Abstract
blood analysis, cognitive performances, maximal exercise tolerance with gas exchange analysis, non-invasive cardiac output measurement and Near-Infrared Spectroscopy (NIRS) cerebral signals were measured before and after training. Results.–We found significant improvements in maximal power and VO2max, a decrease in maximal heart rate without other hemodynamic changes. Weight, BMI, fat mass, and waist circumference significantly decreased (P < 0.01), whereas no effects on biological parameters, nor on muscle mass were observed. Some cognitive tests for executive functions (Digit Symbol Substitution Test, P < 0.01; Digit span, P < 0.05) and memory (Rey Auditory Verbal Learning Test, P = 0.03) significantly improved. Regarding the kinetics of the NIRS signals during exercise, both deoxyhemoglobin (HHb) and hemoglobin difference between oxyand deoxyhemoglobin (HbDiff) had higher amplitudes after training (P < 0.05). Conclusion.– In addition to improvements in exercise tolerance, a program combining HIIT and resistance training could improve executive functions in overweight adults. These results were associated with changes in cerebral oxygenation measured using NIRS.
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