Illnesses of which bodypart hurt or kill three giant strongmen?

Louis Cyr (1864-1912), 5'9", 315-360#, have belt 1891, buckle say "Fortissimus" (Strongest, in Latin), he wager belt in strength contests against many men 15 years, never lose. 1895, he backlift 4333#, no man beat it 62 year. Paul Anderson (1933-1994), 5'10", 330-375#, back lift 6370# 1957, squat 1230#. By 1955, 2 men jerk 400+ over head, Karl Swaboda 409 in 1912, Charles Rigoulot in 1931, Paul jerk 440, press 409. My lover Kyojin 6'1", 355-370# lately, squat 800, bench press 650, deadlift 730 at gym. Louis last contest 1906, ill, not lift well, die 1912. 1994, Paul die similar illness kill Louis. 2003, Kyojin have surgery for similar illness kill Louis and Paul. Illness of what part of body weak spot "Achilles heel" of 3 giant strongmen? I hear other strongmen have same illness too.