Comparatively determining effects of aerobic and anaerobic exercise regions on the cardiorespiratory and metabolic system during an incremental exercise test in trained subjects

Determination of aerobic fitness is one of the important issues in clinical medicine. The purpose of this study was comperatively evaluated the cardiorespiratory and metabolic systems in response to the aerobic and anaerobic regions of incremental exercise test.After giving a signed informed consent which was approved by the local ethical committee, total of 24 trained male subjects performed an incremental exercise test (15 W/min) until the limit of tolarance using an electromagnetically braked cycle ergometer. Respiratory gas exchange parameters were determined breath-by-breath using gas analyser system. Ventilator parameters were evaluated using turbin volume transducer. Twelve lead ECG was used to evaluate cardiac response. Anaerobic threshold (AT) was estimated using V-slope method. Paired t test was used to analyze data.Maximal exercise capacity, work rate at the anaerobic threshold, VO2max and VO2 for body weight was found to be 232.7±30 W, 156.2±24 W, 2931±317 ml/min and 42.8±6.6 ml/kg/min, respectively. Exercise capacity and VO2 for each kilogram body weight in response to the aerobic region was found to be significantly higer than the anaerobic regions of incremental exercise: 136.2 ? 25 W and 21 ml/min/kg versus 76.4 ? 19 W and 11 ml/min/kg (p<0.05).Determination of cardiorespiratuar and metabolic response during incremental exercise test could provide important information about systems capacity. However evaluation of aerobic and anaerobic regions of incremental exercise will provide much sensitive information. Optained data from the trained subjects may be use a reference values for future studies concerning patients, sedantary and well trained subjects.Key words: Exercise Test, O2 Uptake, Heart Rate, Anaerobic Threshold, Aerobic Fitness.