I ended my short swim last night w/ some vertical kicking, arms crossed over chest. That feels great for about 10 seconds. Then, as a sinker, it’s a solid challenge for about another 20 or so before I grab for that comfy wall. I probably went for a total of 2 meager mins. Definitely feel it in my hips/groin today.
Valuable? Worthless? My knee has kept me off the bike/run for a month, and even flat kicking has been a problem. For whatever reason, vertical kicking didn’t seem to bug it.
We do them once in a while 8x2 minutes alternating kick styles. Fun, fun, fun. Just about as fun as those days when we do 50 situps and 20 pushups between 100’s.
There’s no easier way to work on proper foot mechanics while kicking.
Vertical kicking is possibly THE ONLY way to fix someone’s kick timing when they have that all screwed up. You can read Emmett Hines’ thoughts on the matter here in his bottom up swimming series of articles.