Influence of Different Treadmill Inclinations on V̇o 2max and Ventilatory Thresholds During Maximal Ramp Protocols

Silva, Sidney Cavalcante da; Monteiro, Walace David; Cunha, Felipe; Farinatti, Paulo

doi:10.1519/jsc.0000000000002670

Cited by 4 publications

(3 citation statements)

References 24 publications

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“…During studies selection, we did not define the criteria for the VO2max measurement protocol due to the high variability of the currently described methods. Nevertheless, according to the current literature, different testing protocols were applied for runners and cyclists [ 48 – 51 ]. Similar values of VO 2max were observed, which suggests that it is possible to provide an exact comparison between them.…”

Section: Methodsmentioning

confidence: 99%

External validation of VO2max prediction models based on recreational and elite endurance athletes

et al. 2023

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In recent years, numerous prognostic models have been developed to predict VO2max. Nevertheless, their accuracy in endurance athletes (EA) stays mostly unvalidated. This study aimed to compare predicted VO2max (pVO2max) with directly measured VO2max by assessing the transferability of the currently available prediction models based on their R2, calibration-in-the-large, and calibration slope. 5,260 healthy adult EA underwent a maximal exertion cardiopulmonary exercise test (CPET) (84.76% male; age 34.6±9.5 yrs.; VO2max 52.97±7.39 mL·min-1·kg-1, BMI 23.59±2.73 kg·m-2). 13 models have been selected to establish pVO2max. Participants were classified into four endurance subgroups (high-, recreational-, low- trained, and “transition”) and four age subgroups (18–30, 31–45, 46–60, and ≥61 yrs.). Validation was performed according to TRIPOD guidelines. pVO2max was low-to-moderately associated with direct CPET measurements (p>0.05). Models with the highest accuracy were for males on a cycle ergometer (CE) (Kokkinos R2 = 0.64), females on CE (Kokkinos R2 = 0.65), males on a treadmill (TE) (Wasserman R2 = 0.26), females on TE (Wasserman R2 = 0.30). However, selected models underestimated pVO2max for younger and higher trained EA and overestimated for older and lower trained EA. All equations demonstrated merely moderate accuracy and should only be used as a supplemental method for physicians to estimate CRF in EA. It is necessary to derive new models on EA populations to include routinely in clinical practice and sports diagnostic.

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Section: Methodsmentioning

confidence: 99%

External validation of VO2max prediction models based on recreational and elite endurance athletes

et al. 2023

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“…During studies selection, we did not define the criteria for the VO2max measurement protocol due to the high variability of the currently described methods. Nevertheless, according to the current literature, different testing protocols were applied for runners and cyclists [48][49][50][51]. Similar values of VO 2max were observed, which suggests that it is possible to provide an exact comparison between them.…”

Section: Plos Onementioning

confidence: 84%

External validation of VO2max prediction models based on recreational and elite endurance athletes

Wiecha

Kasiak

Cieśliński

et al. 2022

Preprint

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In recent years, numerous prognostic models have been developed to predict VO2max. Nevertheless, their accuracy in endurance athletes (EA) stays mostly unvalidated. This study aimed to compare predicted VO2max (pVO2max) with directly measured VO2max.5,260 healthy adult EA underwent a maximal exertion cardiopulmonary exercise test (CPET) (84.76% male; age 34.6±9.5 yrs.; VO2max 52.97±7.39 mL·min-1·kg-1, BMI 23.59±2.73 kg·m-2). 13 models have been selected to establish pVO2max. Participants were classified into four endurance subgroups (high-, recreational-, low- trained, and “transition”) and four age subgroups (18-30, 31-45, 46-60, and ≥61 yrs.). Validation was performed according to TRIPOD guidelines. pVO2max was low-to-moderately associated with direct CPET measurements (p>0.05). Models with the highest accuracy were for males on a cycle ergometer (CE) (Kokkinos R2=0.64), females on CE (Kokkinos R2=0.65), males on a treadmill (TE) (Wasserman R2 =0.26), females on TE (Wasserman R2=0.30). However, selected models underestimated pVO2max for younger and higher trained EA and overestimated for older and lower trained EA. All equations demonstrated merely moderate accuracy and should only be used as a supplemental method for physicians to estimate CRF in EA. It is necessary to derive new models on EA populations to include routinely in clinical practice and sports diagnostic.

