I suffer from Thoracic Outlet Syndrome (yep a syndrome) but it makes the arms turn blue/grey and things can get very painful; even doing lightweight flyes and rows can cause pain for 15 weeks, after one session, if I just happen to have a bad day that day.
However, though heavy lifting is contra-indicated for people with the condition, something I started suffering from after an accident in my childhood, I prefer to lift and push the limits. It does mean, though, that certain exercises are not compatible such as pull-ups, mainly because when the arms are overhead the power drops off significantly. With overhead work I tend to limit the duration of the set, no matter what the weightload and it took me a few sessions to realise why I was having issues with 3kg weights (a few years ago) yet I had the strength to go higher...only then did it dawn on me that it was the length of time the set was taking to complete.
It's one thing I have to keep a strict eye on because it is a degenerative condition, if it is pushed; having said all that, even carrying rucksacks causes blue arms depending on the weightload or the weather and the weightload conmbined etc.
Some weird lifts that I do are STDs, as I term them for the fun of it, which are Shopping Trolley Deadlifts, done when the trolley is full; it started as a gag when hubby was concerned about the weight of the goods we'd bought and he wanted to go for a walk around town to get something from another shop, at which point informed him that if I could lift it, then I could carry it. Of course, grabbing the meshed wire of the trolley makes it somewhat uncomfortable but it's fun and a challenge.
<message edited by 5kgLifter on 27 December 2011 16:07>