if sex == "m":
            if age <= 49:
                hrv_adjusted["meanNN_Adjusted"] = (hrv["meanNN"]-930)/133
                hrv_adjusted["sdNN_Adjusted"] = (hrv["sdNN"]-45.8)/18.8
                hrv_adjusted["RMSSD_Adjusted"] = (hrv["RMSSD"]-34.0)/18.3