I've been reading some books and most seem to suggest using a muslce-free arm swing. They suggest either a push-away or drop-away start and let the weight of the ball do the rest. This makes sense, but after watching the pros, some of the better bowlers at my house, and even the videos posted here, it seems that most do not use the free arm swing.
How high of a backswing can you get by just dropping the ball and letting it swing back? Personally, after watching video of my self, I notice that I use a controlled/muscled back swing and very rarely get the ball more than waist high. I find that easier to control and makes for much more accurate shots.
When I first started bowling I tried the free arm swing and noticed that I got much more lift (and physically being able to feel my thumb come out first - almost like a dropping sensation) but I also had more arm pain. I've since moved down in weight, but notice that I throw the ball at the same speed as before (I thought I would get more speed by moving down). I no longer have any arm pain, but I also no longer can tell if my thumb is exiting first.
Anyways, I've been watching the PBA this season and noticed that almost all of the pros have back swings that come up to shoulder level or higher. They all start with ball between chest and waist high, and it just looks like they are muscling the ball to get it up that high.
I've experimented a little and when I try to get my back swing higher I get more ball speed, but I also have a harder time controlling my release and accuracy. I also noticed that I tend to keep my elbow bent (just slightly) through the entire process (push away, back swing, and delivery), and when I try to keep my arm straight I have the same problem (no accuracy).
Any thoughts/ideas as to which is the proper way? Is it possible to drop the ball from waist height and using a muscle-free armswing to have the backswing get shoulder high?