earticle

영어

The talk test (TT) is a subjective, self-administered method used to gauge aerobic exercise intensity based on a person’s ability to speak comfortably during physical activity. This study aimed to validate the TT by examining its relationship with physiological markers collected during cardiopulmonary exercise testing (CPX) on both a treadmill and stationary bicycle in healthy adults. Twenty-two healthy participants (17 males and 5 females), with no known musculoskeletal, cardiovascu-lar, or pulmonary conditions, completed two exercise sessions—one on a treadmill and another on a stationary bicycle. Each session was structured into three stages of increasing intensity based on the TT. During each stage, various psychophysiological and cardiorespiratory variables were measured, including heart rate, rating of perceived ex-ertion, metabolic equivalents, arterial oxygen saturation, respiratory rate, minute ventilation, oxygen uptake, carbon dioxide production, re-spiratory exchange ratio, and ventilatory threshold. Significant differ-ences were found across the three TT stages for all measured variables, with values increasing linearly as intensity progressed. However, no significant differences were observed between exercise modalities (treadmill vs. bicycle) or in the interaction between TT stages and mo-dality. The findings support the TT as a valid indicator of exercise inten-sity, correlating well with physiological responses measured during CPX. The consistency across both exercise modalities suggests that TT is a practical, effective tool for guiding aerobic exercise intensity, par-ticularly in clinical and rehabilitation settings.