In about 7 months I wanted to take part in an activity that requires me to hold 25 lbs of metal awkwardly out in front of my chest for long amounts of time (while being physically active).
I do a little bit of running and am moderately in shape (I have a fast metabolism), but I have almost no upper body strength. I’ve recently started to do some rowing on a Bowflex machine.
Are there any suggestions on things I can do to build endurance and upper body strength?
One type of equipment I would suggest for you is battling rope. It’s great for what you are training for because some of the exercises and movements done with the rope will help improve your strength and muscular endurance (which is needed to play that instrument). There are numerous exercises which you can do with the battling rope in which you will engage your full body. A rope which is 50 feet long and 1.5 inches thick will do the job.