Bala 皮拉提斯球（無重量）

I’ve been using this ball for core rehab exercises and the half-filled option really challenges my balance without being too bulky. The smooth texture grips well on the floor, too.

The firmness is perfect when I over-inflate it for extra support during planks, and it’s surprisingly durable so far. It’s helped me engage my core in ways I didn’t feel with regular floor exercises.

Half-filling this ball really does force your core to work harder during simple exercises. I’ve noticed better stability in just a week of using it for my home workouts.