The challenge the team faced was a familiar one in animal research: how to measure posture continuously without attaching markers, sensors, or harnesses to the animal. Marker-based systems require extensive animal preparation and can interfere with natural behavior, while manual observation is too imprecise for rigorous analysis. Their solution was a custom pipeline built around a stereo camera that records the animal from two viewpoints simultaneously, feeding the footage into a deep learning system trained to detect fifteen anatomical landmarks on the sheep’s body. The result is a markerless record of how the animal’s body position shapes its internal pressure landscape.

The technical core of the system is a two-stage detection process. First, a custom object detector locates the sheep in each frame, isolating the animal from its surroundings. Second, a landmark detection network identifies fifteen anatomical points on the sheep’s body, from the head and neck to the limbs and hooves. The team trained this network on footage from six sheep, giving it enough appearance variability to handle the low inter-individual variation within the species. The pipeline was designed to work on animals it has never seen before, without requiring additional labeling or retraining.

Once the landmarks are detected, the system reconstructs the sheep’s three-dimensional body position from the two camera viewpoints. This reconstruction is then refined using a smoothing process that enforces temporal continuity, ensuring that the record of the animal’s movement is stable and reliable. The team evaluated this refinement against the raw detections, confirming that the smoothed record is more consistent than the unprocessed data. The result is a stable, three-dimensional record of how the animal moves through its environment.

The final stage of the pipeline classifies the sheep’s body position into predefined categories, such as standing, lying, and other postures. This classification allows the team to segment video sequences into meaningful intervals, facilitating retrospective analysis and simplifying future research. The team trained this classifier on footage from six sheep, giving it enough variability to handle the low inter-individual variation within the species. The result is a system that can automatically segment hours of footage into meaningful intervals.

The team paired this posture pipeline with eight simultaneously recorded pressure signals, selected because they were critical to investigations of cerebrospinal fluid dynamics. The pressure channels are treated generically throughout the system, allowing the number and type of measurements to change without intrinsically tying the pipeline to a specific set of signals. The team synchronized the pressure recordings with the stereo footage, creating a complete record of how the animal’s body position shapes its internal pressure landscape. The result is a system that can correlate posture with physiology in a living animal.

The team evaluated the pipeline on footage from six sheep, confirming that it works on animals it has never seen before without requiring additional labeling or retraining. The annotated landmarks encompass frames from six sheep, providing sufficient appearance variability to support generalization given the low inter-individual variation within the species. The pipeline was designed to be modular, supporting flexible integration of new detection networks and pressure signals. The result is a system that can adapt to future advances in animal research.

The team acknowledged that the pipeline has limitations. The system records eight pressure signals that were selected because they were critical to investigations of cerebrospinal fluid dynamics, but the pipeline is not intrinsically tied to this specific set of measurements. The team also noted that the pipeline was evaluated on a limited number of animals, and that future work should expand the evaluation to more subjects. The result is a system that can adapt to future advances in animal research.

The team concluded that their markerless pipeline offers a new way to correlate posture with physiology in a living animal. By pairing a simple stereo camera with eight simultaneously recorded pressure signals, the system can interpret how body position shapes the internal pressure landscape of a living sheep. The pipeline was designed to be modular, supporting flexible integration of future advances in detection networks and pressure signals. The result is a system that can adapt to future advances in animal research.

Subject of Research: Physiology

Article Title: Automated 3D sheep posture estimation and telemetric pressure synchronization via a markerless computer vision pipeline

Article References: Roncoroni, M., Podgoršak, A., Kaufmann, A., Flürenbrock, F., Trimmel, N. E., Oertel, M. F., Zeilinger, M., Weisskopf, M., & Schmid Daners, M. (2026). Automated 3D sheep posture estimation and telemetric pressure synchronization via a markerless computer vision pipeline. Frontiers in Veterinary Science, 13, Article 1933870. https://doi.org/10.3389/fvets.2026.1933870

Image Credits: AI Generated

DOI: 10.3389/fvets.2026.1933870

Keywords: sheep, stereo camera, posture, pressure signals, cerebrospinal fluid, markerless, animal model, physiology, Automated, estimation, telemetric, pressure

Surface topography works by projecting raster lines onto the back and reconstructing a three-dimensional model from their curvature, a technique known as video raster stereography. Unlike radiography, it involves no ionizing radiation, making it suitable for repeated screening and long-term monitoring. The DIERS system automatically identifies anatomical landmarks, such as the vertebra prominens at the base of the neck and the lumbar dimples on the lower back, and generates quantitative parameters spanning trunk length, spinal curve angles, pelvic obliquity, vertebral rotation, and shoulder alignment. Previous research has demonstrated strong correlations between surface topography parameters and radiographic Cobb angles, with correlation coefficients exceeding 0.8, supporting its role as a complementary screening tool.

