i would recommend 5x5 for strength as well. i workout just for fitness and to allow me to bike better. i base everything on legs day, pushing day, and pullling day. deads/squats, bench, dips, incline press, pullups, rows, standing rows. all of that 5x5, and some extra 2x10 to 3x10 sets for the bis and tris. has been working great for me so far. try pyramiding too.