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Tundra lists 2 Maximal Oxygen Uptake clinical trials. Each listing includes eligibility criteria, study locations, and direct links to research sites in the Tundra directory.
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NCT07799662
VO2max and Substrate Crossover Point
This study aims to investigate the relationship between maximal oxygen uptake (VO2max) and the substrate crossover point during incremental exercise. A total of 20 physical education students are recruited to complete a maximal incremental treadmill test using the standard Bruce protocol. Indirect calorimetry is utilized to assess oxygen uptake (VO2), carbon dioxide production (VCO2), and energy substrate utilization patterns. The substrate crossover point is operationally defined at a respiratory exchange ratio (RER) threshold of 0.85, indicating the metabolic transition toward predominant carbohydrate oxidation. The primary objective is to evaluate how variations in aerobic capacity influence the timing, oxygen uptake, and heart rate (HR) responses at this metabolic transition threshold.
Gender: All
Ages: 18 Years - 30 Years
Updated: 2026-09-02
1 state
NCT06644014
Reducing Arterial Stiffness with a Smart Ring and AI-Guided Exercise
The goal of this three-month clinical trial is to study if wearing an Oura Ring and following the exercise guidance provided by an AI-based Advisor in the Oura App works to reduce arterial stiffness. It will also study the difference between different exercise protocols in reducing arterial stiffness and improving aerobic fitness. The main questions the study aims to answer are: * Can an AI-based Advisor provide useful exercise guidance that helps improve cardiovascular health and aerobic fitness? * Does regular exercise lower arterial stiffness measured with a clinical reference device and Oura Ring's proprietary Cardiovascular Age -metric and its estimated arterial stiffness? * Is there a difference between attending supervised high-intensity interval (HIIT) training sessions and following personalized exercise instructions for steady-state aerobic training? Participants will: * Follow Oura's AI Advisor's instructions at their own convenience, attend supervised training sessions, or just wear the Ring without changing their lifestyle * Visit an exercise physiology lab in the beginning of the trial and after three months for measurements in arterial stiffness, cardiorespiratory fitness, and body composition In addition, the study contains questionnaires investigating the participants' experiences related to lifestyle changes.
Gender: All
Ages: 30 Years - 65 Years
Updated: 2024-12-03
1 state