Floyd HeardMasters M35 400 metres world record progressionMasters M40 400 metres world record progressionMasters M45 400 metres world record progressionMasters M50 400 metres world record progressionMasters M55 400 metres world record progressionMasters M60 400 metres world record progressionMasters M65 400 metres world record progressionMasters M70 400 metres world record progressionMasters M75 400 metres world record progressionMasters M80 400 metres world record progressionMasters M85 400 metres world record progressionMasters M90 400 metres world record progressionTroy Douglas