Gotta ask the question. If you think this is a good idea for Allen59 with his chronic injuries then perhaps a good method for you too?
Craig Mottram raced at around 72 to 74 kgs at 188 cm tall. 3.48 mile, 12.55 5000, 27.34 10000. Bronze at Worlds. He went alright.
His brother Neil wisely stuck with basketball. Neil played pro basketball at 105 kg and 205 cm tall,
Ron Clarke ran more than 20 WRs in his career.
Ron was 183 cm and raced at 72 kgs.
Ron's brother Jack could run pretty well too. Fortunately for Aussie football fans Jack stuck with that sport as he was a champion at it. Jack was 175cm an 70 kgs.
John Walker was the first man under 3.50 for the mile and won OG gold, ran well over 100 sub 4s.
182 cm 76 kgs.
Peter Snell, just the 3 Olympic golds, WR at 800/880 and the mile. 179 cm 77kgs
Vladimir Kuts, OG 5000/10000 double WR holder. 172 cm. 72 kgs.
Emil Zatopek, 4 OG golds and a silver. A few WRs, 174 cm 70 kgs.
Derek Clayton. He was the first man under 2.12 when he clocked a 2.09 at Fukuoka in 1967, also first sub 2.09 Antwerp 1969. The Beast was 188 cm and 72 kg in his racing days.
South Australian star Kerry O'Brien managed WRs at 2 miles indoors and in the 3000 m SC, 4th in the 68 OG steeple. 180 cm and 74 kgs.
Rob De Castella was the first World Marathon Champion. The first man to break 2.08 at Boston, 180 cm and raced at 68 to 70 kgs.
Interview with Ernst Van Aaken.
(Would you have advised a big boned heavily muscled runner like Prefontaine to lose weight?)
"He probably couldn't havr brought his weight down further, any more than Norpoth could bring his weight down further. Every person has his own weight where he has gotten rid of practically all the fat. He can't get down lower than that."