-measures analysis of 
      variance revealed no significant differences (P > .05, Cohen d </= 0.009) in 
      kinetic variables between sampling frequencies. Overall, high reliability was 
      observed across all sampling frequencies for all kinetic variables, with no 
      significant differences (P > .05) for each kinetic variable across sampling 
      frequencies. CONCLUSIONS: Practitioners and scientists may consider sampling as 
      low as 500 Hz when measuring peak force, time-specific force values, and RFD at 
      predetermined time bands during the IMTP for accurate and reliable data.
FAU - Dos'Santos, Thomas
AU  - Dos'Santos T
AD  - Human Performance Laboratory, University of Salford, Greater Manchester, UK.
FAU - Jones, Paul A
AU  - Jones PA
FAU - Kelly, Jonathan
AU  - Kelly J
FAU - McMahon, John J
AU  - McMahon JJ
FAU - Comfort, Paul
AU  - Comfort P
FAU - Thomas, Christopher
AU  - Thomas C
LA  - eng
PT  - Journal Article
PT  - Retracted Publication
DEP - 20150727
PL  - United States
TA  - Int J Sports Physiol Perform
JT  - International journal of sports physiology and performance
JID - 101276430
SB  - IM
RIN - Int J Sports Physiol Perform. 2019 Mar 1;14(3):412. PMID: 30764680
MH  - Adolescent
MH  - Analysis of Variance
MH  - Athletes
MH  - Biomechanical Phenomena
MH  - Exercise Test/*methods
MH  - Football
MH  - Humans
MH  - Isometric Contraction/*physiology
MH  - Male
MH  - Muscle Strength/*physiology
MH  - Muscle, Skeletal/*physiology
MH  - Reproducibility of Results
MH  - Thigh/*physiology
EDAT- 2015/07/29 06:00
MHDA- 2016/12/15 06:00
CRDT- 2015/07/29 06:00
PHST- 2015/07/29 06:00 [entrez]
PHST- 2015/07/29 06:00 [pubmed]
PHST- 2016/12/15 06:00 [medline]
AID - 2015-0222 [pii]
AID - 10.1123/ijspp.2015-0222 [doi]
PST - ppublish
SO  - Int J Sports Physiol Perform. 2016 Mar;11(2):255-60. doi: 
      10.1123/ijspp.2015-0222. Epub 2015 Jul 27.