On the basis of the principle of lever in connection with knee joint, ankle joint, and structure of leg bone and muscles, this study aims to look into the following two problems :
1) The relation between leg - surength and knee angles in semi - erect...
On the basis of the principle of lever in connection with knee joint, ankle joint, and structure of leg bone and muscles, this study aims to look into the following two problems :
1) The relation between leg - surength and knee angles in semi - erect -posture and lying - posture.
2) Specific angles associated with the maximum leg - strength in the two postures. Leg - strength variations were measured ing six classes of knee angles form 106 to 165 degrees with the interval of 10 degrees, and the angles of the maximum leg - strength were read on the goninometer. The reliability was checked at one knee-angle class(146-155) by test - retest method. Some of the ma or findings of this study are
1) The highest leg - strength scores are obtained when subjects' knee angles are between 146-165 degrees.
2) Leg - strength scores increase with the knee angles between 106-145 degrees.
3) Leg - strength scores are relatively constant within the range of 135-164 degrees.