PROBLEM TO BE SOLVED: To accurately measure data related to the take-off of a foot even during running.SOLUTION: A measuring device includes an acceleration sensor 4 mounted on a living body for detecting acceleration and outputting an acceleration signal, calculates an acceleration signal AccY in an advancing direction and an acceleration signal AccZ in a vertical direction based on the acceleration signal output from the acceleration sensor 4, calculates a first signal FAccY_2 that smooths the acceleration signal AccZ in the vertical direction using a moving average during a first period, a second signal FAccY_1 that smooths the acceleration signal AccZ in the vertical direction using a moving average during a second period shorter than the first period, and a third signal T that integrates the acceleration signal in the vertical direction twice, and acquires a take-off timing which is estimated to be a timing at which the foot of the living body takes off from the ground based on each value of the first signal FAccY_2, the second signal FAccY_1, and the third signal T, and mutual relationships of each signal.SELECTED DRAWING: Figure 2【課題】走行時においても離地に関するデータを精度良く測定する。【解決手段】生体に装着され加速度を検出して加速度信号を出力する加速度センサ４を備え、加速度センサ４から出力される加速度信号に基づいて進行方向の加速度信号ＡｃｃＹと上下方向の加速度信号ＡｃｃＺとを算出し、上下方向の加速度信号ＡｃｃＺを第１期間の移動平均を用いて平滑化した第１信号ＦＡｃｃＹ＿２と、上下方向の加速度信号ＡｃｃＺを第１期間より短い第２期間の移動平均を用いて平滑化した第２信号ＦＡｃｃＹ＿１と、上下方向の加速度信号を二度積分した第３信号Ｔとを算出し、第１信号ＦＡｃｃＹ＿２、第２信号ＦＡｃｃＹ＿１及び第３信号Ｔのそれぞれの値及び各信号の相互の関係に基づいて、生体の足が離地したタイミングと推定される離地タイミングを取得する。【選択図】図２
