I'm no expert, but I did a bit of a search. You might want to check with your doctor to be absolutely sure there's nothing you're missing.
This article was pretty thorough and should give you an idea as to whether it's likely that you'll spread the poison ivy oils to your gear. (Yeah, I worried about the gear, first, too. But it's not about the gear...it's about the rash you could get later, of course.)
Poison Ivy Dermatitis
If the rash is 4 or 5 days old and it's clearing up (i.e., you're not getting any new rashes), I would think that you've probably washed away any of the remaining poison ivy oil, and by now you've probably washed or cleaned any of the clothes, tools, or whatever that came in contact with the oil. At least I hope you have. So you're unlikely to get the nasty oil on your gear unless you touch it with stuff that has poison ivy resin on it. The stuff that's on your skin has already reacted with your skin and bonded with it. The stuff that's oozing out of your blisters apparently doesn't count.
The website above had this to say:
"
The best thing to do if you know you've been exposed to poison ivy / oak / sumac is to wash your skin immediately with rubbing alcohol (or TecnuŽ), in which the resin is soluble. Beer or other beverages containing alcohol will help to dissolve the resin if rubbing alcohol is not available. Soap works, but not as well. If the oil has been on the skin for less than six hours, a thorough cleansing with strong soap, repeated three times, may lessen or even prevent a reaction.
If you do wash with soap, make sure you do it in the shower so the resin is washed down the drain, not deposited in a slick on the sides of the tub to spread to others. If you can wash the area with plain cold water within a few hours of being exposed you may be able to remove a lot of the urushiol. Use a LOT of COLD water. Be aware that the water is simply spreading the oil around; the idea is to use enough water to wash all of the oil from your body.
Do not use hot water which can open your pores to the oil.
The resin is absorbed quickly into the skin. If the oil is on your skin for as little as ten to fifteen minutes, it can lead to an allergic reaction. The eruption is characterized by redness, papules (bumps), vesicles (blisters) and linear ("in a line") streaking. Mild cases can last 5 to 12 days. More severe cases can last up to 30 days or longer.
The eruption usually appears within two or three days but may occur within eight hours. The eruption rarely is delayed longer than ten days.
Once the rash appears, the original oil has all bonded to the victim's skin, so it can't be spread to others.
Contrary to popular belief, the fluid in the vesicles or blisters is not allergic and will not spread the rash. The blisters are the body's natural allergic reaction to poison oak and poison ivy. If the blisters break and ooze, the fluid does not contain the oils that cause spreading. The rash will frequently break out in stages and continue spreading for the first 1 or 2 days.
If new areas of rash appear after 3 days, you are probably getting re-exposed to the plant oils, most likely from contaminated clothing, tools, or even your cat or dog (their fur protects them but can harbor the oil for a prolonged period of time). As mentioned above, the resin will remain on any exposed (but uncleaned) objects such as clothing or equipment. If you put on your exposed shoes a week later, you can wipe the resin from your shoes onto your face or other areas."
a few other links that say similar things:
poison ivy
Swimming With The Poison Ivy Or Oak Rash - DrGreene.com - caring for the next generation
I didn't see any warnings against engaging in vigorous exercise, so I have no idea whether that would make you feel worse or not.
Certainly I've exercised while suffering from maddening skin rashes (I am prone to eczema/atopic dermatitis) without huge ill effects, although sometimes the sweat could sting and irritate my skin, and sometimes I was not a happy camper as a result. Supposedly heat can make you feel worse, too. So it's possible you might get kind of uncomfortable getting all hot and sweaty. I'd be more cautious of course if your rash was still really, really severe.