Time off? None. Sweat isn't going to interfere with any healing. It'll likely sting a little. But it won't be even as much pain as it was to get the tattoo. Just make sure you wash it really good when you get back from your run and follow whatever after care directions your artist gives you. Every artist I've had has given slightly different after care directions so I just do what they say for the tattoo they did.

They're as addictive as running!

I'm going next Tuesday to get some work done on my sleeve that I started three years ago and haven't had time to do anything with since. I'm also training for a marathon and I'm not worried about it affecting my training.

I got a half sleeve done last summer. I ran the same day as I got about 5 hours of work done on it.... Kept it wrapped in plastic since it was still oozing ink and blood (lol!). I made sure that I wasn't running when it was sunny until it was healed. Cloudy days, nights or evening were ok. Why? Because the sun causes a burning sensation (like a sunburn but 50x worst) because it reacts with the ink... And it will cause fading and other quality issues.

Sweat didn't interfere with healing.

I ride, however the same applies. I am in the process of completing my 3/4 sleeve. So for the last 6 weeks every 2 weekend has had limited to no rides. However I am still in the middle of winter and therefore still wearing long sleeve tops and jackets. I would still give it a couple of days just to settle before doing any training. Plus if you are having it done in the inner arm, expect swelling and you are not going to want your arm to be rubbing against your shirt.

No time off needed. Just clean post run, and follow after care instructions for lotion application and the like.

Nice. I am planning to get one on my chest but I will waiting until I take time off over Christmas to get it done. I am concerned that the chest area would be a bit sensitive if I did it while actively training.