The validity of Keiser-M3 stationary bicycle with standard ergometer for physiological measurements associated with maximum effort

Abstract

This study aims to investigate the concordance between two cycle ergometers for variables measured in the test of maximum incremental effort. Methods: This correlation study enrolled 15 inactive women (19,2 ± 4,0 years old). At random, the participants performed two maximal effort incremental tests (MEIT), using cycle ergometers (Keiser-M3 and Ergo-167) on different days with a minimum interval of 72 hours. The test had stages of two minutes, and two-step increments were carried out at the end of each stage. Lactate concentration ([LAC]), and rated perceived exertion (RPE) were collected, in addition to monitoring oxygen uptake (VO 2 ) and heart rate (HR). The Paired t-test was carried out to compare physiologic variables, Lin's test was used for correlation, and Bland Altman was used to measuring concordances among variables. Results: The correlations between physiologic parameters were considered strong for HR on the anaerobic threshold (Keiser M3 = 146 ± 14 bpm; Ergo-167 = 149 ± 9 bpm; r = 0.762), greater blood lactate value (Keiser M3 = 9,97 ± 2,51 mmol/L; Ergo-167 = 9.71 ± 2.56 mmol/L; r = 0.820), VO 2max (Keiser M3 = 38,37 ± 6,97 mL/kg/min; Ergo-167 = 36.06 ± 8.4 mL/kg/min; r = 0,806) and HR max (Keiser M3 = 186 ± 53 bpm; Ergo-167 = 188 ± 11 bpm; r = 0.716). Conclusion: The results show the feasibility of using the cycle ergometer Keiser, model M3, to perform the maximal effort incremental test, whereas there was high concordance in the physiologic responses in both ergometers for inactive women.

Assessment of Cardio-Respiratory Relationship during and after Exercise in Healthy Recreative Male Subjects: A Pilot Study

“…The participants were instructed to restrict their intake of food and drinks that included caffeine and alcohol and to avoid physical exercise 24 h before the experiment. The experiment was carried out on three consecutive days between 8 a.m. and 3 p.m., and the measurements were performed in environmentally controlled conditions: (21)(22)(23) • C [18][19][20].…”

“…After finishing the first phase, the participants were included in the physical exercise phase with submaximal effort. For this phase, a Keiser-M3 (Keiser™, Chicago, IL, USA) spinning bike ergometer was used, which represents an alternative to standard cycle ergometers [21]. In this study, physical exercise is defined according to the modified Young Men's Christian Association (YMCA) test protocol for submaximal effort, which was modified by adding two additional phases of 3 min in duration with an equivalent increase in resistance (Figure 1, Table 2) [22].…”

“…USA) spinning bike ergometer was used, which represents an alternative to standa ergometers [21]. In this study, physical exercise is defined according to the m Young Men s Christian Association (YMCA) test protocol for submaximal effort was modified by adding two additional phases of 3 min in duration with an equ increase in resistance (Figure 1, Table 2) [22].…”

Acute respiratory flow restriction affects average power, but not heart rate and subjective perceived exertion in healthy women

“…In order to be evaluated, the participants should present themselves adequately fed, having had their last meal between 60 min and 90 min before physical effort, and slept between 8 h and 10 h the night before, in addition to having not practiced high-intensity effort over the previous 24 h. Laboratory conditions were maintained constant, at 21 °C and 60% relative humidity (Veiga et al, 2020).…”