PMID- 35173377
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20220219
IS  - 0860-021X (Print)
IS  - 2083-1862 (Electronic)
IS  - 0860-021X (Linking)
VI  - 39
IP  - 1
DP  - 2022 Jan
TI  - Comparing the effects of plyometric and isometric strength training on dynamic 
      and isometric force-time characteristics.
PG  - 189-197
LID - 10.5114/biolsport.2022.103575 [doi]
AB  - The purpose of the study was to compare the change in dynamic and isometric 
      force-time characteristics after plyometric (PLYO) or isometric strength training 
      (ISO). Twenty-two endurance runners (age = 37 +/- 6 years, stature = 1.71 +/- 0.05 m, 
      body mass = 62.7 +/- 8.6 kg, weekly mileage = 47.3 +/- 10.8 km) performed a 
      countermovement jump (CMJ) and isometric mid-thigh pull (IMTP) test during pre- 
      and post-tests. They were then randomly assigned to either PLYO or ISO group and 
      completed 12 sessions of intervention over six weeks. The PLYO included drop 
      jump, single leg bounding and split jump, and the ISO included IMTP and isometric 
      ankle plantar flexion. Significant and large time x group interactions were 
      observed for CMJ countermovement depth (P = 0.037, n(2)(p) = 0.21) and IMTP and 
      relative peak force (PF) (P = 0.030, n((2)) (p) = 0.22). Significant and large main 
      effects for time were observed in CMJ height, peak power, propulsive phase 
      duration, countermovement depth, reactive strength index modified, IMTP PF and 
      relative PF (P < 0.05, 0.20 </= n(2)(p) </= 0.65). Effect for time showed small 
      improvement in CMJ height for both PLYO (P < 0.001, d = 0.48) and ISO (P = 0.009, 
      d = 0.47), small improvement in CMJ PP in PLYO (P = 0.020, d = 0.21), large 
      increase in countermovement depth (P = 0.004, d = 1.02) and IMTP relative PF (P < 
      0.001, d = 0.87), and moderate increase in propulsive phase duration (P = 0.038, 
      d = 0.65) and IMTP PF (P < 0.001, d = 0.55) in ISO. There were large differences 
      between groups for percentage change in countermovement depth (P = 0.003, d = 
      0.96) and IMTP relative PF (P = 0.047, d = 0.90). In conclusion, both PLYO and 
      ISO improved CMJ jump height via different mechanisms, while only ISO resulted in 
      improved IMTP PF and relative PF.
CI  - Copyright (c) Biology of Sport 2021.
FAU - Lum, Danny
AU  - Lum D
AD  - Sport Science and Sport Medicine, Singapore Sport Institute, Singapore, 
      Singapore.
AD  - Physical Education and Sports Science, National Institute of Education, Nanyang 
      Technological University, Singapore, Singapore.
FAU - Comfort, Paul
AU  - Comfort P
AD  - Directorate of Sport, Exercise, and Physiotherapy, University of Salford, 
      Salford, Greater Manchester M6 6PU, UK.
AD  - Centre for Exercise and Sports Science Research, Edith Cowan University, 
      Joondalup, WA 6027, Australia.
FAU - Barbosa, Tiago M
AU  - Barbosa TM
AD  - Physical Education and Sports Science, National Institute of Education, Nanyang 
      Technological University, Singapore, Singapore.
AD  - Polytechnic Institute of Braganca, Braganca, Portugal.
AD  - Research Centre in Sports, Health and Human Development (CIDESD), Vila Real, 
      Portugal.
FAU - Balasekaran, Govindasamy
AU  - Balasekaran G
AD  - Physical Education and Sports Science, National Institute of Education, Nanyang 
      Technological University, Singapore, Singapore.
LA  - eng
PT  - Journal Article
DEP - 20210307
PL  - Poland
TA  - Biol Sport
JT  - Biology of sport
JID - 8700872
PMC - PMC8805362
OTO - NOTNLM
OT  - Countermovement jump
OT  - Isometric mid-thigh pull
OT  - Peak power
OT  - Reactive strength index modified
COIS- The authors declared no conflict of interest.
EDAT- 2022/02/18 06:00
MHDA- 2022/02/18 06:01
PMCR- 2022/01/01
CRDT- 2022/02/17 05:32
PHST- 2020/11/28 00:00 [received]
PHST- 2021/01/09 00:00 [revised]
PHST- 2021/02/01 00:00 [accepted]
PHST- 2022/02/17 05:32 [entrez]
PHST- 2022/02/18 06:00 [pubmed]
PHST- 2022/02/18 06:01 [medline]
PHST- 2022/01/01 00:00 [pmc-release]
AID - 103575 [pii]
AID - 10.5114/biolsport.2022.103575 [doi]
PST - ppublish
SO  - Biol Sport. 2022 Jan;39(1):189-197. doi: 10.5114/biolsport.2022.103575. Epub 2021 
      Mar 7.