Learn

Training guides, drills and the research behind water-weight training.

comparison

Slosh pipe vs water bag: should you build one or buy one?

A DIY slosh pipe is cheap and awkward. A water bag is sealed, adjustable and packable. The honest trade-offs before y...

drills

10 water bag exercises that build real strength and balance

Ten water bag exercises for your whole body, with sets, reps and coaching cues, from carries and cleans to presses th...

drills

How much water to fill, and how to set up every tool right

Fill level sets both the weight and how much the water moves. How much to add for each HydroFit tool, how to change t...

guide

Every water training tool, explained, and which one you actually need

Water bag, aqua bag, Bulgarian bag, slosh pipe, kettle: the names overlap and the shapes do not. What each tool is, w...

comparison

Water bag vs kettlebell: when a moving load beats iron

A kettlebell is precise and predictable. A water bag never sits still. When each one is the better buy for strength, ...

comparison

Water bag vs sandbag: the honest difference before you buy

Both shift and fight back, but not the same way. How a water bag and a sandbag differ in feel, load, mess and carryov...

study

Unstable load vs unstable surface: why the difference decides if it works

The studies that praise instability training and the ones that warn against it are describing two different things. G...

study

Does water bag training work? Here is what the studies actually found

Four EMG studies and a balance trial, in plain English: what a shifting water load actually does for your core, balan...

guide

Water bag training: build control that transfers to your sport

Water shifts as you lift, so every rep trains balance and control, not just muscle. Here is how water bag training wo...

Get new training guides by email

Drills, setup guides and the research behind them — a couple of emails a month.