In the past few years, we have covered plenty of rowers, ski trainers, and stand-up paddling training tools here. The Whipr gives you the best of all 3 worlds. It is a portable exercise machine you can take anywhere to get a full body workout.
The Whipr is great for stand up paddling, cross country skiing, and rowing exercises. It accepts handles, straps, and bars used with gym cable machines. According to the makers, more attachments will be made available for surfing, swimming, and kayaking.