Effect of Cadence on Respiratory Response During Unloaded Cycling in Healthy Individuals

• Autorzy: Agnieszka D. Jastrzębska , Marcin Kowalski
• Języki publikacji: EN

Abstrakty

EN

Purpose. The aim of the study was to establish the respiratory response to unloaded cycling at different cadences. Methods. Eleven healthy participants performed a maximal graded exercise test on a cycle ergometer to assess aerobic fitness (maximal oxygen consumption: 46.27 ± 5.41 ml · min-1 · kg-1) and eight 10-min unloaded pedaling (0 W) bouts at a constant cadence (from 40 to 110 rpm). Respiratory data were measured continuously during each effort and then averaged over 30 s. Blood samples were collected before and 2 min after each effort to monitor changes in acid-base balance. Results. The efforts were performed at an intensity of 16.5-37.5% VO2peak. Respiratory response was not differentiated in cadences of 40, 50, 60 rpm. From 70 rpm, an increase in cadence was significantly associated with increased minute ventilation (F = 168.11, p < 0.000) and oxygen consumption (F = 214.86 p < 0.000) and, from 80 rpm, respiratory frequency (F = 16.06, p < 0.001) and tidal volume (F = 54.67, p < 0.000). No significant changes in acid-base balance were observed as a result of difference cadences. Conclusions. Unloaded cycling at a cadence of 70 rpm or above has a significant effect on respiratory function and may be associated with the involvement of large muscle ergoreceptors (mechanoreceptors) stimulated by the frequency of muscle contractions.

Słowa kluczowe

EN

breathing pattern; cycling; work rate; ergoreceptors

• Czasopismo: Human Movement
• Rocznik: 2015
• Tom: 16
• Numer: 1
• Strony: 36-41

Daty

wydano

2015-03-01

otrzymano

2014-11-04

zaakceptowano

2015-01-13

online

2015-05-23

Twórcy

autor

Agnieszka D. Jastrzębska

• University School of Physical Education, Wrocław, Poland,
• Katedra Fizjologii i Biochemii Akademia Wychowania Fizycznego al. I.J. Paderewskiego 35 51-612 Wrocław, Poland

autor

Marcin Kowalski

• University School of Physical Education, Wrocław, Poland

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Identyfikatory

DOI

10.1515/humo-2015-0025