The phrase "upright posture" means sitting or standing in a straight and balanced position, with your spine and body aligned vertically.
Sentences with «upright posture»
If you find yourself leaning forward and pushing the stroller with straight arms, eyes down, take a brief rest and resume pushing with upright posture and a strong core. (momstown.ca)
They are crucial for maintaining proper upright posture, and provide support in activities such as walking, jumping and running. (fitnessandpower.com)
But this new upright posture posed a problem for pregnant women. (sciencemag.org)