Does any one do this?
recent thread
http://www.paddling.net/message/showThread.html?fid=advice&tid=1094564&PHPSESSID=7d2608723d464add6e432c99dfae282e
i do
on boards, in my tandem, in my solo when i’m sober. 
but, it’s tough. it’s one hell of a workout, and that’s coming from someone who loves to race marathon canoes – a grunt sport at best.
the view is incredible, and it’s a great way to work on strength and balance.
not overly impressed with the boards based on planing/surfing designs. they’re slow in the flats.
have never paddled a racing board like a bark though.
SUP’s
Tried it last week at Osprey Sea Kayaks in Wesport, Mass. It is a blast and a great workout. If you live in the New England area, Mike Simpson (osprey sea kayaks) is giving a clinic/demo this weekend at Collinsville Canoe and Kayak.