Originally Posted by birlyshirly
Of the factors you mention though - I don't see my grip or alignment causing the problem. Core strength? I'm not sure I see the relevance - would you mind elaborating?
I find it hard to see past lack of flexibility as the fundamental issue - I'd imagine mobility or freedom of movement is more influential on sequencing, rather than the other way round. But again, if you see things differently, I'd like to hear about it.
The way I see it, bending the lead arm makes the club feel a bit lighter when it comes time to rotate the shoulders on the downswing. I either have to use my muscles and stay stable or my weight could be moved backwards away from the target as a result of moving the club quickly (You have to overcome the inertia of the club, and if you don't move it on plane you have to keep overcoming it which takes more effort). This can lead to a loss of the steady head or weight forward, which are very key in a proper swing. There are other compensations that might arise, such as making a steep swing to use gravity more, keeping the club closer to my body (which can be accomplished by bending the left arm as well), or casting the club.
Sort of like choking up, bending the arm requires less torque to be generated by the body and legs to get the club moving on the downswing. With the straight arm, I can't rotate quite as fast while keeping the club along for the ride as I would with no club, but if I build up speed using my hip and shoulder rotation and don't allow the club to throw me off balance by overswinging, I can use the left arm as a longer lever when it's straight (with the RH supporting) and keep my body and hands and arc more stable. If I'm using a club that's too heavy or long, for example, I may feel the need to break in the left arm because my core and legs have trouble rotating with the proper speed. Bending the arm would shorten the lever and make the club feel light but I would be compensating like crazy depending on the amount of bend. In the same way, someone with a poor core strength, range of motion or flexibility could find my clubs or even their own too heavy to swing at my speed.
As for the grip and alignment, if they're not right then you have to compensate because the club may feel heavy or off balance during the swing.
Again, I'm not necessarily saying you need to keep the arm totally straight either, but it's something to be aware of at least. I have had time to deal with many of the aforementioned compensations myself. I hope that clarified the point a bit, but believe me a My Swing thread is a good idea. I got a few useful crib notes from mine and I've been meaning to grab some new video. It can help you find one or two small tweaks you might not consider, mine certainly helped my consistency and helped me improve on my own.