Comparison of Cardiovascular Responses Between Upright and Recumbent Cycle Ergometers in Healthy Young Volunteers Performing Low-Intensity Exercise: Assessment of Reliability of the Oxygen Uptake Calculated by Using the ACSM Metabolic Equation

Saitoh, Masakazu; Matsunaga, Atsuhiko; Kamiya, Kentaro; Ogura, Mariko; Sakamoto, Junko; Yonezawa, Ryusuke; Kasahara, Yusuke; Watanabe, Hiroyuki; Masuda, Takashi

doi:10.1016/j.apmr.2004.09.030

Cited by 12 publications

(10 citation statements)

References 14 publications

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“…At matched power output, submaximal ergometry was more efficient in the SS-0° position compared with upright, whereby metabolic state (V̇O 2 , V̇CO 2 , V̇E, RER) and myocardial work (HR, RPP) reduced, while cycling efficiencies (GE and NE) increased. As a comparison with the same external power output (70W), our observations conflict with other work that has observed no difference in HR, RPP and V̇O 2 between upright and recumbent cycling (70°) (Saitoh et al 2005). The authors speculated an insufficient venous return to induce physiological differences between positions, whereas the lower incline angle (~23°) used in this study could hold some accountability for reduced myocardial work and superior efficiency during low-moderate intensity exercise.…”

Section: Discussioncontrasting

confidence: 99%

“…The authors speculated an insufficient venous return to induce physiological differences between positions, whereas the lower incline angle (~23°) used in this study could hold some accountability for reduced myocardial work and superior efficiency during low-moderate intensity exercise. Moreover, the back support during ergometery in SS-0° could have contributed to enhanced cycling efficiency with localisation of muscular work to the lower extremities, in contrast to the additions of upper extremity and trunk activation with upright cycling (Saitoh et al 2005).…”

Section: Discussionmentioning

confidence: 99%

“…Laboratory investigations have employed exercise protocols including upright (Unnithan et al 2015) and (semi)supine positions, with the latter conducted using differing left-lateral tilt angles (Stöhr et al 2012;Beaumont et al 2017). The cardiometabolic responses during submaximal exercise between upright and SS/recumbent body positions have been studied (Saitoh et al 2005;Egaña et al 2013), yet the influences of left-lateral tilting are unknown.…”

Section: Introductionmentioning

confidence: 99%

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Cardiovascular responses during submaximal cycling with and without left-lateral tilting: insights for practical applications of stress echocardiography

Beaumont

Forrest

Unnithan

et al. 2021

Appl. Physiol. Nutr. Metab.

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We investigated the cardiorespiratory responses to semi-supine exercise with (SS-45°) and without (SS-0°) a left-lateral tilt in fifteen adults, at fixed power output (70W) and matched heart rates. At 70W, oxygen uptake and heart rate reduced from upright to SS-0° then increased to SS-45° (p<0.05). At matched heart rates, oxygen uptake and efficiency were lowest in SS-45° (p<0.05). Left-lateral tilting should not be performed under the assumption that each position replicates the same cardiorespiratory responses. Novelty • Cardiorespiratory responses to exercise are influenced by left-lateral tilting, which should not be performed under the assumption that physiological responses are replicated between left-lateral positions.

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Section: Discussioncontrasting

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Cardiovascular responses during submaximal cycling with and without left-lateral tilting: insights for practical applications of stress echocardiography

Beaumont

Forrest

Unnithan

et al. 2021

Appl. Physiol. Nutr. Metab.

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“…While upright cycling is most typically prescribed for these patients, we recently reported that recumbent cycle ergometry in healthy young men acutely increased prefrontal cortex oxygenation by a greater magnitude (Faulkner, Lambrick, Kaufmann, & Stoner, ). This may be because recumbent exercise enhances cardiac output (Quinn, Smith, Vroman, Kertzer, & Olney, ; Saitoh et al, ; Walsh‐Riddle & Blumenthal, ), and cardiac output has been shown to have a linear relationship with cerebral blood flow (Ogoh & Ainslie, ). Contrary to the hypothesis, executive function was found to improve by a similar amount for both upright and recumbent exercise; however, there may be a ceiling effect in healthy young men who would not be expected to have impaired executive function.…”

