I don't know the exact deets of this case or what the ruling was based on as I haven't had a chance to look at it yet.
However, as HH says. Is a ten miler of death plus the dog carry actually a requirement in line with the job spec? If it is, fair one. If not, then it is inherently discriminatory because a higher % of men will pass it. This isn't rocket science. It's 2018 and "we've always done this" or "why should it be easier than my day" just doesn't cut it. As others have said, particularly in the fuzz, the female approach brings something totally different to the party and having a 50/50 split is inherently desirable.