the wide grip worked good for him. He built one of the most massive chests in Bodybuilding. That this kind of hardcore workouts for so many years can lead to injuries (he also suffered a pec injury) is no secret. He had his time (been in the Mr. O & Arnolds Finals, winning the NOC....), and made some Money with his attitude beeing "the german beast".
Rühl was made of "Genetic" "medications" "+ "much of real hard training and dedication".