if you mean taping, stacking, arranging or making boxes, then yes they will work great.
But I would not wear any headphones while boxing. what happens if you get in the ear? sounds painful to me. However to mellow this answer out. if you can find the fit that keeps them from falling out. then sure shadow box all you want. The heart rate is not spot on, but it is a good general idea of what it is and can be used for fitness tracking.