PMID- 26561721
OWN - NLM
STAT- MEDLINE
DCOM- 20170425
LR  - 20170425
IS  - 1555-0273 (Electronic)
IS  - 1555-0265 (Linking)
VI  - 11
IP  - 5
DP  - 2016 Jul
TI  - Lower-Body Muscle Structure and Jump Performance of Stronger and Weaker Surfing 
      Athletes.
PG  - 652-7
LID - 10.1123/ijspp.2015-0481 [doi]
AB  - PURPOSE: To identify whether there are any significant differences in the 
      lower-body muscle structure and countermovement-jump (CMJ) and squat-jump (SJ) 
      performance between stronger and weaker surfing athletes. METHODS: Twenty elite 
      male surfers had their lower-body muscle structure assessed with ultrasonography 
      and completed a series of lower-body strength and jump tests including isometric 
      midthigh pull (IMTP), CMJ, and SJ. Athletes were separated into stronger (n = 10) 
      and weaker (n = 10) groups based on IMTP performance. RESULTS: Large significant 
      differences were identified between the groups for vastus lateralis (VL) 
      thickness (P = .02, ES = 1.22) and lateral gastrocnemius (LG) pennation angle (P 
      = .01, ES = 1.20), and a large nonsignificant difference was identified in LG 
      thickness (P = .08, ES = 0.89). Furthermore, significant differences were present 
      between the groups for peak force, relative peak force, and jump height in the 
      CMJ and SJ (P < .01-.05, ES = 0.90-1.47) and eccentric peak velocity, as well as 
      vertical displacement of the center of mass during the CMJ (P < .01, ES = 
      1.40-1.41). CONCLUSION: Stronger surfing athletes in this study had greater VL 
      and LG thickness and LG pennation angle. These muscle structures may explain 
      their better performance in the CMJ and SJ. A unique finding in this study was 
      that the stronger group appeared to better use their strength and muscle 
      structure for braking as they had significantly higher eccentric peak velocity 
      and vertical displacement during the CMJ. This enhanced eccentric phase may have 
      resulted in a greater production and subsequent utilization of stored elastic 
      strain energy that led to the significantly better CMJ performance in the 
      stronger group.
FAU - Secomb, Josh L
AU  - Secomb JL
AD  - Hurley Surfing Australia High Performance Centre, Casuarina Beach, Australia.
FAU - Nimphius, Sophia
AU  - Nimphius S
FAU - Farley, Oliver R
AU  - Farley OR
FAU - Lundgren, Lina
AU  - Lundgren L
FAU - Tran, Tai T
AU  - Tran TT
FAU - Sheppard, Jeremy M
AU  - Sheppard JM
LA  - eng
PT  - Journal Article
DEP - 20151109
PL  - United States
TA  - Int J Sports Physiol Perform
JT  - International journal of sports physiology and performance
JID - 101276430
SB  - IM
MH  - Athletes
MH  - Athletic Performance/*physiology
MH  - *Exercise Test
MH  - Humans
MH  - Isometric Contraction/physiology
MH  - Lower Extremity/physiology
MH  - Male
MH  - Muscle Strength/physiology
MH  - Muscle, Skeletal/anatomy & histology/*diagnostic imaging/physiology
MH  - Ultrasonography
MH  - Young Adult
EDAT- 2015/11/13 06:00
MHDA- 2017/04/26 06:00
CRDT- 2015/11/13 06:00
PHST- 2015/11/13 06:00 [entrez]
PHST- 2015/11/13 06:00 [pubmed]
PHST- 2017/04/26 06:00 [medline]
AID - 2015-0481 [pii]
AID - 10.1123/ijspp.2015-0481 [doi]
PST - ppublish
SO  - Int J Sports Physiol Perform. 2016 Jul;11(5):652-7. doi: 10.1123/ijspp.2015-0481. 
      Epub 2015 Nov 9.