Biochemical and Physiological Responses in Sedentary Subjects During the Evaluation of Maximum Oxygen Uptake

Keywords: Lactic Acid, Aerobic Exercise, heart rate, Blood Glucose


Introduction: The use of incremental exercise tests (IET) to evaluate the individual’s acute responses is an essential tool in Physical Activity Science.

Objective: This paper aims to analyze the behavior between biochemical and physiological variables as aerobic-anaerobic transition indicators during two incremental exercise tests, which measure the maximum oxygen uptake in healthy subjects.

Methodology: The sample consisted of two individuals, who were thirty-three and twenty-five years old, respectively. During the execution of the tests, the following materials and tools were used: a portable glucometer, a portable lactometer, reactive tapes, a treadmill, a stationary Cycle Ergometer Monark®, a heart rate monitor Polar®, a gas analyzer, software Breeze®, a computer, tools for recording data, and a pencil.

Results:  the high inverse correlation between the Glycemic index and VO2 (r: -0,853) and the Glycemic and CO2 (r: -0,851) are notable. Moreover, the detection of thresholds for each subject through blood lactate invasive and non-invasive methods, such as heart rate (HR), is also shown.

Conclusion: A clear explanation of Respiratory Quotient (RQ) behavior is given during the Cycle-ergometer test, concluding that this type of protocol is safe for the group under study and that the validity of the results is in accordance with theoretical expectations.


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How to Cite
Lozada-Medina, J., Padilla-Alvarado, J., & Cortina Nuñez, M. (2023). Biochemical and Physiological Responses in Sedentary Subjects During the Evaluation of Maximum Oxygen Uptake. MHSalud: Revista En Ciencias Del Movimiento Humano Y Salud, 20(1), 1-14.

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