Efeito da cadência de pedalada sobre as respostas metabólica e cardiovascular durante o exercício incremental e de carga constante em indivíduos ativos

Denadai, Benedito Sérgio; Ruas, Vinícius Daniel de Araújo; Figueira, Tiago Rezende

doi:10.1590/s1517-86922005000500008

Cited by 17 publications

(10 citation statements)

References 19 publications

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“…The ergospirometric test with graded loads until the individual's capacity threshold, performed to measure the maximum oxygen uptake ( O 2max ) (1) , anaerobic threshold (AT) (1)(2)(3) , maximum power output (W max ) and mechanical efficiency (4) is a common practice in laboratories of exercise physiology (2,5) . The analysis of these variables becomes more important during the performance of physical exercises of long duration, since the mechanical efficiency is one of the main parameters observed in endurance events (6) .…”

Section: Introductionmentioning

confidence: 99%

“…The mechanical efficiency reflects the amount of potential chemical energy stored in the muscle converted into mechanical work. This efficiency is usually estimated from the oxygen consumption (4,7) . In the evaluation of this parameter, the cycle ergometer is preferable, since it presents readings of the physical power closer to the real value (1,4) .…”

Section: Introductionmentioning

confidence: 99%

“…This efficiency is usually estimated from the oxygen consumption (4,7) . In the evaluation of this parameter, the cycle ergometer is preferable, since it presents readings of the physical power closer to the real value (1,4) . The maintenance of the physical exercise depends on a suitable supply of oxygen to the active muscles (6) .…”

Section: Introductionmentioning

confidence: 99%

“…The maintenance of the physical exercise depends on a suitable supply of oxygen to the active muscles (6) . The availability of oxygen to the muscle tissue during exercise can be measured through the delta mechanical efficiency (EMr), which corresponds to the quotient between the variation of the energy cost and the variation of the power generated (4,7,8) . In the high intensity exercises the EMr may interfere in the capacity to move high loads of work with predominance of oxidative metabolism, observing extra oxygen consumption (7,8) .…”

Section: Introductionmentioning

confidence: 99%

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Resposta da cinética de consumo de oxigênio e da eficiência mecânica delta de homens e mulheres em diferentes intensidades de esforço

Cerqueira¹,

Nogueira²,

Carvalho³

et al. 2011

Rev Bras Med Esporte

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Introduction and objective: Delta efficiency (DE) and oxygen uptake kinetics (K O 2 ) are influenced by muscle metabolic parameters and oxygen transport. The aim of this study was to determine the difference in DE and K O 2 in three effort intensities in both genders. Methods: Fifty-six subjects (26 women) were submitted to a graded maximal exercise test (GXT) on cycle ergometer to determine the maximum oxygen uptake ( O 2max ), maximal power output (W max ), anaerobic threshold (AT) and respiratory compensation point (RCP). The AT and RCP were determined using the V-slope and E / O 2 methods; the RCP using the relationship O 2 versus E both by two investigators. The DE and K O 2 have been considered as a slope between O 2 versus Watts and O 2 versus time (s), respectively, from the beginning of test until AT (S 1 ), from AT to RCP (S 2 ) and from RCP to O 2max (S 3 ), determined by linear regression analysis. Results: Regarding DE, significant differences were observed between S 1 versus S 2 (p = 0.001), S 1 versus S 3 (p = 0.001) and S 2 versus S 3 (p = 0.006). There was no significant difference (p = 0.060) or interaction (p = 0.062) between men and women. For K O 2 , significant differences were observed between S 1 versus S 3 (p = 0.001) and S 2 versus S 3 (p = 0.001) in both genders. Significant differences (p = 0.001) and interaction (p = 0.006) were observed between men and women, in the last parameter. Conclusions: DE decreases with increasing intensity of power output, but there are no differences when comparing men and women. On the other hand, women present faster K O 2 than men.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Resposta da cinética de consumo de oxigênio e da eficiência mecânica delta de homens e mulheres em diferentes intensidades de esforço