Section: Introductionmentioning

confidence: 99%

Acute effects of exercise posture on executive function in transient ischemic attack patients

et al. 2017

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DisclaimerThe University of Gloucestershire has obtained warranties from all depositors as to their title in the material deposited and as to their right to deposit such material.The University of Gloucestershire makes no representation or warranties of commercial utility, title, or fitness for a particular purpose or any other warranty, express or implied in respect of any material deposited.The University of Gloucestershire makes no representation that the use of the materials will not infringe any patent, copyright, trademark or other property or proprietary rights.The University of Gloucestershire accepts no liability for any infringement of intellectual property rights in any material deposited but will remove such material from public view pending investigation in the event of an allegation of any such infringement. PLEASE SCROLL DOWN FOR TEXT. 1 ACUTE EFFECTS OF EXERCISE POSTURE ON EXECUTIVE FUNCTION IN TRANSIENT ISCHEMIC ATTACK PATIENTS AbstractIn patients with stroke or transient ischaemic attacks (TIA), a decline in executive function may limit an individual's ability to process motor tasks and re-learn motor skills. The purpose of this study was to assess the acute effect of exercise posture (seated vs. supine cycle ergometry) on executive function and prefrontal cortex perfusion, in patients with TIA. Eleven TIA patients (65±10y) and 15 age-matched, healthy-controls (HC; 62±7y) completed two graded exercise tests to maximal functional capacity (1 x seated; 1 x supine) and two 30-minute sub-maximal exercise tests (1 x seated, 1 x supine). Executive function was assessed prior-to and following (1.5-min Post, 15-min Post) the submaximal exercise tests using a Stroop Task.Prefrontal cortex perfusion (total hemoglobin) was continuously recorded using near infrared spectroscopy. Group had no significant influence on prefrontal cortex perfusion (P > .05). In conclusion, executive function improves to a similar extent in TIA and age-matched, healthy-controls following an acute bout of exercise, regardless of exercise posture (seated vs. supine). As acute improvements in executive function were maintained for 15 minutes, there could be an important window of opportunity for assigning executive tasks following exercise rehabilitation for patients with TIA.

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“…Apart from the arm ergometer, there are no data regarding the ventilatory efficiency in alternative exercise devices for a comparison of results. Most studies on alternative devices focused more on the peak cardiopulmonary values [ 53 , 54 ] or submaximal values of V′O 2 or heart rate [ 55 – 57 ]. Since ventilatory efficiency data could provide additional information regarding the severity and prognosis of some heart or lung diseases [ 20 – 23 ], more study of these parameters on the alternative exercise testing devices should be done.…”

Section: Discussionmentioning

confidence: 99%

Submaximal cardiopulmonary thresholds on a robotics-assisted tilt table, a cycle and a treadmill: a comparative analysis

et al. 2015

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BackgroundThe robotics-assisted tilt table (RATT), including actuators for tilting and cyclical leg movement, is used for rehabilitation of severely disabled neurological patients. Following further engineering development of the system, i.e. the addition of force sensors and visual bio-feedback, patients can actively participate in exercise testing and training on the device. Peak cardiopulmonary performance parameters were previously investigated, but it also important to compare submaximal parameters with standard devices. The aim of this study was to evaluate the feasibility of the RATT for estimation of submaximal exercise thresholds by comparison with a cycle ergometer and a treadmill.Methods17 healthy subjects randomly performed six maximal individualized incremental exercise tests, with two tests on each of the three exercise modalities. The ventilatory anaerobic threshold (VAT) and respiratory compensation point (RCP) were determined from breath-by-breath data.ResultsVAT and RCP on the RATT were lower than the cycle ergometer and the treadmill: oxygen uptake (V′O2) at VAT was [mean (SD)] 1.2 (0.3), 1.5 (0.4) and 1.6 (0.5) L/min, respectively (p < 0.001); V′O2 at RCP was 1.7 (0.4), 2.3 (0.8) and 2.6 (0.9) L/min, respectively (p = 0.001). High correlations for VAT and RCP were found between the RATT vs the cycle ergometer and RATT vs the treadmill (R on the range 0.69–0.80). VAT and RCP demonstrated excellent test–retest reliability for all three devices (ICC from 0.81 to 0.98). Mean differences between the test and retest values on each device were close to zero. The ventilatory equivalent for O2 at VAT for the RATT and cycle ergometer were similar and both were higher than the treadmill. The ventilatory equivalent for CO2 at RCP was similar for all devices. Ventilatory equivalent parameters demonstrated fair-to-excellent reliability and repeatability.ConclusionsIt is feasible to use the RATT for estimation of submaximal exercise thresholds: VAT and RCP on the RATT were lower than the cycle ergometer and the treadmill, but there were high correlations between the RATT vs the cycle ergometer and vs the treadmill. Repeatability and test–retest reliability of all submaximal threshold parameters from the RATT were comparable to those of standard devices.

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Comparison of Cardiovascular Responses Between Upright and Recumbent Cycle Ergometers in Healthy Young Volunteers Performing Low-Intensity Exercise: Assessment of Reliability of the Oxygen Uptake Calculated by Using the ACSM Metabolic Equation

Cited by 12 publications

References 14 publications

Cardiovascular responses during submaximal cycling with and without left-lateral tilting: insights for practical applications of stress echocardiography

Cardiovascular responses during submaximal cycling with and without left-lateral tilting: insights for practical applications of stress echocardiography

Acute effects of exercise posture on executive function in transient ischemic attack patients

Submaximal cardiopulmonary thresholds on a robotics-assisted tilt table, a cycle and a treadmill: a comparative analysis

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