The study population comprised 980 men and 879 women with a mean age of 46.9 years, drawn from a health management center database collected between 2014 and 2021. Participants stood on a testing platform while the examiner projected light from above the neck to below the buttocks, capturing a 6-second acquisition. The system then calculated 45 parameters across six measurement domains: length measurements, trunk and pelvis imbalances, locations of postural reference points, spinal curve angles, spinal deviation, and shoulder-related parameters. Reference limits were defined as the 2.5th and 97.5th percentiles, providing population-based benchmarks for clinical interpretation.

Sex-stratified analysis revealed statistically significant differences between men and women in 31 of the 45 parameters, with 13 showing large effect sizes (Cohen’s d ≥ 0.80). These large differences were concentrated in distance measurements, postural reference points, spinal curve angles, and shoulder parameters. For example, mean trunk length VP–DM was 483.53 mm in men versus 445.13 mm in women, a difference of nearly 40 mm with an effect size of 1.40. Shoulder distance SL–SR showed an even larger gap, with men averaging 321.03 mm compared to 292.76 mm in women (Cohen’s d = 1.52). The authors suggest that sex-stratified reference values may be more appropriate for clinical interpretation, though they note that future studies should include height, weight, and BMI to determine whether these differences persist after anthropometric adjustment.

Age-related differences, by contrast, were predominantly trivial to small. Of the 27 parameters showing statistically significant differences across age groups, only three reached medium effect sizes (η² < 0.06). The most notable age-related pattern was an increase in thoracic kyphosis with age: the kyphotic angle ICT–ITL rose from 47.41° in participants aged 18–39 years to 54.94° in those aged ≥60 years, with a medium effect size. The flèche cervicale, a horizontal distance measure reflecting cervical sagittal posture, similarly increased from 55.91 mm to 71.20 mm across age groups. These findings align with a previous systematic review reporting an age-related increase in kyphotic angle, suggesting that sagittal spinal structure may be the domain most sensitive to aging.

The screening classification, based on DIERS-derived criteria for pelvic obliquity, vertebral rotation, and apical vertebral deviation, categorized 35.9% of participants as scoliotic posture, 5.8% as scoliosis risk, and 58.4% as unclassified. The proportion classified as scoliosis risk increased with age, from 4.3% in the youngest group to 8.1% in those aged ≥60 years, though the overall distribution did not differ significantly by sex or age. Notably, differences between screening categories were largely confined to parameters related to the classification criteria themselves, with only four parameters showing medium-to-large effects. Sagittal-plane parameters, such as lordotic angles, showed no significant between-group differences, suggesting that the DIERS screening classification primarily captures coronal and axial alterations rather than sagittal-plane changes.

The most methodologically innovative aspect of the study was the application of exploratory graph analysis (EGA), a network psychometric method borrowed from psychological research. Before EGA, unique variable analysis (UVA) removed 21 redundant parameters, retaining 24 non-redundant ones. EGA then identified a stable five-dimension structure, confirmed in 98.5% of 1,000 bootstrap iterations. The five dimensions were: trunk size and segmental length, coronal deviation and axial rotation, sagittal spinal structure and postural balance, upper-body angular asymmetry, and pelvic asymmetry. This dimensional structure suggests that upper body posture parameters may exhibit coordinated patterns of variation rather than changing independently across individual structures.

Dimension 3, the largest cluster with nine parameters, grouped sagittal spinal structure and postural balance together, implying that thoracic curvature, lumbar curvature, and overall sagittal balance may function as an interrelated multisegmented system. Dimension 2, comprising coronal deviation and axial rotation parameters, corresponds closely to the screening indicators used for scoliosis risk classification, suggesting a potential link between this dimension and scoliosis risk. Dimension 5, containing only pelvic torsion and pelvic obliquity, formed an independent pelvic-level assessment dimension. The authors propose that an individual parameter should not be interpreted in isolation but alongside other parameters within the same dimension, though the clinical validity of this dimension-based interpretation requires further evaluation.

