The XSENSOR pressure mapping system (XSENSOR Technology Corporation, Calgary, Canada) was used to capture interface pressure readings during the five lying positions.

Search string: Healthy_female_18+_years_of_reproductive_age_(<49_years),_free_from_injury,_pain,_and_illness,_with_no_medical_condition_that_limits_ability_to_lie_supine_or_left_side.