PMID- 31269001
OWN - NLM
STAT- MEDLINE
DCOM- 20200309
LR  - 20200309
IS  - 1533-4287 (Electronic)
IS  - 1064-8011 (Linking)
VI  - 33
IP  - 12
DP  - 2019 Dec
TI  - Effect of Altering Body Posture and Barbell Position on the Within-Session 
      Reliability and Magnitude of Force-Time Curve Characteristics in the Isometric 
      Midthigh Pull.
PG  - 3252-3262
LID - 10.1519/JSC.0000000000003254 [doi]
AB  - Guppy, SN, Brady, CJ, Kotani, Y, Stone, MH, Medic, N, and Haff, GG. Effect of 
      altering body posture and barbell position on the within-session reliability and 
      magnitude of force-time curve characteristics in the isometric midthigh pull. J 
      Strength Cond Res 33(12): 3252-3262, 2019-A large degree of variation in the 
      position used during isometric midthigh pull (IMTP) testing and conflicting 
      results of the effects of these changes can be found in the literature. This 
      study investigated the effect of altering body posture and barbell position on 
      the reliability and magnitude of force-time characteristics generated during the 
      IMTP. Seventeen strength-power athletes (n = 11 males, height: 177.5 +/- 7.0 cm, 
      body mass: 90.0 +/- 14.1 kg, age: 30.6 +/- 10.4 years; n = 6 females, height: 165.8 +/- 
      11.4 cm; body mass: 66.4 +/- 13.9 kg, age: 30.8 +/- 8.7 years) with greater than 6 
      months of training experience in the clean (1 repetition maximum: 118.5 +/- 20.6 
      kg, 77.5 +/- 10.4 kg) volunteered to undertake the experimental protocol. Subjects 
      performed the IMTP using 4 combinations of hip and knee angles, and 2 different 
      barbell positions. The first barbell position corresponded to the second pull of 
      the clean, while the second rested at the midpoint between the iliac crest and 
      the patella. Peak force (PF), time-specific force (F50, F90, F150, F200, and 
      F250), peak rate of force development (pRFD), and impulse (IMP) time bands were 
      reliable in all 4 testing positions examined. Statistically greater PF, F50, F90, 
      F150, F200, F250, pRFD, and IMP0-50, IMP0-90, IMP0-150, and IMP0-200 were 
      generated in a testing position corresponding to the second pull of the clean 
      when compared with a bent over torso angle, regardless of the barbell position 
      used. Moderate to large effect sizes favoring a testing position corresponding to 
      the second pull were also found. Overall, when performing the IMTP, an upright 
      torso and a barbell position that matches the second pull of the clean should be 
      used.
FAU - Guppy, Stuart N
AU  - Guppy SN
AD  - Center for Exercise and Sports Science Research, Edith Cowan University, 
      Joondalup, Australia.
FAU - Brady, Claire J
AU  - Brady CJ
AD  - Department of Physical Education and Sports Sciences, University of Limerick, 
      Limerick, Ireland.
FAU - Kotani, Yosuke
AU  - Kotani Y
AD  - Center for Exercise and Sports Science Research, Edith Cowan University, 
      Joondalup, Australia.
FAU - Stone, Michael H
AU  - Stone MH
AD  - Department of Exercise and Sport Science, Center of Excellence for Sport Science 
      and Coach Education, East Tennessee State University, Johnson City, Tennessee.
FAU - Medic, Nikola
AU  - Medic N
AD  - Center for Exercise and Sports Science Research, Edith Cowan University, 
      Joondalup, Australia.
FAU - Haff, G Gregory
AU  - Haff GG
AD  - Center for Exercise and Sports Science Research, Edith Cowan University, 
      Joondalup, Australia.
LA  - eng
PT  - Journal Article
PT  - Randomized Controlled Trial
PL  - United States
TA  - J Strength Cond Res
JT  - Journal of strength and conditioning research
JID - 9415084
SB  - IM
MH  - Adult
MH  - Exercise Test/*methods/*standards
MH  - Female
MH  - Humans
MH  - Isometric Contraction/*physiology
MH  - Knee Joint
MH  - Male
MH  - Muscle Strength/*physiology
MH  - Posture/*physiology
MH  - Reproducibility of Results
MH  - Young Adult
EDAT- 2019/07/04 06:00
MHDA- 2020/03/10 06:00
CRDT- 2019/07/04 06:00
PHST- 2019/07/04 06:00 [pubmed]
PHST- 2020/03/10 06:00 [medline]
PHST- 2019/07/04 06:00 [entrez]
AID - 10.1519/JSC.0000000000003254 [doi]
PST - ppublish
SO  - J Strength Cond Res. 2019 Dec;33(12):3252-3262. doi: 
      10.1519/JSC.0000000000003254.