I warm up my shoulders, neck and hands with heated rice bags before cutting and sew. Stretching exercises before starting is a good thing too.
Take frequent breaks, every 15 minutes or so and strectch.
I like to cut for about 30 minutes and then do something else for 20-30 minutes, then go back to cutting.
I still find that I can only cut for a total of 2-3 hours in one day or my shoulder will give me fits :roll:
My Physical Therapist keeps stressing how important it is that we stretch for 10-15 minutes atleast 4 times a day. It doesn't have to be strenuous, just enough to get the blood and oxygen flowing to all areas to keep injuries/soreness from happening :wink:
Even for sitting and sewing :D:D:D