I don't see why Martin has to play all 82 games.
I also don't think Hyman has the stamina to play his style for all 82 games either because he plays so hard every shift.
Both played 82 last year, and will again unless injured. Hyman didn't seem to run out of steam last year, and played well in the playoffs. If he is on the 4th line, as is the case with your scenario, he would receive less ice time, so the idea that he wouldn't have the stamina seems odd. As for Martin, Babs believes that he reduces the amount of abuse Matthews, Nylander, Marner etc take when they are on the ice. He will be playing, period.