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“…A cardiopulmonary exercise testing (CPET) was performed by patients to obtain information on their exercise tolerance before intervention. According to the exercise testing guidelines recommended by the American College of Cardiology (ACC) and the American College of Sports Medicine (ACSM), the cardiopulmonary exercise test in this study utilized a graded ascending exercise protocol (Ramp protocol), with a total exercise test time expected to fall within 8-12 min (19,20). The termination criteria included reaching the target heart rate, as well as monitoring for various cardiac abnormalities such as frequent ventricular premature contractions, polygenic ventricular premature contractions, ventricular tachycardia, paroxysmal supraventricular tachycardia, ventricular fibrillation, slow heart rate, angina, decreased blood pressure, dyspnea, shortness of breath, fatigue, inability to persist, and ischemic ST segment depression (21).…”

Section: Intervention Programsmentioning

confidence: 99%

Effects of a Tai Chi rehabilitation program implemented using a hybrid online and offline mode on oxidative stress and inflammatory responses in patients with coronary heart disease: a randomized controlled trial

Cui,

Wei,

et al. 2024

Front. Public Health

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BackgroundCoronary heart disease (CHD) is the leading cause of death in both developed and many developing countries. Exercise training is a fundamental component of cardiac rehabilitation programs for patients with CHD. This study aims to investigate the effects of a Tai Chi rehabilitation program, which is provided through a hybrid online and offline mode, on oxidative stress and inflammatory responses in patients with CHD.MethodsA total of 34 patients with coronary heart disease were randomly assigned to two groups: an experiment group (n = 14, age 62.07 ± 9.076 years) and a control group (n = 20, age 61.90 ± 9.700 years). The experiment group underwent a 12-week Tai Chi cardiac rehabilitation program (TCCRP), while the control group followed a conventional exercise rehabilitation program (CERP) consisting of 1-h sessions, 3 times per week, for a total of 36 sessions. Participants were studied at baseline and post-intervention. The main assessments include the levels of Malondialdehyde (MDA), Superoxide dismutase (SOD), Tumor necrosis factor (TNF-α) and Interleukin-10 (IL − 10) in blood samples. Pearson correlation analysis was used, and the differences between the two groups were subsequently tested using two-way repeated ANOVA. Statistical significance was defined as a two-sided p-value of <0.05.ResultsThe key finding of the study reveals that MDA was significantly reduced by 1.027 nmoL/mL. Additionally, the TCCRP showed significant improvements in SOD and IL-10, with values of 10.110 U/mL and 2.441 pg./mL, respectively. Notably, a significant positive correlation was found between SOD and IL-10 (r = 0.689, p = 0.006), while MDA showed a significant positive correlation with TNF-a (r = 0.542, p = 0.045). In contrast, the ECRP group only showed a significant improvement in SOD.ConclusionThe study conducted a 12-week program on TCCRP, which utilized a hybrid online and offline model for individuals with coronary heart disease. The program showed promising results in alleviating oxidative stress and inflammation, possibly by regulating the balance between oxidative and antioxidative factors, as well as pro-inflammatory and anti-inflammatory factors.

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Influence of Different Treadmill Inclinations on V̇o 2max and Ventilatory Thresholds During Maximal Ramp Protocols

Cited by 4 publications

References 24 publications

External validation of VO2max prediction models based on recreational and elite endurance athletes

External validation of VO2max prediction models based on recreational and elite endurance athletes

External validation of VO2max prediction models based on recreational and elite endurance athletes

Effects of a Tai Chi rehabilitation program implemented using a hybrid online and offline mode on oxidative stress and inflammatory responses in patients with coronary heart disease: a randomized controlled trial

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