PMID- 29140148
OWN - NLM
STAT- MEDLINE
DCOM- 20180808
LR  - 20180808
IS  - 1555-0273 (Electronic)
IS  - 1555-0265 (Linking)
VI  - 13
IP  - 6
DP  - 2018 Jul 1
TI  - The Reliability of Individualized Load-Velocity Profiles.
PG  - 763-769
LID - 10.1123/ijspp.2017-0610 [doi]
AB  - PURPOSE: To examine the reliability of peak velocity (PV), mean propulsive 
      velocity (MPV), and mean velocity (MV) in the development of load-velocity 
      profiles (LVP) in the full-depth free-weight back squat performed with maximal 
      concentric effort. METHODS: Eighteen resistance-trained men performed a baseline 
      1-repetition maximum (1-RM) back-squat trial and 3 subsequent 1-RM trials used 
      for reliability analyses, with 48-h intervals between trials. 1-RM trials 
      comprised lifts from 6 relative loads including 20%, 40%, 60%, 80%, 90%, and 100% 
      1-RM. Individualized LVPs for PV, MPV, or MV were derived from loads that were 
      highly reliable based on the following criteria: intraclass correlation 
      coefficient (ICC) >.70, coefficient of variation (CV) </=10%, and Cohen d effect 
      size (ES) <0.60. RESULTS: PV was highly reliable at all 6 loads. MPV and MV were 
      highly reliable at 20%, 40%, 60%, 80%, and 90% but not 100% 1-RM (MPV: ICC = .66, 
      CV = 18.0%, ES = 0.10, SEM = 0.04 m.s(-1); MV: ICC = .55, CV = 19.4%, ES = 0.08, 
      SEM = 0.04 m.s(-1)). When considering the reliable ranges, almost perfect 
      correlations were observed for LVPs derived from PV(20-100%) (r = .91-.93), 
      MPV(20-90%) (r = .92-.94), and MV(20-90%) (r = .94-.95). Furthermore, the LVPs 
      were not significantly different (P > .05) between trials or movement velocities 
      or between linear regression versus 2nd-order polynomial fits. CONCLUSIONS: 
      PV(20-100%), MPV(20-90%), and MV(20-90%) are reliable and can be utilized to 
      develop LVPs using linear regression. Conceptually, LVPs can be used to monitor 
      changes in movement velocity and employed as a method for adjusting sessional 
      training loads according to daily readiness.
FAU - Banyard, Harry G
AU  - Banyard HG
FAU - Nosaka, Kazunori
AU  - Nosaka K
FAU - Vernon, Alex D
AU  - Vernon AD
FAU - Haff, G Gregory
AU  - Haff GG
LA  - eng
PT  - Journal Article
DEP - 20180710
PL  - United States
TA  - Int J Sports Physiol Perform
JT  - International journal of sports physiology and performance
JID - 101276430
SB  - IM
MH  - Adult
MH  - Biomechanical Phenomena
MH  - Humans
MH  - Linear Models
MH  - Male
MH  - Movement
MH  - Reproducibility of Results
MH  - Resistance Training/*methods
MH  - Weight Lifting/*physiology
OTO - NOTNLM
OT  - back squat
OT  - mean propulsive velocity
OT  - mean velocity
OT  - peak velocity
OT  - velocity-based training
EDAT- 2017/11/16 06:00
MHDA- 2018/08/09 06:00
CRDT- 2017/11/16 06:00
PHST- 2017/11/16 06:00 [pubmed]
PHST- 2018/08/09 06:00 [medline]
PHST- 2017/11/16 06:00 [entrez]
AID - 10.1123/ijspp.2017-0610 [doi]
PST - ppublish
SO  - Int J Sports Physiol Perform. 2018 Jul 1;13(6):763-769. doi: 
      10.1123/ijspp.2017-0610. Epub 2018 Jul 10.