Abstract
BackgroundIn order to classify and analyze the parameters of upper body posture, a baseline in the form of standard values is demanded. To this date, standard values have only been published for healthy men aged 18–35 and 41–50 years. Data for male adults aged between 31 and 40 years are lacking.MethodsThe postural parameters of 101 symptom-free male volunteers aged 31–40 (35.58 ± 2.88) years were studied. The mean height of the men was 179.89 ± 7.38 cm, with a mean body weight of 86.36 ± 11.58 kg and an average BMI of 26.70 ± 3.35 kg/m2. By means of video rasterstereography, a 3-dimensional scan of the upper back surface was measured in a habitual standing position. The means or medians, confidence interval, tolerance range, and group comparisons and correlations of BMI and physical activity were calculated for all parameters.ResultsThe habitual standing position was found to be almost symmetrical and the axis aligned in the spine, pelvis, and shoulder region, while the spine position was marginally inclined ventrally. The kyphosis angle of the thoracic spine was greater than the lordosis angle of the lumbar spine. All deviations fell under the measurement error margin of 1 mm/1°. The greater the BMI, the greater was the pelvic and scapular distance. The lower the BMI, the further caudally positioned was the right shoulder. The pelvic and scapular distances were also lower with the increasing athleticism of the participants.ConclusionThe upper body posture of men between the ages of 31 and 40 years was found to be almost symmetrical and axis-conforming, with the kyphosis angle, pelvic distance, and shoulder distance enlarging with increasing BMI. Consequently, postural parameters presented in this survey allow for comparisons with other studies, as well as the evaluation of clinical diagnostics and applications.
Highlights
In order to classify and analyze the parameters of upper body posture, a baseline in the form of standard values is demanded
There was a minimal deviation of the trunk of 0.34° to the left, the Confidence interval (CI) the CI ranged from − 0.56° to − 0.07° and the tolerance regions (TR) ranged from − 3.57° to the left to 2.04° to the right
Variations of the TR ranged from 7.99° to 23.32° and the CI varied between 14.90° and 16.41°
Summary
In order to classify and analyze the parameters of upper body posture, a baseline in the form of standard values is demanded To this date, standard values have only been published for healthy men aged 18–35 and 41–50 years. Back pain can result from, among other things, asymmetrical muscular strain (muscular imbalances) or tension that becomes visible through poor posture. It can be caused by occupational activities, such as lifting and carrying heavy loads in unsuitable postures, forced postures, or monotonous postures to a much greater extent than is the case in the rest of the population [3]. In 2017, the Federal Ministry of Health registered 2025 cases of incapacity to work, with 196.711 working days lost due to incapacity and an average incapacity to work of 97.14 days per case due to back pain [5]
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