I don't know about you LIP, but I've learned not to smoke weed before a bath. Weed, as you all know, tends to increase your heartrate. Not so much when you have a high tolerance, but it's there. When I take a hot bath it already makes my heart pound like I ran a marathon, so I didn't find the compounding effect of weed very producting to the whole situation.
I do find though, that there's nothing quite so great as a hot bath to relax aching tense muscles.