heavy weight low reps build muscle but some ppl can build muscle with lighter weight even if they are 6'2"
arnold was pretty strong...franco was stronger with some movements ......
but comparing arnold to strength freaks like JOJ and coleman, dorian etc.....theres no point
arnold used enough weight to build his body the way he wanted it, and enough weight to keep good form
i see too many pros with bad form and not going to complete failure .....although complete failure is not always the target...