Getting into this thread a little late, but when my partner/girlfried at the time was training to do a distance race, I built a simple home gym from an anchor, lenghts of bundled up chain for different resistance, line and spare blocks, including one screwed to the floor for curls and the sheeting in motion, and it made a huge difference in her raw power. She especially noticed it when she compared a previous overboard session where she needed lots of help getting aboard to a post training one, and after three months of weights she yanked herself back on board all by herself no problem. Plus, as we age there's no substitute for weight bearing exercise for retaining bone mass...