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  • Long lasting exercise involvement protects against VO2 max. and VO2 kinetics decline in moderately active women [Elektronski vir]
    Zubac, Damir ...
    We studied the effects of age on different physiological parameters, including those derived from the i) maximal cardiopulmonary exercise testing (CPET), ii) moderate-intensity step-transitions and ... iii) tensiomyography (TMG)-derived variables in moderately active women. Twenty-eight women (age range from 19 to 53 y), completed three laboratory visits, including baseline data collection, TMG assessment, V%O2 max. test via CPET, and a step-transition test from 20 W to a moderate-intensity cycling power output (PO), corresponding to V%O2 at 90% gas exchange threshold. During the step-transitions breath-by-breath pulmonary oxygen uptake (V%O2p), near infrared spectroscopy derived muscle deoxygenation (%HHb), and beat-by-beat cardiovascular response were continuously monitored. There were no differences observed between the young and middle-aged women in their V%O2 max. and peak PO, while the HR max. was 12 bpm lower in middle-aged compared to young (p=.016). Also, no differences were observed between the age groups in %V%O2p, %HHb, and %HR during on-transients. The first regression model showed that age did not attenuate the maximal CPET capacity in the studied population (p=.638), while in the second model a faster %V%O2p, combined with shorter TMG-derived contraction time (Tc) of the vastus lateralis (VL), were associated with a higher V%O2 max. (~30% of explained variance, p=.039). In conclusion, long lasting exercise involvement protects against a V%O2 max. and %V%O2p deterioration in moderately active women. Novelty bullets: % Faster pulmonary %V%O2p and shorter Tc of the VL explain 33% of the variance in superior V%O2 max. attainment; No differences between age groups were found in %V%O2p, %%HHb, %HR, during on-transients
    Vir: Applied physiology, nutrition, and metabolism [Elektronski vir]. - ISSN 1715-5320 (Vol. 46, iss. 2, 2020, str. 108-116)
    Vrsta gradiva - e-članek ; neleposlovje za odrasle
    Leto - 2020
    Jezik - angleški
    COBISS.SI-ID - 26481155

    Povezava(-e):

    https://www.nrcresearchpress.com/doi/pdfplus/10.1139/apnm-2020-0307

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