re: OT Workout Brethren: Benching 2x per week..

I would seriously consider refraining from doing any weights at all that would require me to move around on a cast with an extra 50 lbs. Have you considered trying something different to change a routine up? Perhaps some static pullups (pause for 5 seconds with chest to bar on every rep). Perhaps some uneven pullups with one arm grabbing a rolled up towel and the other grabbing the bar? Doing a 10 set drop routine on wide grip overhead lat pull. Start at something heavy like 230 lbs or so and do 3 reps. Then drop weight by 10 lbs and do 3 reps. Continue doing that with no break until you get to 130 lbs for ten total sets. That's 30 reps. Youre muscles will be on fire. All youre really trying to do (which I know you already know this) is shock the muscle. Doing something completely off the wall and different could make you grow faster than you ever have and you dont have to stress your ankle at all. Just trying to help you think outside the box.