Cerqueira¹,

Nogueira²,

Carvalho³

et al. 2011

Rev Bras Med Esporte

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“…Existem diversas opções de atividades aeróbicas oferecidas em academias de ginástica e a metodologia comumente utilizada nestas atividades tem servido como campo de investigação para muitos estudiosos (ANJOS et al, 2006;DENADAI;RUAS;FIGUEIRA, 2005;FURTADO;SIMÃO;LEMOS, 2004;GROSSL et al, 2008;OLSON et al, 1991;. Dentre as opções é possível citar as atividades em esteiras elétricas e mecânicas, bicicletas ergométricas, ginástica aeróbica, "cicle indoor", "step training" e "jump training" (NOVAES;VIANNA, 2003;VIANNA et al, 2002).…”

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Consumo de oxigênio, frequência cardíaca e dispêndio energético em coreografias de jump

Perantoni

Lauria²,

Deresz³

et al. 2010

R. Educ. Fís. UEM

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RESUMOO estudo se propôs a comparar o efeito agudo da elevação da cadência musical e da utilização dos membros superiores em uma coreografia de "Jump" nas variáveis frequência cardíaca (FC), consumo de oxigênio (VO 2 ), dispêndio energético (DE) e percepção subjetiva do esforço (PSE). Onze mulheres voluntárias saudáveis (idades 23,2 ± 2,2 anos, massa corporal 61,7 ± 8,3 kg, estatura 165,3 ± 6,1cm) praticantes da modalidade "Jump Training" foram avaliadas e submetidas a quatro testes, o primeiro dos quais consistiu na identificação do VO 2max e nos três posteriores foram realizados os protocolos de "Jump" do estudo. Os valores médios encontrados nos protocolos "Jump" 1, "Jump" 2 e "Jump" 3 foram: FC (155 ± 14 bpm; 160 ± 15 bpm; 165 ± 14 bpm); VO 2 (25,16 ± 4,3 mL/kg/min; 28,17 ± 4,9 mL/kg/min; 28,83 ± 6,1 mL/kg/min); DE (7,75 ± 1,6 kcal/min; 8,67 ± 1,8 kcal/min; 8,87 ± 2,1 kcal/min); PSE (13 ± 2,5; 14 ± 2,3; 14 ± 2,9). Não houve diferença significativa. Pode-se concluir que as variações de protocolos utilizadas não são suficientes para aumentar a intensidade de uma aula de "Jump".Palavras-chave: Atividade física. Variáveis cardiorrespiratórias.

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The effect of pedalling cadence on maximal accumulated oxygen deficit

Hill

Vingren

2011

Eur J Appl Physiol

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Pedalling cadence influences the oxygen demand and the tolerable duration of severe intensity cycle ergometer exercise. Both of these variables are factors in the calculation of maximal accumulated oxygen deficit (MAOD), which is a widely accepted measure of anaerobic capacity. We were therefore interested in determining whether pedalling cadence affected the value of MAOD. Eighteen university students performed square wave cycling tests, using cadences of 60, 80, and 100 rev min(-1), at work rates selected to cause exhaustion in ~5 min. The oxygen demands for the tests were estimated by extrapolation from the steady-state oxygen uptake in two 4-min moderate intensity bouts performed using each cadence, and were greater at higher cadences. Times to exhaustion were shorter at higher cadences (368 ± 168 s at 60 rev min(-1) > 299 ± 118 s at 80 rev min(-1) > 220 ± 85 s at 100 rev min(-1)). These factors conflated to produce values for MAOD that were not affected by cadence (52 ± 5 ml kg(-1) = 52 ± 5 ml kg(-1) = 52 ± 5 ml kg(-1)). Similarly, the blood lactate concentrations measured 5 min post-exercise were not affected by the pedalling cadence (10.5 ± 2.1 mM = 10.8 ± 1.0 mM = 10.7 ± 2.0 mM). Although muscle contraction frequency influences many exercise responses, we conclude that the expression of anaerobic capacity is not affected by the choice of pedalling cadence.

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Efeito da cadência de pedalada sobre as respostas metabólica e cardiovascular durante o exercício incremental e de carga constante em indivíduos ativos

Cited by 17 publications

References 19 publications

Resposta da cinética de consumo de oxigênio e da eficiência mecânica delta de homens e mulheres em diferentes intensidades de esforço

Resposta da cinética de consumo de oxigênio e da eficiência mecânica delta de homens e mulheres em diferentes intensidades de esforço

Consumo de oxigênio, frequência cardíaca e dispêndio energético em coreografias de jump

The effect of pedalling cadence on maximal accumulated oxygen deficit

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