Effect of pedal cadence on mechanical power output and physiological variables

Marcelo Ricardo Cabral Dias, André Calil e Silva, José Marques Novo Júnior, Luiz Alberto Batista, Jorge Roberto Perrout de Lima, Jefferson da Silva Novaes

Abstract


The objective of this study was to compare the responses of the variables maximal power output (POmax), heart rate (HR), rating of perceived exertion (RPE), systolic blood pressure (SBP), diastolic blood pressure (DBP) and
double product (DP) in the maximum reached load and during 60 and 90 rev.min-1 tests. The study sample consisted of 14 men (26.5 ± 3.5 years, 78.5 ± 7.8 kg and 178.1 ± 7.0 cm) engaged in indoor cycling classes, who undertook two tests of maximum effort using Balke’s incremental protocol. The fi rst test (test60) consisted of a pedal cadence of 60 rev.min-1 throughout the test, until voluntary exhaustion or the appearance of signs or symptom limits. The second test (test90) was at a pedal cadence of 90 rev.min-1. There were no signifi cant difference between the cadences tested in terms of HRmax (test60: 189.7±12.0 beats.min-1; test90: 190.9±10.7 beats.min-1), RPEmax (test60: 20.0±0.3; test90: 20.0±1.0) or DBPmean (test60: 76.7±4.9 mmHg; test90: 79.1 ± 5.3 mmHg). On the other hand, the values of POmax (test60: 344.6±70.1 W; test90: 285.7±61.8 W), SBPmax (test60: 186.1±14.7 mmHg; test90: 202.1±21.5 mmHg) and DPmax (test60: 35402.9±4431.7; test90: 38655.0±5270.5) were different. In relation to the behavior of the variables during the tests, there were signifi cant difference in HR between the tests up to a level of 225 W. It was observed that neither RPE or DBP indicated signifi cant difference in absolute power. There were only differences in SBP and DP between the cadences at 300 W absolute power. With this, it is clear that to carry out maximum tests, even in protocols that do not prescribe the pedal cadence, it appears thet a 60 rev.min-1 pedalling speed is indicated.

Keywords


Ciclismo; Economia; Efi ciência; Potência. <p> Bycycling; Economics; Efi ciency; Potency.



DOI: https://doi.org/10.5007/%25x

The abbreviated title of the journal is Rev. Bras. Cineantropom. Desempenho Hum, which should be used in bibliographies, footnotes and bibliographical references. E-ISSN 1980-0037, impressa ISSN 1415-8426, Florianópolis, Santa Catarina, Brazil. This work is licensed under a Creative Commons Attribution 4.0 International License.