This study purpose is (1) to develop the new energy expenditure equation; (2) to increase accuracy of energy cost prediction of cycle ergometer; (3) to find out some dependent factors.

Oxygen consumption (ml/min) was measured while subjects were at rest and exercised at four submaximal workloads in steady state on cycle ergometer. Bioelectrical impedance analysis was used to estimate the body fats and skeletal muscle mass.

Inclusion Criteria:

• Healthy female
• Never received bicycle training

Exclusion Criteria:

• Exercise testing contraindications

healthy female