You should choose a 45 cm ball if you are between 4 feet, 6 inches to 5 feet tall. From 5 feet to 5 feet, 5 inches, select a 55 cm ball. If you are between 5 feet, 6 inches and 6 feet, 2 inches, use a 65 cm ball. If your height exceeds 6 feet, 2 inches tall, opt for a 75 cm ball.
Similarly, it is asked, is exercise ball good for pregnancy?
The key is you want to avoid reclining in big couches, gliders and beds. As tempting as it is, it's best to sit upright with your pelvis slightly forward. Sitting on an exercise ball is wonderful for pregnant mamas. Be sure your ball is firm enough and high enough so that your hips are higher than your knees.
How do you sit on a birthing ball?
Sit so that your feet are flat and apart, so that your feet and the center of the ball make a tripod when you sit down on it. The ball should be firm and big enough so that your hips are equal or higher than your knees. Use a birth ball to help you do a gentle backbend to open your upper chest and shoulders.