Purpose: In this study, researchers try to find the correlation between cardio-respiratory recovery index (CRI) and the maximum oxygen uptake. Using the interval running test, the time of exercising maintenance and recovery are measured, and furthermore, used to calculate the CRI of running. Method: The subjects are twenty of male college students (age 22.35±1.66 years, height 170.4±5.63 cm, and weight 66.85±11.95 kg) who exercise regularly. With the one within-subjects variable design, subjects are administered the interval running test with four stages of magnitudes (6.7-2.7m/s) on the treadmill, and later, their time of exercising maintenance, time of recovery, and maximum oxygen uptakes are measured. Result: The CRI (5.98±4.38) of lowest strength and longest running time has significantly greater than the others (4.00±2.76、3.96±2.75、3.75±2.26)with greater intensity and that doesn’t has statistical significantly correlate with the other two CRIs with greater intensity. The results show that the average CRI of these four stages and the total cardio-respiratory recovery index (TCRI) are 4.00±2.76, 3.96±2.75, 3.75±2.26, 5.98±4.38 and 4.26±2.49, when the maximum oxygen uptake is 49.62±6.89 ml/kg/mm. After calculating the Pearson Product-Moment Correlation Coefficient, it shows that the CR1 of each stage and the TCRI statistical significantly correlate with the maximum oxygen uptake (0.515, 0.673, 0.753, 0.734 and 0.817). Conclusion: The result of this study tells that CR1 and TCRI both can estimate the cardio-respiratory endurance efficiently. CRI can be interpreted as a person’s ability of cardio-respiratory recovery after running under a fixed intensity; TCRI can be interpreted as a person’s overall ability of recovery after different intensity (aerobic and anaerobic) of running.
Purpose: In this study, researchers try to find the correlation between cardio-respiratory recovery index (CRI) and the maximum oxygen uptake. Using the interval running test, the time of exercising maintenance and recovery are measured, and furthermore, used to calculate the CRI of running. Method: The subjects are twenty of male college students (age 22.35±1.66 years, height 170.4±5.63 cm, and weight 66.85±11.95 kg) who exercise regularly. With the one within-subjects variable design, subjects are administered the interval running test with four stages of magnitudes (6.7-2.7m/s) on the treadmill, and later, their time of exercising maintenance, time of recovery, and maximum oxygen uptakes are measured. Result: The CRI (5.98±4.38) of lowest strength and longest running time has significantly greater than the others (4.00±2.76、3.96±2.75、3.75±2.26)with greater intensity and that doesn’t has statistical significantly correlate with the other two CRIs with greater intensity. The results show that the average CRI of these four stages and the total cardio-respiratory recovery index (TCRI) are 4.00±2.76, 3.96±2.75, 3.75±2.26, 5.98±4.38 and 4.26±2.49, when the maximum oxygen uptake is 49.62±6.89 ml/kg/mm. After calculating the Pearson Product-Moment Correlation Coefficient, it shows that the CR1 of each stage and the TCRI statistical significantly correlate with the maximum oxygen uptake (0.515, 0.673, 0.753, 0.734 and 0.817). Conclusion: The result of this study tells that CR1 and TCRI both can estimate the cardio-respiratory endurance efficiently. CRI can be interpreted as a person’s ability of cardio-respiratory recovery after running under a fixed intensity; TCRI can be interpreted as a person’s overall ability of recovery after different intensity (aerobic and anaerobic) of running.