Result is still sacrosanct
Books on management make the point that the only constant is change. Trends appear in the preparation of teams and they’re willingly embraced. These are then replaced by the latest in best practice — usually from sports like American Football or Aussie Rules.
They have the financial resources to research and develop modern methods. Ice baths were in vogue seven years ago, but the latest research casts doubts on their effectiveness and they are no longer used.