I've joined a regular gym with the aim to get fit(ter) and the concept 2 and barbell will be my main tools, fitted in around kendo practice which I'm now doing regularly again.
Started out this Monday with a 2k row at 8:3x. PB when I was regularly crossfitting, was around 7:30, so not too bad, considering my almost complete lack of exercise in the last 6-7 months.
I kept an even 800kcal/hr until 350 meters to go, pushed it up to 1400, but completely blew up 50 meters from the end.
Plan is shorter distances/intervals (2k below) on lifting days, with longer 5k+ rows on non-lifting days. Still very sore from Monday, so with kendo tomorrow, I wont get back until Saturday.
Best thing is that new gym is open 24/7, so should be easy to find a quiet time.
I expect a sub 8 min 2k in a couple of weeks.