scholarly journals Muscle-Tendon Interaction During Human Dolphin-Kick Swimming

2019 ◽  
Vol 10 ◽  
Author(s):  
Kanae Sano ◽  
Takumi Sakamoto ◽  
Ryoma Nishimura ◽  
Yoshito Danno ◽  
Paavo V. Komi ◽  
...  
Keyword(s):  
Dolphin Kick

Relationship between dolphin kick movement in humans and velocity during undulatory underwater swimming

2021 ◽  
pp. 1-7
Author(s):  
Yusuke Ikeda ◽  
Hiroshi Ichikawa ◽  
Hirofumi Shimojo ◽  
Rio Nara ◽  
Yasuhiro Baba ◽  
...  
Keyword(s):  
Dolphin Kick

The Relationship Between Dolphin Kick Movement And Underwater EMG Of Lower Leg Muscles In Competitive Swimmers

2016 ◽  
Vol 48 ◽  
pp. 441
Author(s):  
Tadashi Wada ◽  
Noriyuki Yamamoto ◽  
Yoshimitsu Shimoyama ◽  
Yukinoti Shintaku ◽  
Hirofumi Jigami ◽  
...  
Keyword(s):  
Lower Leg ◽  
Leg Muscles ◽  
Dolphin Kick ◽  
The Relationship ◽  
Competitive Swimmers

scholarly journals Greater Lumbar Extension During Dolphin Kick and Psoas Major Tightness in Swimmers With Low Back Pain

2020 ◽  
Vol 29 (6) ◽  
pp. 716-722
Author(s):  
Gakuto Kitamura ◽  
Hiroshige Tateuchi ◽  
Noriaki Ichihashi
Keyword(s):  
Low Back Pain ◽  
Elastic Moduli ◽  
Control Group ◽  
Low Back ◽  
Pectoralis Minor ◽  
Male College ◽  
Psoas Major ◽  
Lumbar Extension ◽  
Dolphin Kick ◽  
Hip Extension

Context:In competitive swimming, many swimmers experience low back pain (LBP). Lumbar hyperextension may cause LBP, and tight hip-flexor muscle may cause lumbar extension during swimming.Objective:The purpose of this study was to clarify the features of the elastic moduli of the muscles and the lumbar extension when swimmers with LBP perform a dolphin kick (DK).Design:Cross-sectional study.Setting:Single center.Other Participants:Eleven male college swimmers were enrolled as the LBP group (who have LBP when swimming and during a lumbar extension), and 21 male college swimmers were recruited as the control group (no LBP).Interventions:The elastic moduli of the psoas major, iliacus, teres major, latissimus dorsi, pectoralis major, and pectoralis minor were measured through ultrasonic shear wave elastography. The lumbar and hip extension angles during a DK were measured using a video camera. The passive hip extension and shoulder-flexion range of motion (ROM) were measured using a goniometer.Main Outcome Measures:Muscle elastic moduli and lumbar extension angles during DK.Results:The characteristics, muscle elastic moduli, DK motion, and ROM were compared between the 2 groups. LBP group demonstrated significantly higher elastic modulus of the psoas major and lower modulus of pectoralis minor compared with the control group. Also, LBP group showed greater lumbar extension during a DK and less hip extension ROM than the control group.Conclusions:The higher elastic modulus of the psoas major and greater lumbar extension during a DK may be related to the LBP in swimmers.

scholarly journals Simulation analysis of thrusts and joint torques during underwater dolphin kick

2008 ◽  
Vol 32 (2) ◽  
pp. 90-97 ◽  
Author(s):  
Seiji SUGIMOTO ◽  
Motomu NAKASHIMA ◽  
Hiroshi ICHIKAWA ◽  
Takeo NOMURA
Keyword(s):  
Simulation Analysis ◽  
Joint Torques ◽  
Dolphin Kick

Propulsive Efficiency of the Underwater Dolphin Kick in Humans

2009 ◽  
Vol 131 (5) ◽  
Author(s):  
Alfred von Loebbecke ◽  
Rajat Mittal ◽  
Frank Fish ◽  
Russell Mark
Keyword(s):  
Fluid Dynamic ◽  
Three Dimensional ◽  
Underwater Video ◽  
Dynamic Simulations ◽  
Slender Body Theory ◽  
Propulsive Efficiency ◽  
Video Footage ◽  
Wide Range ◽  
Dolphin Kick ◽  
Body Theory

Three-dimensional fully unsteady computational fluid dynamic simulations of five Olympic-level swimmers performing the underwater dolphin kick are used to estimate the swimmer’s propulsive efficiencies. These estimates are compared with those of a cetacean performing the dolphin kick. The geometries of the swimmers and the cetacean are based on laser and CT scans, respectively, and the stroke kinematics is based on underwater video footage. The simulations indicate that the propulsive efficiency for human swimmers varies over a relatively wide range from about 11% to 29%. The efficiency of the cetacean is found to be about 56%, which is significantly higher than the human swimmers. The computed efficiency is found not to correlate with either the slender body theory or with the Strouhal number.

Optimization of knee joint maximum angle on dolphin kick

2020 ◽  
Vol 32 (6) ◽  
pp. 067105
Author(s):  
M. Yamakawa ◽  
N. Mizuno ◽  
S. Asao ◽  
M. Tanaka ◽  
K. Tajiri
Keyword(s):  
Knee Joint ◽  
Maximum Angle ◽  
Dolphin Kick

A comparison of the kinematics of the dolphin kick in humans and cetaceans

2009 ◽  
Vol 28 (1) ◽  
pp. 99-112 ◽  
Author(s):  
Alfred von Loebbecke ◽  
Rajat Mittal ◽  
Frank Fish ◽  
Russell Mark
Keyword(s):  
Dolphin Kick

EFFECT OF ADDING A DOLPHIN KICK TO A BREASTSTROKE PULLOUT

2008 ◽  
Vol 40 (Supplement) ◽  
pp. S377 ◽  
Author(s):  
Scott P. McLean ◽  
Rod Havriluk ◽  
Steve Brandt
Keyword(s):  
Dolphin Kick
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