Affiliations: [a] Department of Physiology, Gdansk University of Physical Education and Sport ul. Kazimierza Gorskiego 1, Gdansk, Poland | [b] Department of Theory of Sport and Human Motorics, Gdansk University of Physical Education and Sport ul. Kazimierza Gorskiego 1, Gdansk, Poland
Correspondence:
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Corresponding author: Sylwester Kujach, Department of Physiology, Gdansk University of Physical Education and Sport ul. Kazimierza Gorskiego 1, 80-336 Gdansk, Poland. Tel.: +48 508 120 622; Fax: +48 58 552 29 11; E-mail:[email protected]
Abstract: BACKGROUND AND OBJECTIVE: Typical judo exercise consists of
many acyclic, intermittent activity involving different types of muscle
contractions, which makes monitoring judo trainings' process effectiveness
challenging. The following study applied the near-infrared spectroscopy
(NIRS) as a diagnostic tool in highly-trained judo athletes during an
interval exercise, simulating the intermittent physical activity of a judo
match. It was also designed to examine, whether muscle oxygenation,
cardio-respiratory fitness capacity, and acid-base status differs between
female (FJT) and male (MJT) athletes. METHODS: Judokas completed the same exercise protocol - a triple
Wingate test separated by 4-minute rests. Before, directly after each WAnT
as well as 15 minutes and 1 hour after the third WAnT, blood lactate (LA)
and acid-base balance were determined. During the testing session the
breath-by-breath pulmonary gas exchange method was used. RESULTS: Recorded values of concentration changes in
oxyhemoglobin (O2Hb), deoxyhemoglobin (HHb) and absolute measure of
O2Hb saturation represented as tissue oxygenation index (TOI) revealed
significant differences between groups (p≤ 0.05). Significant
differences among cardio-respiratory factors were only noted between minute
ventilation, and respiratory exchange ratio. Differences in blood lactate,
HCO3 - , and arterial pH were noted after the second and third test as
well as 15 minutes after the protocol's completion. CONCLUSION: Collected data indicate that muscle oxygenation
during the supramaximal exercise differed between genders, likely due to the
influence of blood lactate accumulation on oxygen unloading and reduction in
blood flow. Using NIRS, metabolic differences between groups were
non-invasively determined, with the recorded data confirming the
significance of an aerobic metabolism in judo, even during high-intensity
exercise.
Keywords: Judo, near infrared spectroscopy, high intensity interval exercise
