Mainly light cardio on a bike (stationary of course) and stretching. I am experienced inverted, i,e. I hang upside down with some gravity boots. I made a special request of the doctor here to get me an inversion table when I was lengthening. They obliged, it helped a lot.  Get into inversion I would say. Either get some good quality gravity boots (teether hang ups are the market leader) or an inversion table if you have the space.  You need strong ab muscles and need to be quite fit to use the boots and bar.  With the table, you can control the degree of incline and you don't have to go complete 180, if you know what I mean