Dunno if true or not, but during Beta I thought I noticed my health regenerated faster if I sat still vs. if I were doing excessive moving while waiting. Similar to how your HP/MP gain scaled the longer you stayed resting in FFXI.
Naiya | Mithra | Windurst | Rank 10 | 1st Lieutenant | Ragnarok
WAR: 75 MNK: 75 SAM: 66
RotZ: O | CoP: O | ToAU: O | Apoch Nigh: O
Naiyah | B.Elf | 85 Rogue | Stormscale
Doubleday | B.Elf | 85 Paladin | Stormscale