regardt....I use a band similar to what bigcountry uses the only difference is mine are flat. You might be able to get some (likeCabelas)at Wal-Mart for a couplebucks. I don't know what kind of time you have avialable to be able to use these on the rig, but here's what I do. Since mine are flat, I tie the ends together and close them in a door jam at shoulder height. I put my left hand/fist against the wall and grab the band as close to the door as I can and pull back all the way to my shoulder like I am drawing my bow. Make sure you don't twist your body while you do it use your arm/back muscles to pull. As your muscles get stronger and you need more tension, double-up the bands and go that way. I also suggest doing this with both arms so you don't end up looking like the hulk on you draw side and gumby on you weak side. You can do the same for triceps and biceps by putting the bands higher/lower in the door frame/jam. You can workyour core muscles and shouldersfrom there too by standing sideways to the door, but don't stand with your shoulder against the door/wall and make sure your feet are about shoulder width apart. Bend you arm 90 degrees and pull across yourabdomin until your arm is 90 degrees to your torso. Make sure your upper arm stays still (except for rotating)while doing those or it won't help. I got my bands from a doctor because of shoulder problems as therapy (it sucks being small framed and everybody wants to stuff you in all the small places to fix vehicles), but after I worked with them 2-3 times a weekfor 3-4 months, my shoulders felt better/stronger and I could draw 70# on my bow effortlessly with either hand and i'm only 5'9 and weigh in at 145/150.

Hopefully bigcountry can verify this, but I was told that if you can't hold your bow out and draw strait back to anchor without raising/lowering your bow arm, twisting your body or almost bending over backwards/forewards,you're pulling too much weight. I have my left arm slightly bent (adjusted/advised by the guy I bought my bow from) and can pull my bow strait back to my anchor point without any effort. I watched a guy in Alaska hold his riser strait up in the air over his head and have to twist his body bending over backwards to draw the bow...he even went up on his tip-toes!

Longbows/recurves are a different critter all together.....there are a few what I will call "gifted" people out there that have a longer reach than what they should and can draw bows like that back to full draw andsome times over-draw them.....my cousin is one.......5'8", 170#with a 74" reach from finger tip to finger tip....what a freak! Truely a knuckle dragger...ha-ha!

Hope that helps a little and good luck. I'll try to find the exercises I did and post a link or something for you so you can see how they are done.