I recently bought a Blueseventy Reaction full length wetsuit: my first wetsuit. I have swam 3 times with it including a 70.3 race last weekend. Each time I have used it, my arms and shoulders feel like they are going to fall off (as if I just did 100 pullups) after just 1/4 mile or so. For the race, I even had a friend help me pull all the "slack" possible to the shoulders and the same thing happened. It seems I am fighting the wetsuit causing a lot of wasted energy and completely destroying my swim time.

I read countless reviews on all the wetsuits and landed on this wetsuit because of how unrestricting it is said to be.

It is a size MT and I am just under 6'2" and 160lbs. So sizing should be just about perfect. It fits me quite well other than this issue.

I was thinking about stretching out the wetsuit by hanging it up by the "wrists" and maybe even adding weight to the "ankles".
If that still didn't work I am to the point of just cutting the sleeves to where it will basically be like a sleeveless wet suit and I can just wear the sleeves if its colder.

Is there any successful technique to help with this or did I just buy a wetsuit that doesn't fit me like it should? Any help with how to "break it in" or if that is even possible would be appreciated. Thanks