I've reduced the amount of time for each burst of running. I can do more actual running, this way. Before, I would get deflated, after two runs. Now I'm alternating 90 sec walking and 30 sec running. I'll do this, until it seems easy, then I'll up the ante.
After today's session, I found myself grinning at vaguely funny things and laughing out loud at something I remembered from a month ago. Is this a runner's high? LOL It's kinda nice. Like having one moderately strong drink.