PMID- 31672928
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20231026
IS  - 1555-0273 (Electronic)
IS  - 1555-0265 (Linking)
VI  - 15
IP  - 4
DP  - 2020 Apr 1
TI  - Effects of In-Season Velocity- Versus Percentage-Based Training in Academy Rugby 
      League Players.
PG  - 554-561
LID - 10.1123/ijspp.2019-0058 [doi]
AB  - PURPOSE: To compare the effects of velocity-based training (VBT) vs 
      percentage-based training (PBT) on strength, speed, and jump performance in 
      academy rugby league players during a 7-wk in-season mesocycle. METHODS: A total 
      of 27 rugby league players competing in the Super League U19s Championship were 
      randomized to VBT (n = 12) or PBT (n = 15). Both groups completed a 7-wk 
      resistance-training intervention (2x/wk) that involved the back squat. The PBT 
      group used a fixed load based on a percentage of 1-repetition maximum (1-RM), 
      whereas the VBT group used a modifiable load based on individualized velocity 
      thresholds. Biomechanical and perceptual data were collected during each training 
      session. Back-squat 1-RM, countermovement jump, reactive strength index, sprint 
      times, and back-squat velocity at 40-90% 1-RM were assessed pretraining and 
      posttraining. RESULTS: The PBT group showed likely to most likely improvements in 
      1-RM strength and reactive strength index, whereas the VBT group showed likely to 
      very likely improvements in 1-RM strength, countermovement jump height, and 
      back-squat velocity at 40% and 60% 1-RM. Sessional velocity and power were most 
      likely greater during VBT compared with PBT (standardized mean differences = 
      1.8-2.4), while time under tension and perceptual training stress were likely 
      lower (standardized mean differences = 0.49-0.66). The improvement in back-squat 
      velocity at 60% 1-RM was likely greater following VBT compared with PBT 
      (standardized mean difference = 0.50). CONCLUSION: VBT can be implemented during 
      the competitive season, instead of traditional PBT, to improve training stimuli, 
      decrease training stress, and promote velocity-specific adaptations.
FAU - Orange, Samuel T
AU  - Orange ST
FAU - Metcalfe, James W
AU  - Metcalfe JW
FAU - Robinson, Ashley
AU  - Robinson A
FAU - Applegarth, Mark J
AU  - Applegarth MJ
FAU - Liefeith, Andreas
AU  - Liefeith A
LA  - eng
PT  - Journal Article
DEP - 20191030
PL  - United States
TA  - Int J Sports Physiol Perform
JT  - International journal of sports physiology and performance
JID - 101276430
SB  - IM
OTO - NOTNLM
OT  - competitive season
OT  - load-velocity relationship
OT  - resistance training
OT  - training load
OT  - velocity-based training
EDAT- 2019/11/02 06:00
MHDA- 2019/11/02 06:01
CRDT- 2019/11/02 06:00
PHST- 2019/01/22 00:00 [received]
PHST- 2019/07/22 00:00 [revised]
PHST- 2019/07/23 00:00 [accepted]
PHST- 2019/11/02 06:01 [medline]
PHST- 2019/11/02 06:00 [pubmed]
PHST- 2019/11/02 06:00 [entrez]
AID - ijspp.2019-0058 [pii]
AID - 10.1123/ijspp.2019-0058 [doi]
PST - epublish
SO  - Int J Sports Physiol Perform. 2019 Oct 30;15(4):554-561. doi: 
      10.1123/ijspp.2019-0058. Print 2020 Apr 1.