Page 92 of 1976 T&F news "Lasse and Blood Doing". Check out these sequence of marks in an 11 day time frame.
1976 Olympic Games
July 23rd 1976: 10K heat Viren, 3rd in 28:15.0
July 26th 1976: Olympic 10K Final, 1st 27:40.4 (14:09/13:31)
July 28th 1976: 5K heat:4th, 13:33.4
July 30th 1976: 5K final, 1st 13:24.8 (last 1600 4:05, last lap 55.4)
July 31st: Marathon 5th 2:13:11
August 4th 1976 Philadelphia Pa. 2-Mile 1. Dick Quacks(NZ) 8:17.1 2. Duncan Macdonals (USA) 8:19.9 3. Lasse Viren (Fin) 8:21.5( to me this is one of the most phemominal races ever, an 8:21 two mile 5 days after running a marathon).
Maybe that is why the article asked the question.