Do baseline correction in origin pro 8
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(1988, 1991) demonstrated that the mechanism explaining the VO 2sc is likely within the exercising muscle. Over the last decades, numerous studies have aimed to understand the physiological mechanisms underlying a loss of work efficiency or an increase in the O 2 cost per unit of work during constant-load exercise above the gas exchange threshold (GET), i.e., the slow component of O 2 uptake kinetics (VO 2SC). The alterations in VO 2 kinetics which have been suggested to be linked to changes in motor unit recruitment after elevated baseline work rate did not reflect alterations in MFP and fatigue in both sexes. The MFP post-exercise was not significantly influenced by condition in both sexes and cadences (Δtorque for males: at 60 rpm in U-VH = 13 ± 10 Nm, in M-VH = 13 ± 9 Nm at 120 rpm in U-VH = 22 ± 14 Nm, in M-VH = 21 ± 12 Nm for females: at 120 rpm in U-VH = 10 ± 9 Nm, in M-VH = 12 ± 8 Nm p > 0.05), with the exception that female subjects presented smaller decreases in M-UH at 60 rpm compared to U-VH (11 ± 13 vs. Whereas baseline VO 2 and time constant (τ) were significantly higher in M-VH compared to U-VH, the fundamental amplitude and the VO 2 slow component (VO 2sc) were significantly lower in M-VH ( p 0.05). Maximal isokinetic efforts (MIE) were performed before and after each condition at two different cadences (60 or 120 rpm). Subjects performed 4 transitions of very-heavy (VH) intensity cycling in a randomized order after unloaded (U-VH) or moderate (M-VH) exercise.
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This study investigated the effect of elevated baseline work rate on the VO 2 kinetics and MFP in 10 male and 10 female healthy subjects. Although alterations in VO 2 kinetics after elevated baseline work rate have previously been reported, to date no study has observed the effect on muscle force production (MFP) behavior considering physiological differences between male and female subjects. However, a cause-effect relationship remains to be elucidated. 5Human Performance Laboratory, São Paulo State University, Rio Claro, BrazilĪ link between muscle fatigue, decreased efficiency and the slow component of oxygen uptake (VO 2sc) has been suggested.4Exercise Physiology Laboratory, Department of Medicine, Università Degli Studi di Udine, Udine, Italy.3School of Sport and Service Management, University of Brighton, Eastbourne, United Kingdom.2Leonardo da Vinci University/Uniasselvi, Indaial, Brazil.1Physical Effort Laboratory, Sports Center, Federal University of Santa Catarina, Florianopolis, Brazil.Paulo Cesar do Nascimento Salvador 1,2*, Lisa Schäfer 3, Bruno Grassi 4, Luiz Guilherme Antonacci Guglielmo 1 and Benedito Sérgio Denadai 5*