The Aqua Sphere Stationary Swimmer
turns any backyard pool into and endless body of water. It can be used to tone muscles, burn calories, and improve stroke mechanics. It also makes a great teaching aid.
Aqua Sphere Stationary Swimmer
Great item, simple, and it's true, it's chafe free. Now I can take the best of my home pool.
Aqua Sphere or Tyr belt?
I've tied both the Aqua sphere (ankle wraps) and Tyr (waistbelt) tethers, and have found both to be effective for swimming in a backyard pool, and far cheaper than building a bigger pool.
In terms of value, the aqua sphere is a more complex product; the Tyr belt is basically a belt with a bungee cord. I've only used these a few times, so it is too early to assess quality and longevity.
I found the ankle-wrap style to be prefereable for flutter-kicking; because the Tyr uses a line that passes right up to the belt, it can get in the way unless it is raised well out of the water.
For breastroke, I actually prefer the Tyr belt; the ankle wraps boost the kicking phase, rather than providing resistance against it, and the stroke seems to go more naturally with the waistbelt tether.
So far, I haven't seen much difference on the dolphin kick, but I don't have good form anyway, so I'll let someone else comment on that one.