YOU SAID:
大股を開いて腰を突き出す
INTO JAPANESE
大股を開いて腰を突き出す
BACK INTO ENGLISH
Open your thighs and stick out your waist
INTO JAPANESE
太ももを開いて腰を突き出す
BACK INTO ENGLISH
Open the thigh and stick out the waist
INTO JAPANESE
太ももを開き、腰を突き出す
BACK INTO ENGLISH
Open thigh and stick out waist
INTO JAPANESE
太ももを開き、ウエストを突き出す
BACK INTO ENGLISH
Open thigh and stick out waist
That didn't even make that much sense in English.