Active/sport Aneros

I often thought about it as well. Would be keen to see a product for that.
It would have to be small, soft and flexible, as you don't want to injure yourself. I was thinking something like a small oval-shaped silicone ball that sits inside your anus, just beyond the sphincter. One end should have a string that goes around your shaft and balls like a loose cockring and holds it in place and keep it from being sucked in. This would gently massage you during workout without injuring or tearing any delicate parts.
In the meantime maybe we can make our own. I am trying to find the right materials for it. Doing yoga or just going for a walk in the park would be amazing with this. The products that exist i think are too large and aggressive to do that.

The "Milk'It" from Square Peg has the right shape and is made from 100% silicone, but the size needs some reworking for it to be therapeutic.

Actually, been using the Vice again recently. It's the right shape, but maybe a different design on the tabs. Something flatter, and "tongue shaped". It should curve comfortably with the body, and allow for sitting without pressing in.

There have been a number of requests for a Maximus Syn.  If we get enough interest in it we may manufacture such an item. It's possible that might fit your application also. The head is round and bulbous and with a softer abutment arm and tab it should make it more comfortable for exercise.

Your Aneros Team