IMR Press / JOMH / Volume 18 / Issue 9 / DOI: 10.31083/j.jomh1809186
Open Access Original Research
The Effects of 12 Weeks In-Water Training in Stroke Kinematics, Dry-Land Power, and Swimming Sprints Performance in Master Swimmers
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1 Polytechnic Institute of Setúbal, (CIEF, ESE/IPS; CDP2T, ESTSetúbal/IPS), 2914-504 Setúbal, Portugal
2 Life Quality Research Centre (CIEQV-Leiria), Complexo Andaluz, Apartado, 2040-413 Rio Maior, Portugal
3 Faculdade de Motricidade Humana, Universidade de Lisboa, 1499-002 Cruz Quebrada, Portugal
4 Department of Sport Sciences, Sport Sciences School of Rio Maior, 2040-413 Rio Maior, Portugal
5 Research Centre in Sports, Health and Human Development (CIDESD), 5000-801 Vila Real, Portugal
6 Training Optimization and Sports Performance Research Group (GOERD), Sport Science Faculty of Cáceres, University of Extremadura, S/N, 10003 Cáceres, Spain
7 Graduate Programme in Human Development and Technology, São Paulo State University (UNESP), 13506-900 Rio Claro, Brazil
8 Department of Physical Education, São Paulo State University (UNESP), 17033-360 Bauru, Brazil
*Correspondence: mario.espada@ese.ips.pt (Mário Espada)
J. Mens. Health 2022, 18(9), 186; https://doi.org/10.31083/j.jomh1809186
Submitted: 1 April 2022 | Revised: 24 May 2022 | Accepted: 10 June 2022 | Published: 6 September 2022
(This article belongs to the Special Issue Sports Biomechanics for Health and Performance)
Copyright: © 2022 The Author(s). Published by IMR Press.
This is an open access article under the CC BY 4.0 license.
Abstract

Background: Master swimming is becoming increasingly popular, but research related to the training process and its effect on this population is scarce. The aim of this study was to investigate the effects of 12 weeks in-water training in stroke kinematics, dry-land power, and swimming sprints performance in master swimmers, and the relationships between these variables in this sports population. Methods: 15 healthy and physically active male master swimmers (age 32.3 ± 5.1 years, height 1.81 ± 0.04 m, body mass 77.0 ± 6.5 kg, training experience of 11 ± 4 years and average swimming training volume ~2.5 km/day, 3 times a week) participated in the study. Previously and after the intervention program, entirely water-based, swimmers were tested in a dry-land environment to assess their upper and lower body limbs (UL and LL) strength through power measurements, namely countermovement jumps (CMJ), seated 3 kg medicine ball throwing (MBT) and maximal isometric strength with handgrip (HG). In-water 50 m maximal front crawl swimming test was also completed. Swimming performance at 15, 25, and 50 m (T15, T25, and T50) was determined, and the associated stroke kinematics. During the intervention program period, swimming training comprised three sessions per week (7.5 ± 0.9 km per microcycle), with low- to high-intensity aerobic and anaerobic swimming series and technical drills. Results: T25 significantly decreased after 12 weeks of training (18.82 ± 2.92 vs. 18.60 ± 2.87 sec, p = 0.02), the same was observed in the case of T50 (40.36 ± 7.54 vs. 38.32 ± 6.41 sec, p = 0.00). Changes in stroke rate (SR), stroke length (SL) and stroke index (SI) in swimming performance at 15 m were not observed, contrarily to 25 and 50 m, where SL and SI significantly increased. MBT and HG improved, but not CMJ, and improvements in T15, T25 and T50 were mostly related to kinematic proficiency improvement. Conclusions: 12 weeks of in-water training in master swimmers significantly enhance performance time in 25 and 50 m front crawl swimming. SL and SI are also improved and are the variables that most influence T15, T25 and T50 when compared to SR and dry-land power variables. Centering the training process not only in in-water tasks in master swimmers seem to be of relevant interest since age influences stroke kinematic and power variables.

Keywords
aging
aquatic sport
biomechanics
strength
speed
Figures
Fig. 1.
Funding
UID04045/2020/ Portuguese Foundation for Science and Technology
UIDB/04748/2020/ Portuguese Foundation for Science and Technology
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