PROBLEM TO BE SOLVED: To provide a risk quantification device for injury during running exercise for easily and effectively quantifying a risk of injury that occurs during the running exercise by using a portable device easily worn by an ordinary person for the running exercise.SOLUTION: An IVLR prediction method includes: a data collection step of collecting an acceleration vertical signal by using an acceleration sensor worn on a part of a user's body; a high frequency signal extraction step of extracting a high frequency signal of an already set frequency or higher from the acceleration vertical signal by using a high pass filter (HPF); a peak value detection step of detecting a peak value between a first time point and a second time point from the extracted high frequency signal; an average value calculation step of calculating an average value of the extracted peak value; and a prediction value calculation step of calculating a prediction value of an IVLR (Instantaneous Vertical Loading Rate) by multiplying the average value by a prediction coefficient (k1).SELECTED DRAWING: Figure 6COPYRIGHT: (C)2020,JPO&INPIT【課題】一般人も容易に着用して運動できる携帯用の装置を用いて走行時に発生するケガ危険性を容易で効果的に定量化する、走行時のケガ危険性定量化装置を提供する。【解決手段】ユーザの身体の一部に着用された加速度センサを用いて加速度垂直信号を収集するデータ収集ステップ、ハイパスフィルタ(HPF)を用いて前記加速度垂直信号から既に設定された周波数以上の高周波信号を抽出する高周波信号抽出ステップ、前記抽出された高周波信号から、第1時点と第2時点との間のピーク値を検出するピーク値検出ステップ、前記検出されたピーク値の平均値を演算する平均値演算ステップ、および前記平均値に対して予測係数(k1)を乗じてIVLR(Instantaneous Vertical Loading Rate)の予測値を演算する予測値演算ステップを含む。【選択図】図6