Back to Strength Training

I had my 6 week post op checkup last Wednesday. I met with the excercise physiologist and he cleared me to start doing some strength training in addition to the cardio I've been doing. Man I was unaware of how weak I had become. I'm not sure if it's related to the surgery or that I've really done no strength training for so long. I'm hoping that it is just getting back into the swing of things and it will come back quickly. Oh well I'm looking at everything as being a fresh start.