There are some really good exercises that Veena recommends on her YouTube channel. She teaches an exercise with light weights for strengthening the wrists and forearms, and another exercise for strengthening the shoulders, especially the rear deltoids and rhomboids. For me, those videos were an absolute Godsend, because my left forearm and shoulder would sometimes hurt badly after intense poling, especially when using split grip, and I feel that the exercises Veena recommended in her tutorials strengthened the muscles enough to support those joints, so that I could continue doing the same moves in a more comfortable and safer way. I kinda messed up my rotator cuff a little bit when I got my first "cartwheel mount," because I was overusing it before I was strong enough. I feel that these exercises "cured" whatever minor injury I had caused myself. When I go to the gym, I still do her YTI formula, and her wrist/forearm exercises. Maybe if you start these exercises while you are saving to buy your pole, you can get a head start on protecting your joints and strengthening the muscles that will get taxed heavily by some challenging pole moves.
Also, if you don't have a gym membership or some light handweights of your own, Veena suggests in her video that you can do those exercises with other household items such as canned foods, since it is important to start these exercises with lighter weights. You can even benefit from doing these exercises without additional weights.
Cardiovascular exercise has helped my poling. For a long time I was only doing strength training, but no cardio, so that I could get stronger and larger without losing weight. So I was able to learn some pole moves requiring some strength quickly, but would get winded too easily. Pilates, yoga, and other exercises that use only the resistance of your own body weight while simultaneously giving you a stretch can be immeasurably valuable. There's a lot of abs and lats involved in inverts, so exercises engaging those muscles can be immeasurably helpful. Truthfully, as trite as this may sound, since poling is basically a full-body workout, almost all exercises can be helpful. For performing beginner moves like some spins and basic laybacks, strengthening your biceps, abs, lats, and shoulders will be a huge help. If you're fit and flexible already, you'll be able to learn some advanced moves pretty fast; but if you're not fit and flexible yet, poling can help you get there in a major way. Either way, you win!
Here are the links to Veena's exercise tutorials. I swear by these.
http://www.youtube.com/watch?v=7BC610fJ9K8
http://www.youtube.com/watch?v=Q8QzZnFkXn8