Rest
… or …
Pick an activity.
Pick an activity you can do for one hour.
Walk, jog, bike, swim, row, hike, mountain bike, etc.
Report what metrics you have available (i.e. minimum, maximum, average) for things like:
– heart rate
– elevation
– speed
– temperature
– weather (sunny, rain, snow, wind, etc.)
– terrain (pavement, grass, gravel, etc.)