biomechanics;
video analysis;
linear kinematics;
angular kinematics;
swimming performance;
CENTER-OF-MASS;
ARM COORDINATION;
RELATIVE CONTRIBUTION;
ANAEROBIC THRESHOLD;
STROKE PARAMETERS;
DISTANCE SWIMMERS;
STEP LENGTH;
SPRINT;
VELOCITY;
PACE;
D O I:
10.1123/ijspp.2015-0465
中图分类号:
Q4 [生理学];
学科分类号:
071003 ;
摘要:
Background: Coaches are often challenged to optimize swimmers' technique at different training and competition intensities, but 3-dimensional (3D) analysis has not been conducted for a wide range of training zones. Purpose: To analyze front-crawl 3D kinematics and interlimb coordination from low to severe swimming intensities. Methods: Ten male swimmers performed a 200-m front crawl at 7 incrementally increasing paces until exhaustion (0.05-m/s increments and 30-s intervals), with images from 2 cycles in each step (at the 25- and 175-m laps) being recorded by 2 surface and 4 underwater video cameras. Metabolic anaerobic threshold (AnT) was also assessed using the lactate-concentration velocity curve-modeling method. Results: Stroke frequency increased, stroke length decreased, hand and foot speed increased, and the index of interlimb coordination increased (within a catch-up mode) from low to severe intensities (P <=.05) and within the 200-m steps performed above the AnT (at or closer to the 4th step; P <= .05). Concurrently, intracyclic velocity variations and propelling efficiency remained similar between and within swimming intensities (P >.05). Conclusions: Swimming intensity has a significant impact on swimmers' segmental kinematics and interlimb coordination, with modifications being more evident after the point when AnT is reached. As competitive swimming events are conducted at high intensities (in which anaerobic metabolism becomes more prevalent), coaches should implement specific training series that lead swimmers to adapt their technique to the task constraints that exist in nonhomeostatic race conditions.
机构:
Univ La Manouba, Higher Inst Sport & Phys Educ Ksar Said, Res Unit UR17JS01, Sport Performance, Manouba, TunisiaUniv La Manouba, Higher Inst Sport & Phys Educ Ksar Said, Res Unit UR17JS01, Sport Performance, Manouba, Tunisia
Sammoud, Senda
Negra, Yassine
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Univ La Manouba, Higher Inst Sport & Phys Educ Ksar Said, Res Unit UR17JS01, Sport Performance, Manouba, TunisiaUniv La Manouba, Higher Inst Sport & Phys Educ Ksar Said, Res Unit UR17JS01, Sport Performance, Manouba, Tunisia
Negra, Yassine
Chaabene, Helmi
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机构:
Univ Potsdam, Div Training & Movement Sci, Res Focus Cognit Sci, Potsdam, Germany
Univ Jendouba, High Inst Sports & Phys Educ Kef, Jendouba, TunisiaUniv La Manouba, Higher Inst Sport & Phys Educ Ksar Said, Res Unit UR17JS01, Sport Performance, Manouba, Tunisia
Chaabene, Helmi
Bouguezzi, Raja
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Univ La Manouba, Higher Inst Sport & Phys Educ Ksar Said, Res Unit UR17JS01, Sport Performance, Manouba, TunisiaUniv La Manouba, Higher Inst Sport & Phys Educ Ksar Said, Res Unit UR17JS01, Sport Performance, Manouba, Tunisia
Bouguezzi, Raja
Attia, Ahmed
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Univ La Manouba, Higher Inst Sport & Phys Educ Ksar Said, Res Unit UR17JS01, Sport Performance, Manouba, TunisiaUniv La Manouba, Higher Inst Sport & Phys Educ Ksar Said, Res Unit UR17JS01, Sport Performance, Manouba, Tunisia
Attia, Ahmed
Granacher, Urs
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机构:
Univ Potsdam, Div Training & Movement Sci, Res Focus Cognit Sci, Potsdam, GermanyUniv La Manouba, Higher Inst Sport & Phys Educ Ksar Said, Res Unit UR17JS01, Sport Performance, Manouba, Tunisia
Granacher, Urs
Younes, Hachana
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Univ La Manouba, Higher Inst Sport & Phys Educ Ksar Said, Res Unit UR17JS01, Sport Performance, Manouba, TunisiaUniv La Manouba, Higher Inst Sport & Phys Educ Ksar Said, Res Unit UR17JS01, Sport Performance, Manouba, Tunisia
Younes, Hachana
Nevill, Alan M.
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机构:
Univ Wolverhampton, Fac Educ Hlth & Wellbeing, Walsall, EnglandUniv La Manouba, Higher Inst Sport & Phys Educ Ksar Said, Res Unit UR17JS01, Sport Performance, Manouba, Tunisia
机构:
Univ Rennes 2, M2S Lab Movement Sport & Hlth, ENS Rennes, Bruz, France
INRIA Rennes Bretagne Atlantique, MIMETIC Anal Synth Approach Virtual Human Simulat, Rennes, France
CREST Ctr Res Econ & Stat, ENSAI, Rennes, FranceUniv Rennes 2, M2S Lab Movement Sport & Hlth, ENS Rennes, Bruz, France
Bouvet, Antoine
Pla, Robin
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机构:
French Swimming Federat, Performance Optimisat Dept, Clichy, France
Univ Paris Cite, IRMES Inst Rech Med & Epidemiol Sport, Paris, FranceUniv Rennes 2, M2S Lab Movement Sport & Hlth, ENS Rennes, Bruz, France
Pla, Robin
Delhaye, Erwan
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h-index: 0
机构:
Univ Rennes 2, M2S Lab Movement Sport & Hlth, ENS Rennes, Bruz, France
INRIA Rennes Bretagne Atlantique, MIMETIC Anal Synth Approach Virtual Human Simulat, Rennes, FranceUniv Rennes 2, M2S Lab Movement Sport & Hlth, ENS Rennes, Bruz, France
Delhaye, Erwan
Nicolas, Guillaume
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h-index: 0
机构:
Univ Rennes 2, M2S Lab Movement Sport & Hlth, ENS Rennes, Bruz, France
INRIA Rennes Bretagne Atlantique, MIMETIC Anal Synth Approach Virtual Human Simulat, Rennes, FranceUniv Rennes 2, M2S Lab Movement Sport & Hlth, ENS Rennes, Bruz, France
Nicolas, Guillaume
Bideau, Nicolas
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h-index: 0
机构:
Univ Rennes 2, M2S Lab Movement Sport & Hlth, ENS Rennes, Bruz, France
INRIA Rennes Bretagne Atlantique, MIMETIC Anal Synth Approach Virtual Human Simulat, Rennes, FranceUniv Rennes 2, M2S Lab Movement Sport & Hlth, ENS Rennes, Bruz, France