Eli5: From the early 20th century until now the 100m sprint world record has improved for over a second. Is it only better training, or have the doping methods developed to the point of being undetectable?

Question

Eli5: From the early 20th century until now the 100m sprint world record has improved for over a second. Is it only better training, or have the doping methods developed to the point of being undetectable?

In: Biology

Answer 1

Based on quick googling the improvement of the record was only about 0,3 s (10,2->9,9) during when modern doping became available. Considering that other improvements mentioned in this tread happened during that time too the doping “only” seems to give like 0,2-0,3 s advantage on these records.