Anaerobic threshold, a widely used indicator of anaerobic
capacity (AC) [5], has been considered more
sensitive to changes in AC than maximal oxygen uptake
(‡O2max) [3]. Thus, anaerobic threshold, apart from
reflecting the AC level, has been used in setting the
training intensity which, at or slightly above the anaerobic
threshold, is considered an efficient training stimulus
in adults leading to augment their AC [7].
Toubekis et al. [10], who studied young male swimmers
(mean age 12.9 years), reported a significant relationship
between the so-called critical swimming speed
(CSS), determined from swimming times at distances
50, 100, 200 and 400 m, and swimming speed at the lactate
threshold; they suggested that CSS could be determined
from two distances only – 50 and 400 m. The aim
of this study was to assess the effects of 8-week training
in clas-sical and free-style swimming at CSS-intensity
on the performance of 12-year old boys.
Anaerobic threshold, a widely used indicator of anaerobiccapacity (AC) [5], has been considered moresensitive to changes in AC than maximal oxygen uptake(‡O2max) [3]. Thus, anaerobic threshold, apart fromreflecting the AC level, has been used in setting thetraining intensity which, at or slightly above the anaerobicthreshold, is considered an efficient training stimulusin adults leading to augment their AC [7].Toubekis et al. [10], who studied young male swimmers(mean age 12.9 years), reported a significant relationshipbetween the so-called critical swimming speed(CSS), determined from swimming times at distances50, 100, 200 and 400 m, and swimming speed at the lactatethreshold; they suggested that CSS could be determinedfrom two distances only – 50 and 400 m. The aimof this study was to assess the effects of 8-week trainingin clas-sical and free-style swimming at CSS-intensityon the performance of 12-year old boys.
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