As I think about this some more, I realize that the terms "rebroadcast" and "broadcast" aren't the same. The Vivoactive series does not receive a signal from a chest strap and rebroadcast to another device. However, according to my experience and the manuals, when properly setup, Vivoactive devices will broadcast the optical sensor hr value from the watch itself to compatible devices. I believe all you want is for the optical hr sensor to be picked up by the Wahoo Bolt. It should work.