Manipulation of Stroke Rate in Swimming: Effects on Oxygen Uptake Kinetics
Int J Sports Med DOI: 10.1055/a-1930-5462The study aimed to assess the effect of different front crawl stroke rates (SRs)
in the oxygen uptake (̇VO2) kinetics and ̇VO2 peak, the total time to
exhaustion (TTE), and blood lactate concentration ([La]) at 95% of the
400-m front crawl test (T400) mean speed (S400). Twelve endurance swimmers
performed a T400 and four trials at 95% of the S400: (i) free SR, (ii)
fixed SR (100% of the average free SR trial), (iii) reduced SR
(90% of the average free SR trial), and (iv) increased SR (110%
of the average free SR trial). ̇VO2 was accessed continuously
with breath-by-breath analysis. The results highlighted: (i) the time constant
at increased SR (13.3±4.2 s) was lower than in the reduced SR
condition (19.5±2.6 s); (ii) the amplitude of the primary phase
of ̇VO2 kinetics in the fixed SR
(44.0±5.8 ml·kg-1·min-1)
was higher than in the increased SR condition
(39.5±6.4 ml·kg-1·min-1);
and (iii) TTE was lower in the fixed SR (396.1±189.7 s) than the
increased SR condition (743.0±340.0 s). The results indicate
that controlled SR could be considered a swimming training strategy, focusing on
physiological parameters overload. [...] Georg Thieme Verlag KG Rüdigerstraße 14, 70469 Stuttgart, GermanyArticle in Thieme eJournals: Table of cont...
Source: International Journal of Sports Medicine - Category: Sports Medicine Authors: Franken, Marcos Figueiredo, Pedro De Assis Correia, Ricardo Feitosa, Wellington Gomes Lazzari, Caetano Decian Diefenthaeler, Fernando Castro, Fl ávio Souza Tags: Training & Testing Source Type: research