Athletic Performance
Conditions
Interventions
The present investigation is characterized as a randomized, double-blind, crossover clinical trial. Participants will be randomly allocated to different experimental conditions using a software-genera
Sponsors
Universidade Federal de Santa Catarina
Universidade Federal de Santa Catarina
Eligibility
Sex/Gender
Male
Age
No minimum to 40 Years
Inclusion criteria
Inclusion criteria: Male participants aged between 20 and 40 years. Volunteers must be active cyclists who perform training sessions at least three times per week, totaling a minimum of 8 hours of weekly cycling sessions. Additionally, they must have at least two years of practical experience in training and competitions within the modality. All participants must be free of pre-existing comorbidities and must sign the Informed Consent Form (ICF) prior to the performance of any study procedures.
Exclusion criteria
Exclusion criteria: Individuals who regularly use tobacco (smokers) or who have sustained any type of musculoskeletal injury within the 40 days prior to the start of testing. Additionally, participants presenting clinical contraindications for maximal physical exertion or those who fail to fully comply with the supplementation protocol and the established washout requirements will be excluded.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| It is expected to find a significant improvement in skeletal muscle oxidative capacity, assessed by the recovery constant of the metabolic rate of oxygen (mVO2) after short-duration exercise, following acute beetroot juice supplementation compared to placebo. Additionally, it is expected to observe changes in the muscle oxygen extraction reserve (REM), measured by the range between the highest deoxyhemoglobin (HHb) value in the incremental test and the plateau obtained during a total arterial occlusion of approximately 2 minutes post-exercise. These parameters were fundamental for determining the sample size and the effects of the intervention | — |
Secondary
| Measure | Time frame |
|---|---|
| It is expected to observe changes in cardiorespiratory variables, such as maximum oxygen consumption VO2max and maximum heart rate HRmax, obtained during a maximal incremental cycling test. Furthermore, it is expected to find improvements in neuromuscular performance, assessed using parameters derived from the Torque-Cadence and Power-Cadence relationships during maximal cycling sprints. Autonomic modulation will be evaluated by analyzing heart rate variability (HRV) using the SD1 and SD2 indices of the Poincaré plot at rest and post-exercise. Finally, it is expected to observe metabolic and perceptual responses by measuring blood lactate concentration [La] and the rating of perceived exertion (RPE) using the Borg scale from 6 to 20 | — |
Countries
Brazil
Contacts
Public ContactEduardo Marcel Nascimento
Programa de Pós Graduação em Nutrição
Outcome results
None listed