We have seen how people think the list should be worded assuming that the "1 hour of" portion only applies to walking, but what I want to know is how would the text need to be worded - other than how it is in the book right now - if the "1 hour of" portion is meant to apply to all of the items on the list.
Here's four different wordings, for four different intents. Pick one to suit:
1. A long rest is interrupted by a continuous hour or more of strenuous activity. Such activity might include combat, overland hiking, helming or crewing a vessel, study or transcription of spells, or anything else requiring a similar degree of alertness and concentration. Simple watchkeeping or sentry duty for two hours or less does not interrupt a long rest.
2. A long rest is interrupted by any degree of participation in any combat, or by a continuous hour or more of strenuous activity such as overland hiking, helming or crewing a vessel, study or transcription of spells, or anything else requiring a similar degree of alertness and concentration. Simple watchkeeping or sentry duty for two hours or less does not interrupt a long rest.
3. A long rest is interrupted by an hour or more of strenuous activity. Such activity might include combat, overland hiking, helming or crewing a vessel, study or transcription of spells, or anything else requiring a similar degree of alertness and concentration. The time thus spent is cumulative, and should it total an hour or more the long rest is lost. Simple watchkeeping or sentry duty for two hours or less does not interrupt a long rest.
4. A long rest is interrupted by any degree of participation in any combat, or by an hour or more of strenuous activity such as overland hiking, helming or crewing a vessel, study or transcription of spells, or anything else requiring a similar degree of alertness and concentration. The time thus spent is cumulative, and should it total an hour or more the long rest is lost. Simple watchkeeping or sentry duty for two hours or less does not interrupt a long rest.
Howzat?
The first one, I think, words it the way you want.
Lanefan