Thanks for reflecting on the length of careers so far - I hope the discussion continues. As
@lariko pointed out somewhere above, I have dabbled a little bit with the length of singles careers. I have looked at what the careers of participants in the Worlds 1947-2022 were like for men and women. This sample covers ofc only elite skaters, but as the discussion about career lengths are about them, I think it is ok. Oh, and also it is quite difficult to find out about the careers of skaters outside the sphrere of international circles.
The focus is on senior international competetive careers - this is also important in the general discussions and it is what most of the career data is about.
The 1990s mark a big change in the timeline from 1947 to 2022. The compulsory figures are abolished. The age eligibility limit gets raised to 14/15 (it was a bit ambiguous until 2015). The amateur rules were changed. So I have divided the material choronologically to before and after 1994 (ie according to the season when the skaters first participated in an international senior competition).
What came out clearly was that the average career has gotten longer since the 1990s. For women before 1994, the average senior career was 4,9 seasons and for those who had retired by 2022, it had risen to 5,7. Those who were still skating at that time, the average was 6,1 seasons. The post-1994 skaters usually also had an international junior career, 1,5 to 2,2 seasons on average. So, the latest and usually still active skaters are doing about 8 seasons in the international scene. (And I think the juniors are quite competetive these days, though without the attention that the seniors get.)
What is also interesting that the average starting age for senior careers was about 15 years before the age rules were set. The average retirement age was 20,4 years for those before 1994 and 21,5 for the later group (the current ones are even older at 21,9). For women, it seems that the good ones (those who become medalists in majors and/or champions) tend to start early and stay on later. There are not that many big names in the past who would have started their international competetive careers at the age of 17 or later - 147 medalists in majors in this material and 33 of them got to the scene at 17 or older (eg Rika Hongo and Bradie Tennell).
For men, the trends are similar, though the average starting age is 17-18 and retirement at 23-24 years of age. So, a little older than women and a little longer. The number of seasons has risen from 6,1 to 6,9 from pre to post-1994 and the current skaters have the average career length at 8,2 seasons. And of course, men have also junior seasons, 2,0 for the retired post-1994 skaters and 2,8 for currently active ones.
I do wonder about the differences in women and men's careers. And whether it is possible to change it so that women would also continue generally to their mid-20s? It will just take a very long time before the effects of the current age rules can be evaluated... And I also wonder whether women's careers should be evaluated with the same age criteria as men's?
I will finish this long post with an example from Finland. Kiira Korpi and Laura Lepistö are some of the most decorated women skaters from my country. Kiira skated 10 seasons in international seniors and if her biography and interviews are telling the real story, she did not really enjoy many days of that time, even when she did really good. Laura Lepistö had early injuries and her junior career was pretty long, but her senior career lasted only 3 seasons. She has talked about having been happy and content during her active career (I will read the bio when it comes out next year with great interest!).
So, Kiira had a respectable 10 seasons and was unhappy all the time, Laura despicably short 3 seasons, but with joy. Which one of them should be considered to have been in the wrong?