A control method of an exercise monitoring system includes: a processing unit controlling a storage unit to store a detection result of an electrocardiographic signal detection unit, the processing unit calculating a heart rate every predetermined period of time according to the detection result of the electrocardiographic signal detection unit in the past predetermined period of time, and calculating a self-similarity parameter by using a de-trending fluctuation analysis method, the processing unit updating a first cumulative parameter when the self-similarity parameter is smaller than a predetermined threshold, the processing unit calculating a cardiac muscle pressure index positively correlated with the first cumulative parameter according to the first cumulative parameter, and the processing unit outputting an alert message through an output unit when the processing unit determines that the heart rate and the cardiac muscle pressure index have increased successively from the previously calculated heart rate and cardiac muscle pressure index for a predetermined number of times.一種運動監測系統的控制方法，包含：處理單元控制儲存單元儲存心電訊號偵測單元的偵測結果，處理單元每隔一預定時間根據過去預定時間內心電訊號偵測單元的偵測結果計算一心率，並使用去趨勢波動分析法計算一自我相似性參數，且當自我相似性參數小於一預設門檻值，處理單元更新一第一累計參數，處理單元根據第一累計參數計算出一與第一累計參數具有正相關的心肌壓力指標，且當處理單元判斷心率及心肌壓力指標分別較前次計算出的心率及心肌壓力指標增加的連續次數到達一預定次數，處理單元經由輸出單元輸出一警示訊息。
