I just think it is misleading to compare fitness across eras except by including a relativity against other sides in the competition at the time.
So, footballers in 2006 are fitter and stronger than they were in the 1930s, but does that mean that sides now are much better than in the 1930s? I don't think so.
However, if the argument that the Swans of 2006 are fit relative to other teams in the competition in the same era, whereas the 1996 side does not have that attribute, then I think that is a reasonable argument.
So, footballers in 2006 are fitter and stronger than they were in the 1930s, but does that mean that sides now are much better than in the 1930s? I don't think so.
However, if the argument that the Swans of 2006 are fit relative to other teams in the competition in the same era, whereas the 1996 side does not have that attribute, then I think that is a reasonable argument.

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