The study’s limitations warrant consideration. The cross-sectional design and single-center health check-up population may not represent the broader adult population. Surface topography measurements are influenced by soft-tissue thickness, subcutaneous fat distribution, and body habits, but anthropometric data such as height and weight were not available, precluding assessment of their confounding effects. The screening categories were defined using DIERS-derived parameters without independent validation against radiographic Cobb angle, and should therefore be interpreted as screening signals rather than diagnostic evidence. Nevertheless, the absence of ionizing radiation makes raster stereography more feasible for frequent monitoring as a complement to radiography, particularly in screening pathways where individuals with suggestive findings could subsequently undergo radiographic assessment for diagnostic confirmation.

These findings provide a quantitative foundation for interpreting surface topography results in health management and scoliosis screening. The pronounced sex-related differences suggest that sex-stratified reference values should be adopted in clinical practice, while the five-dimensional structure indicates that future research should consider coordinated changes across multiple anatomical structures. As larger population datasets become available, machine-learning approaches may further improve the accuracy of spinal structure estimation from surface topography, potentially transforming how posture is assessed and monitored across the life course.

Subject of Research: Reference ranges and dimensional structure of upper body posture parameters in adults: a cross-sectional study

Article Title: Reference ranges and dimensional structure of upper body posture parameters in adults: a cross-sectional study

Article References: Yin, L., Ruan, C., Zhuang, X., Wu, L., Ni, X., Tao, J., & Chen, L. (2026). Reference ranges and dimensional structure of upper body posture parameters in adults: a cross-sectional study. Frontiers in Rehabilitation Sciences, 7, Article 1930857. https://doi.org/10.3389/fresc.2026.1930857

Image Credits: AI Generated

DOI: 10.3389/fresc.2026.1930857

Keywords: Reference, ranges, dimensional, structure, upper, body, posture, parameters, adults, cross-sectional, scientific research

In most four-legged mammals, the shoulder blade, or scapula, is the workhorse of the forelimb. Because terrestrial quadrupeds walk with their limbs held directly beneath their bodies, the ground reaction forces generated by each step travel up the limb in a roughly vertical direction and are absorbed primarily by the scapula, which is suspended in a sling of muscles and acts as the main interface between the limb and the trunk. The clavicle, the slender collarbone that braces the shoulder joint against the sternum, plays a comparatively minor structural role in many of these animals. This division of labor has long been considered the standard arrangement for mammals that move on land.

Moles, however, are anything but standard. Members of the family Talpidae have adopted a fossorial, or digging, lifestyle that places their forelimbs in a radically different orientation. Instead of being tucked under the body, the forelimbs are rotated outward and held wide of the torso, with the elbows facing upward and the hands turned to scoop soil sideways. This posture means that forces generated during digging and locomotion do not arrive at the shoulder girdle in the same vertical plane as they do in a walking shrew or mouse. Researchers have long suspected that this altered geometry must change which bones bear the load, but direct evidence from the internal structure of the bones themselves has been lacking.

That evidence has now been provided by Daichi Nakai of the Institute of Life and Environmental Sciences at the University of Tsukuba, in a study published in the Journal of Anatomy. Rather than looking only at the external shapes of bones, Nakai examined their internal architecture, the microscopic organization of bone tissue that reflects the mechanical stresses a bone experiences during life. Bone is a living, dynamic material: it is deposited and resorbed in response to the loads placed upon it, a principle known as bone functional adaptation. Dense, well-organized internal structure tends to develop in regions that routinely experience high stress, while lightly loaded bones remain more delicate. By reading these internal signatures, scientists can reconstruct how an animal actually used its skeleton, not merely how it looked.

The study compared two closely related species with very different lifestyles. The first was a mole from the family Talpidae, an accomplished burrower with the characteristic sprawled forelimb posture. The second was the Asian house shrew, Suncus murinus, a relative that lives above ground and walks with its forelimbs held beneath its body, in the conventional mammalian manner. Because the two species are closely related, differences in their bone structure can be attributed with reasonable confidence to their differing modes of locomotion rather than to distant ancestry. The comparison therefore functions as a natural experiment in how posture shapes skeletal mechanics.

The results were striking. In the mole, both the clavicle and the scapula were more robustly built than in the shrew, reflecting the sheer mechanical demands of a digging life. But the internal structure of the two bones told different stories. The mole’s clavicle displayed pronounced internal features indicating heavy, habitual loading, features that were absent from its scapula. In the shrew, the pattern was reversed: the scapula showed the stronger internal architecture, while the clavicle remained comparatively lightly built. In other words, the two species distribute mechanical stress across the shoulder girdle in opposite ways, and the difference tracks precisely with their posture.

