Did not find this in a search, so it may not have been mentioned yet:
p. 136: You can run non-stop for a maximum number of minutes equal to your (Body + Running) x 10. Fatigue damage begins to take effect after this point (see Fatigue Damage, p. 172).
p. 172: If you’re only running (using your running movement rate) instead of sprinting, this damage is taken every 3 minutes.
Recommended fix:
p. 136: You can run non-stop for a maximum number of minutes combat turns equal to your (Body + Running) x 10. Fatigue damage begins to take effect after this point (see Fatigue Damage, p. 172). (20 Combat Turns is equal to one minute.)
p. 172: If you’re only running (using your running movement rate) instead of sprinting, this damage is taken every 3 minutes interval equal to your (Body + Running) x 10 Combat Turns. (20 Combat Turns is equal to one minute.)
Also:
p. 137: The 'Using Swimming' section on p. 137 directs the reader to p. 172 for long-term fatigue, but p. 172 has no specific rules for swimming. This should be clarified, even if only to change/reword/expand the 'Fatigue From Running' section to be 'Fatigue From Running and Swimming', using the same rules.