The issue is related repetitive motions made by the same muscles on a continual basis causes fatigue and damage due to the fatigue. You should examine your post

The issue is related repetitive motions made by the same muscles on a continual basis causes fatigue and damage due to the fatigue. You should examine your posture, change the motion and take appropriate breaks. Personally I use a different style keyboard and mouse at work and at home to change my movements and posture. I also make sure I take appropriate breaks but I tend to have attention issues so that's not a problem for me.