Example: if you were moving the Hydro-Bell horizontally through the water and you were leading with the smaller end, it would create less resistance than if you rotated the bell 90 degrees and were leading with the larger side.
This principle allows students to adjust an exercise to meet their specific strength limitations and/or their exercise goals. You might start some warm-up moves with the bell turned to move through the water with less resistance at first and then turn the bell to go through the same movement with increased resistance. Additionally, you can work at higher speeds for a movement with the bell turned in the direction of less resistance. Since there are both fast and slow twitch muscle fibers you might want to work at various speeds to develop both types of fibers during your workout.