Form is everything when it comes to exercise. If you perform a move incorrectly, it can lead to pain and injury.
When completing the following upper body workout, make sure that you keep you core in tight, arms high when necessary & make those T shapes nice & strong.
Disclaimer: I am not a personal trainer or fitness professional, just a gal who likes to exercise. Consult with a doctor before beginning any exercise routine. If anything hurts (in a bad way), STOP.