HydroFit Bulgarian Trainer
A curved half-moon water trainer for rotational loading, carries and hip drive — the water keeps the load honest through every rep.
Build balance and control on every rep.
The water shifts as you move, so you work to control it on every rep — building the balance and stability a fixed weight leaves out.
Common questions
Will it leak?
Each tool closes with a sealed screw valve and reinforced seams built to hold water under load. Close the valve and it stays put. If anything leaks in your first 60 days, we replace it — no questions.
How do I fill it and change the weight?
Fill from any tap with the included pump, add the dye, seal the valve. Add or pour out water any time to change the load — each size's range is listed above.
How is water weight different from a dumbbell?
The water shifts as you move, so the load is never quite where you expect. You brace, correct and stabilize on every rep — the control that carries over to sport. A fixed weight can't move, so it can't train that.
What's included?
The tool, a pump and dye where needed, a user manual, and free access to the HydroFit app and starter course — everything to fill it and start training.
Shipping and returns?
Free shipping on every order. Everything's in stock and ships in 1–2 business days. You get 60 days to try it, and if it's not for you, send it back for a full refund.
Which size should I get?
Check the size guide above — it lists the best-fit athlete and max load for each size. When in doubt, size to the heaviest load you'll want to train with.