This is the first histological evidence that the pathways of load transmission within the shoulder girdle have been reorganized during the evolution of the mole’s unique body plan. In the shrew, and by extension in typical terrestrial quadrupeds, ground forces pass mainly through the scapula on their way from the forelimb to the trunk. In the mole, the sprawled forelimb orientation appears to route a substantial share of those forces through the clavicle instead, which braces the shoulder against the sternum and channels loads toward the axial skeleton. The clavicle, often dismissed as a vestigial or minor element in many mammals, has become a primary load-bearing strut in these underground engineers.

The finding has implications that reach well beyond moles. The pectoral girdle of mammals is a complex assembly of bones whose individual roles have shifted repeatedly over hundreds of millions of years of evolution. Early synapsids, the ancestors of mammals, carried their limbs in a sprawled posture similar in some respects to that of moles, and the transition to upright, parasagittal locomotion is one of the defining events in mammalian history. If internal bone structure can reveal which elements carried the load in living species with known postures, the same analytical approach can be applied to fossils, offering a way to reconstruct how the functional roles of the scapula, clavicle, and coracoid changed as vertebrates moved from sprawling to upright gaits, and as different lineages took to the air, the trees, and the underground.

The method is powerful precisely because it does not depend on external anatomy alone. Two bones can look similar on the outside yet experience very different loading regimes, and traditional shape-based analyses can miss these functional distinctions. Histological sections reveal the density, orientation, and organization of the bone tissue itself, providing a record of the mechanical environment the bone experienced during the animal’s life. Applied comparatively, as in this study, the technique can distinguish between bones that are merely enlarged and bones that are genuinely re-tasked, a distinction that is central to understanding evolutionary transitions in biomechanics.

For moles, the study adds a new layer of appreciation for just how thoroughly evolution has remodeled their bodies for life in the dark. Every aspect of their skeleton, from the fused and shortened wrist bones that form their digging blades to the reinforced clavicle now shown to shoulder much of the mechanical burden, reflects millions of years of adaptation to the crushing resistance of soil. What appears at first glance to be a simple change in posture, elbows up and arms out, turns out to entail a deep reorganization of the internal architecture of the shoulder girdle itself. The research, supported by fellowships from the Japan Society for the Promotion of Science, demonstrates that even the most familiar bones can hold surprises when examined at the microscopic scale, and that the history of an animal’s lifestyle is written not only in the shapes of its bones but in their very substance.

Subject of Research: Posture-related load transmission in the pectoral girdle of burrowing moles

Article Title: Life underground shifted load transmission from the scapula to the clavicle in moles

Article References: Life underground shifted load transmission from the scapula to the clavicle in moles. (n.d.). Original publication

Image Credits: AI Generated

DOI: Not provided

Keywords: moles, Talpidae, clavicle, scapula, bone histology, load transmission, fossorial locomotion, shoulder girdle, biomechanics, posture, Journal of Anatomy, University of Tsukuba

The research team, led by Faten Ezzelarab Younis and colleagues in the Department of Public Health and Community Medicine, recruited all eligible full-time office workers performing desk-based administrative work at the faculty. Participants ranged in age from 26 to 59, with a mean age of 40.4 years, and nearly 59 percent were women. Most used computers in their daily work, with a median of 17.5 hours of computer use per week, and the median length of employment was twelve years. After applying inclusion and exclusion criteria, 230 workers were randomized equally into an intervention group and a control group, with 115 participants in each arm. Randomization was performed using a computer-generated list in which odd identification numbers went to the intervention group and even numbers to the control group.

The researchers measured outcomes using a validated knowledge, attitude, and practice questionnaire on office ergonomics, administered through face-to-face interviews in Arabic, the native language of all participants. The knowledge section contained ten questions covering the concept of ergonomics, symptoms and risk factors of musculoskeletal disorders, proper workstation setup, correct body posture, and preventive measures, scored on a four-point scale for a total ranging from 10 to 40. The attitude section included sixteen items rated on a five-point agreement scale, with total scores from 16 to 80, where lower scores indicated a more positive attitude. The practice component comprised five items about daily work habits such as twisting, bending, and repetitive tasks, scored so that higher totals reflected better practice. The questionnaire’s internal consistency was acceptable to good, with Cronbach’s alpha values of 0.67, 0.78, and 0.81 for the knowledge, attitude, and practice sections respectively.

