Marek Strzała1, Arkadiusz Stanula2, Andrzej Ostrowski3, Marcin Kaca3, Piotr Krężałek4, Jacek Głodzik4. 1. Department of Water Sports, University School of Physical Education, Kraków, Poland - marekstrzala@o2.pl. 2. Department of Sports Training, The Jerzy Kukuczka Academy of Physical Education, Katowice, Poland. 3. Department of Water Sports, University School of Physical Education, Kraków, Poland. 4. Department of Physiotherapy, University School of Physical Education, Kraków, Poland.
Abstract
BACKGROUND: This work aimed at examining how coordination and kinematic indices interplay with swimming performance measured by average speed in 50 m all-out test. METHODS: The group of 34 male competitive swimmers (19.1±1.91 years old) participated in the study. The underwater movements of swimmers' bodies were recorded providing side-shots. Accelerations and angular velocity of pitch rotation of swimmer's sacrum were measured with inertial sensor device (three-axial accelerometer and gyroscope). RESULTS: Indices calculated on the basis of video analysis as well as their relationship with speed (V50surface breast) clearly show, that stroke rate (SR) kinematic and ample arm propulsion (AP) duration impulse are both highly associated with performance. At the same time V50surface breast is highly related to significant shortening inter-cycle gap - Glide or Overlap. The study shows, that sagittal maximal ventral acceleration (Azmax) and sagittal amplitude acceleration (Azamp) significantly interplay with V50surface breast (0.54, P<0.01 and 0.45, P=0.01 respectively), which is connected with dolphin-like body waving. CONCLUSIONS: The most important thing is to recognize possible gains coming from suitably shaped dolphin-like body waving, as well as to enhance this specific action during well-timed upper trunk and head immersion in each sprint breaststroke cycle.
BACKGROUND: This work aimed at examining how coordination and kinematic indices interplay with swimming performance measured by average speed in 50 m all-out test. METHODS: The group of 34 male competitive swimmers (19.1±1.91 years old) participated in the study. The underwater movements of swimmers' bodies were recorded providing side-shots. Accelerations and angular velocity of pitch rotation of swimmer's sacrum were measured with inertial sensor device (three-axial accelerometer and gyroscope). RESULTS: Indices calculated on the basis of video analysis as well as their relationship with speed (V50surface breast) clearly show, that stroke rate (SR) kinematic and ample arm propulsion (AP) duration impulse are both highly associated with performance. At the same time V50surface breast is highly related to significant shortening inter-cycle gap - Glide or Overlap. The study shows, that sagittal maximal ventral acceleration (Azmax) and sagittal amplitude acceleration (Azamp) significantly interplay with V50surface breast (0.54, P<0.01 and 0.45, P=0.01 respectively), which is connected with dolphin-like body waving. CONCLUSIONS: The most important thing is to recognize possible gains coming from suitably shaped dolphin-like body waving, as well as to enhance this specific action during well-timed upper trunk and head immersion in each sprint breaststroke cycle.
Authors: Andrzej S Swinarew; Arkadiusz J Stanula; Jadwiga Gabor; Paweł Raif; Jarosław Paluch; Jakub Karpiński; Klaudia Kubik; Hubert Okła; Andrzej Ostrowski; Ewaryst Tkacz; Szymon Skoczyński; Zbigniew Waśkiewicz; Thomas Rosemann; Pantelis T Nikolaidis; Beat Knechtle Journal: Respir Res Date: 2020-04-15