CSV seems most reasonable. On another note, the UX is not supportive of entering stats while working out or form a mobile phone. Do you use it that way? I've even found most apps are not too slick for entering while working out and I've resorted to google spreadsheet on my phone, which actually works pretty well. I just don't get any charts or graphs out of it.
I hear you; the site is best on desktop atm with the way the 'workout view' is orientated but I hear you about wanting to do it on the phone. I'll think about how to deal with that.
