J Korean Acad Rehabil Med.  2007 Oct;31(5):541-546.

Comparison of Exercise Indexes between Knee Extension-Flexion Exercise and Treadmill Exercise

• Jang BH
• Yoon TS
• Park GY
• Lee SY
• Bae HS

Abstract

OBJECTIVE
To obtain clinical usefulness of knee extension- flexion exercise by comparing the exercise indexes between treadmill exercise and knee extension-flexion exercise and to collect reference of exercise indexes using knee extension-flexion exercise. METHOD: Sixty four young healthy subjects participated in two modes of exercise. Subjects performed exercise using isokinetic dynamometer in one leg knee extension-flexion exercise and treadmill running using Bruce protocol in treadmill exercise. We recorded oxygen consumption, heart rate during rest and exercise.
RESULTS
When comparing exercise indexes using treadmill exercise, we obtained relative exercise indexes using knee extension-flexion exercise, male 15.96%, female 15.77% in work rate, male 48.46%, female 52.53% in peak oxygen consumption, male 73.57%, female 80.82% in peak heart rate, male 65.97%, female 65.20% in oxygen pulse, male 56.07%, female 62.50% in peak tidal volume, male 82.56%, female 82.53% in peak respiratory rate, male 47.79%, female 49.48% in peak minute ventilation. In dynamic variables, we obtained male 266.82%, female 292.98% in ratio increase in oxygen consumption to increase in work rate.
CONCLUSION
Knee extension-flexion exercise showed enough response to evaluate cardiorespiratory function through low work rate. Therefore knee extension-flexion exercise may be used for an exercise tolerance test in patients who cannot perform established exercise tolerance test.

Keyword

Knee extension-flexion exercise; Cardiovascular function

MeSH Terms

Exercise Tolerance
Female
Heart Rate
Humans
Knee*
Leg
Male
Oxygen
Oxygen Consumption
Respiratory Rate
Running
Tidal Volume
Ventilation
Oxygen