I'm 44 years old and brand new to golf. I will be getting a few lessons soon but until then I have a question? I have limited rotation in my back swing to the point that my club head speed is barely 50-70 mph. My total distance with my 7 iron averages 140ish when I have a solid strike (with a launch monitor). My question is this. Are there any drills that you all have used yourselves that will increase mobility and actually give me a better rotation? At the moment when I get to the top of my back swing my left arm bends to compensate for the limited flexibility and this is affecting my ball striking I believe. Any links to websites with visuals would be helpful. Thanks in advance.