농구 자유투 동작 시 비숙련자의 운동역학적 특성

The purpose of this study is to identify performance and characteristics of free throw motion in basketball through kinematic and kinetic data A total of 7 subjects participated; Unskilled university students. The experiment performed here in measured the movement route of the mean foot pressure, maximum foot pressure, and enter of pressure in four event zones (ready, maximum knee flexion, release event, and maximum knee extension) while they were wearing the plantar foot pressure measurement equipment under identical conditions. Also Kinematic variables(shooting time, joint angle, ROM, COM) are measured by inertial sensor. The major findings are as follows. 1. Shooting time was 0.26±0.02 sec and the center of gravity displacement is 35.42 cm. 2. The angles of the upper parts of their trunks was (MF: 85.47±9.21 deg, RE: 90.78±7.84 deg, SP: 5.31±4.18 deg), the wrist joint angle was (MF: 140.87±4.62 deg, RE: 181.74±3.81 deg, SP: 40.87±5.29 deg), the elbow joint angle was (MF: 75.28±8.92 deg, RE: 149.27±8.84 deg, SP: 73.99±9.95 deg), the shoulder joint angle was (MF: 112.80±10.23 deg, RE: 130.81±8.26 deg, SP: 18.01±7.73 deg), the knee joint angle was (MF: 100.35±8.89 deg, RE: 170.67±5.28 deg, SP: 70.32±7.29 deg). 3. When getting ready (RD) during a free throw, foot pressure was (right mean: 12.28±5.22 kpa, right max: 52.16±13.89 kpa, left mean: 15.88±3.67 kpa, left max: 58.71±10.52 kpa). 4. For the maximum knee flexion (MF) during a free throw, foot pressure was (right mean: 10.52±2.67 kpa, right max: 55.24±21.89 kpa, left mean: 18.45±6.42 kpa, left max: 62.87±16.20 kpa). 5. For the release event(RE) during a free throw, foot pressure was (right mean: 30.58±2.79 kpa, right max: 180.38±51.59 kpa, left mean: 31.24±3.25 kpa, left max: 202.16±64.92 kpa).