Abstract
The aim of the study was to evaluate and compare the maximal oxygen uptake (dot{mathrm{V}}O2max) achieved during incremental and decremental protocols in highly trained athletes. Nineteen moderate trained runners and rowers completed, on separate days, (i) an initial incremental dot{mathrm{V}}O2max test (INC) on a treadmill, followed by a verification phase (VER); (ii) a familiarization of a decremental test (DEC); (iii) a tailored DEC; (iv) a test with decremental and incremental phases (DEC-INC); (v) and a repeated incremental test (INCF). During each test dot{mathrm{V}}O2, carbon dioxide production, ventilation, heart and breath rates and ratings of perceived exertion were measured. No differences were observed in dot{mathrm{V}}O2max between INC (61.3 ± 5.2 ml kg−1 min−1) and DEC (61.1 ± 5.1 ml kg−1 min−1; average difference of ~ 11.58 ml min−1; p = 0.831), between INC and DEC-INC (60.9 ± 5.3 ml kg−1 min−1; average difference of ~ 4.8 ml min−1; p = 0.942) or between INC and INCF (60.7 ± 4.4 ml kg−1 min−1; p = 0.394). dot{mathrm{V}}O2max during VER (59.8 ± 5.1 ml kg−1 min−1) was 1.50 ± 2.20 ml kg−1 min−1 lower (~ 2.45%; p = 0.008) compared with values measured during INC. The typical error in the test-to-test changes for evaluating dot{mathrm{V}}O2max over the five tests was 2.4 ml kg−1 min−1 (95% CI 1.4–3.4 ml kg−1 min−1). Decremental tests do not elicit higher dot{mathrm{V}}O2max than incremental tests in trained runners and rowers, suggesting that a plateau in dot{mathrm{V}}O2 during the classic incremental and verification tests represents the maximum ceiling of aerobic power.
Highlights
Archibald Hill and his c olleagues[1]
Et al.[29] supported the decremental test design with: (i) an incremental test may cause more anticipatory stress, which may lead to a difference in blood flow response; (ii) a decremental test, with workload progressively easier, might relax brain controls directing the termination of exercise[28,30]; (iii) evidence suggests that submaximal decremental protocols produce higher-than-expected incremental protocol[31,32]
No differences in V O2max were observed with post hoc analysis between incremental test (INC) and verification phase test (VER) (59.8 ± 5.1 ml kg−1 min−1; average difference of 1.50 ± 2.20 ml kg−1 min−1, ~ 2.45%; p = 0.127), INC and decremental test (DEC)
Summary
Archibald Hill and his c olleagues[1]. They observed a linear relationship between workload and oxygen uptake until the V O2max was reached and proposed that the tion the oxygen, called physiological ceiling for body has a limited capacity to uptake, cardiorespiratory fitness[1]. At the beginning of this century, Noakes and M arino[28] introduced another theory into this discussion, which states that the cardiovascular system never reaches a limit of work and that V O2max is regulated, rather than limited, by the number of motor units recruited in the exercising limbs, which is always submaximal This model proposes that the central nervous system (a central governor) controls the circulation during severe exercise and that there is always both cardiovascular and neuromuscular reserve upon exhaustion during incremental e xercise[23]; the brain stops the exercise to prevent catastrophic failure in the body s ystem[28].
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
