Next Article in Journal
Effect of Degradation and Osteoarthritis on the Viscoelastic Properties of Human Knee Articular Cartilage: An Experimental Study and Constitutive Modeling
Previous Article in Journal
Role of Occupational Footwear and Prolonged Walking on Lower Extremity Muscle Activation during Maximal Exertions and Postural Stability Tasks
Article

The Effect of Sitting Posture and Postural Activity on Low Back Muscle Stiffness

1
Department of Human Locomotion, Chemnitz University of Technology, Strasse der Nationen 61, 09111 Chemnitz, Germany
2
Mercedes Benz AG, Leibnizstrasse 2, 71032 Böblingen, Germany
*
Author to whom correspondence should be addressed.
Biomechanics 2021, 1(2), 214-224; https://doi.org/10.3390/biomechanics1020018
Received: 23 June 2021 / Revised: 28 July 2021 / Accepted: 4 August 2021 / Published: 12 August 2021
While it is generally recognized that prolonged sitting periods at work can harm the locomotor system, little attention has been paid to the impact of sitting behavior on muscle stiffness. This study investigated the effect of sitting posture and postural activity on lower back muscle stiffness in a controlled experiment in which participants sat at a desk for 4.5 h. Lower back muscle stiffness was measured before and after the sitting period. In addition, continuous recording of kinematic data of the lower back using an eight-camera motion analysis system was applied to quantify sitting posture and the level of postural activity. The results show that the prolonged sitting period led to a significant increase in muscle stiffness. Further, all participants spent a substantial amount of time in a slumped sitting posture, and the level of postural activity varied significantly throughout the 4.5 h sitting period. Those results suggest that the increase in lumbar muscle stiffness is presumably related to the often-preferred slump sitting posture and may help to understand how prolonged sitting periods can increase susceptibility to common pathological conditions such as low back pain. However, the results also leave some uncertainties that need further investigation. View Full-Text
Keywords: prolonged sitting; muscle stiffness; sitting posture; postural activity; sample entropy; sedentary behavior; biomechanics; back muscles prolonged sitting; muscle stiffness; sitting posture; postural activity; sample entropy; sedentary behavior; biomechanics; back muscles
Show Figures

Figure 1

MDPI and ACS Style

Kett, A.R.; Sichting, F.; Milani, T.L. The Effect of Sitting Posture and Postural Activity on Low Back Muscle Stiffness. Biomechanics 2021, 1, 214-224. https://doi.org/10.3390/biomechanics1020018

AMA Style

Kett AR, Sichting F, Milani TL. The Effect of Sitting Posture and Postural Activity on Low Back Muscle Stiffness. Biomechanics. 2021; 1(2):214-224. https://doi.org/10.3390/biomechanics1020018

Chicago/Turabian Style

Kett, Alexander R., Freddy Sichting, and Thomas L. Milani. 2021. "The Effect of Sitting Posture and Postural Activity on Low Back Muscle Stiffness" Biomechanics 1, no. 2: 214-224. https://doi.org/10.3390/biomechanics1020018

Find Other Styles

Article Access Map by Country/Region

1
Back to TopTop