Originally Posted by trekchick
Does any of the information on arm position matter if I'm double jointed?
Seriously, my arms bend backwards.
A couple concerns from your second video:
1. Yes, you are "casting" but I view that as an outcome of other issues. If you freeze frame your swing at the very top you will see a very stiff right leg with the appearance (the video is hard to see in detail even with full screen) of your weight going toward the outside of your right heel. This is quite common with newer golfers who tend to "lift and drop" more than having the upper body turn against a stable and flexed lower body building the energy they will release during the forward swing. A locked right leg can be the precursor of a lot of difficulties in the forward swing. (And viewed by many instructors as a "death" move from which there is little hope of recovery.)
2. If you look at your position at impact and compare it more accomplished golfers (find a few golf magazines and look for a tour pro's position at impact) you will find they have cleared their hips, opening them up toward their target and allowing the arms to freely swing through down the target line. With your swing (and again this is characteristic of many newer golfers) your hips haven't "released" because your are "casting" and swinging with your arms first. This will definitely cause a leakage of potential power. Try a few swings where you feel like you are holding your back to the target as long as you can.
3. In terms of a "straight" arm think instead of "an "extended " arm. Straight implies locked and tension which, in this case, would be a no no. A lot of students I worked with this summer had similar issues. We tried to think of extending the left arm back away from the target in the backswing and extend the right arm out toward the target after impact. A mantra I got a lot of them to use was "extend back then turn your back away from the target (this sequencing precludes taking the club to far inside to early and getting trapped) while maintaining flexed knees, then turn forward and extend toward the target. Kind of the Cliff notes version-I'm trying to load the car and clean house so I can head to Florida on Thursday.
Have a great winter-I'll be checking in frequently. And no, I am not going to try to ski the Basin on opening day tomorrow before I leave.