Waist to chest deep. Once learned, can be done in deeper water.
Start in standing alignment, holding the noodle with hands shoulder-width apart.
Engage the core and press the noodle downward in front of thighs.
Maintain straight wrists, neutral neck / spine, and scapular set.
Step back one leg at a time, until supporting the weight of the body on the arms / noodle.
Maintain stability of all segments, holding a straight, stable plank position, with the body inclined at 30 - 45°.
The feet can be touching the floor or floating. If the feet are not touching the floor (deeper water / more buoyant person), additional activation of abdominal and gluteal muscles will be required in order to maintain inclined plank alignment with the feet lower than the hips.
To end the exercise, step one foot forward below the shoulders; step in with the other foot, and stand up.