How to execute a query that gets only one value from the column?

I am trying to retrieve the unique _id from my table that i have created in SQLite. But it does not seem to like it and Im not sure what Im doing wrong here, any advice would be appreciated

/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
THIS method returns the EXERCISE ID, that corresponds to the exercise
passed and Bodypart passed
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
public int getExerciseID(String exercise, String bodyPart) {

    SQLiteDatabase db = myDBHelper.getWritableDatabase();


    String query = "SELECT " + myDBHelper.COLUMN_ID + " FROM " + myDBHelper.TABLE_EXERCISES + " WHERE " +
            myDBHelper.COLUMN_BODYPARTNAME + "=  \"" + bodyPart + "  \"" + " AND " +
            myDBHelper.COLUMN_EXERCISENAME + "=  \"" + exercise + "  \";";

    Cursor c = db.rawQuery(query, null);
    /*return exerciseID= c.getInt(c.getColumnIndex(myDBHelper.COLUMN_ID));*/
    int exerciseID = -1;

    c.moveToFirst();
    while (!c.isAfterLast()) {
        if (c.getString(c.getColumnIndex(myDBHelper.COLUMN_ID)) != null) {
            exerciseID= c.getInt(c.getColumnIndex(myDBHelper.COLUMN_ID));
        }
        c.moveToNext();
    }

    return exerciseID;
}