MyBuddy
Contributor
If I took a hot shower it was totally fine until it tightened again.
If you were bent, if anything I’d expect a hot shower to make it worse not better.
Back issues can definitely be exacerbated by the pounding of a rough boat ride, hauling around heavy gear, and less than optimal form during the dives. Like @Rayk was saying, exercises that strengthen the back and core when combined with some yoga stretches that target the hips and lower back will go a long way to stave off back pain.