casual obsever wrote:
Which data do you use for that? Average of the top 50, or the 50th best or something?
Looking at the very top, I don't see that at all.
World records pre and post carbon shoes (road: 2016; track: 2019)
Marathon 2:02:57 (’14) – 2:01:09 (’22) – 2.6 s/km in 8 years
Half marathon 58:23 (’10) – 57:31 (’21) – 2.5 s/km in 11 years
10000 m 26:17.53 (’05) – 26:11.00 (‘20) – 0.7 s/km in 15 years
5000 m 12:37.35 (’04) – 12:35.36 (’20) – 0.4 s/km in 16 years
3000 m 7:20.67 (’96) – unchanged
1500 m 3:26.00 (’98) – unchanged
800 m 1:40.91 (’12) – unchanged
400 m 43.03 (’16) – unchanged
200 m 19.19 (’09) – unchanged
100 m 9.58 (’09) – unchanged
Top 100 average world and US compared to previous 10-year average. It’s possible that ‘21 and ‘22 are an anomaly so we can’t know for a few more years what the effect of the shoes is. I don’t know why, but US time improvement for ‘21 and ‘22 are much more extreme (especially indoor). For US men’s 10000m ‘21 and ‘22 are average 20 seconds faster than average previous 10 years.