The intervention itself was deliberately simple. Immediately after completing the baseline questionnaire, the intervention group attended a one-hour health education session delivered by the research team using a PowerPoint presentation with a computer and projector. The educational content, developed by the authors based on current ergonomic guidelines and relevant literature, covered the concept and importance of office ergonomics, risk factors and symptoms of musculoskeletal disorders, correct workstation setup, proper sitting posture, monitor, keyboard, and chair adjustment, the value of regular breaks and position changes, stretching exercises, and recommended ergonomic practices. Participants were encouraged to ask questions and discuss practical applications throughout the session. The control group received only the questionnaires, at baseline and again three months later, with no educational component in between.

Three months after the intervention, the differences between the groups were striking. The intervention group’s mean knowledge score rose from 30.6 at baseline to 37.2 at follow-up, while the control group remained essentially unchanged at 30.9. The attitude score of the trained group improved from 28.6 to 23.4, reflecting a more positive stance, whereas the control group’s score stayed near 28.3. Most notably, the practice score of the intervention group climbed from 10.4 to 17.0, while the control group’s practice score barely moved from 10.1 to 10.3. All between-group and within-group differences in the intervention arm were statistically significant, while the control group showed no meaningful change on any measure over the same period.

The trial also revealed a moderate but statistically significant positive correlation between knowledge and practice scores within the intervention group after follow-up, with a Pearson correlation coefficient of 0.469. No such correlation appeared in the control group, where the coefficient was a negligible 0.059. The authors interpret this as evidence that increased knowledge may contribute to improved ergonomic practices that help prevent repetitive strain injuries, though they caution that the moderate magnitude of the correlation indicates other factors, such as workplace culture, management support, and organizational commitment to ergonomics, likely also shape whether workers translate what they know into what they actually do at their desks.

Using binary logistic regression, the team identified several predictors of adequate knowledge and favorable practice within the intervention group. Younger workers were substantially more likely to achieve adequate knowledge and favorable practice, with adjusted odds ratios of 7.8 and 10.7 respectively. Higher education levels predicted both outcomes, with adjusted odds ratios of 8.9 for knowledge and 2.5 for practice. Computer use, long hours spent working on a computer, and shorter job duration were also significant predictors, with short work duration showing an adjusted odds ratio of 12.3 for favorable practice. Urban residence additionally predicted adequate knowledge. Interestingly, although attitude scores improved significantly after the intervention, none of the sociodemographic or occupational variables were significantly associated with a positive attitude in the adjusted model, which the authors attribute to the complex influence of beliefs, values, and motivation on attitudes rather than demographic traits alone.

The results align with a growing international body of evidence on ergonomic education. A cluster randomized trial in Nigeria previously showed that a one-day health education program improved the knowledge, attitudes, and workplace safety practices of 247 administrative staff at one and three months of follow-up. An Iranian study using lectures and posture training over eight weekly sessions demonstrated significant improvements in awareness, attitude, and practice among 180 office workers, and another Iranian intervention based on the Health Promotion Model improved workers’ ergonomic behavior. In the United States, research found that office workers’ ergonomics knowledge scores increased by nearly 30 percent after training, particularly when printed guidelines and follow-up email reminders helped workers modify their workspaces. Studies among multinational corporate employees have even found that a 40-minute lecture or a 10-minute live workstation demonstration can improve knowledge and change behavior.

The trial was not without limitations, and the authors are careful to frame their conclusions accordingly. The sample size was relatively modest, the three-month follow-up cannot establish whether the benefits persist over the long term, and the single-employment-site design may limit generalizability to workplaces with different organizational cultures, resources, or occupational health policies. Blinding was not feasible because participants and researchers necessarily knew who received the educational session. Thirteen participants withdrew during follow-up, leaving 217 in the final analysis, 108 in the intervention group and 109 in the control group. The study was retrospectively registered at the Pan African Clinical Trial Registry, a detail that trial methodology specialists typically weigh when interpreting randomized evidence.

Even with those caveats, the practical implications are considerable. The authors argue that incorporating health education on office ergonomics into workplace health promotion programs can improve workers’ well-being, productivity, and quality of life while lowering absenteeism and the associated economic burden. Organizations, they suggest, should provide regular ergonomics training sessions, promote appropriate workstation adjustments, encourage periodic breaks and stretching exercises, and integrate ergonomic education into occupational health and safety policies. Because older and less educated workers were less likely to benefit, the researchers call for future interventions to specifically target these higher-risk groups, and for studies with follow-up periods of six months to a year to determine whether a single hour of instruction can produce lasting change, or whether periodic refresher training is needed to keep healthy habits alive at the desk.

Subject of Research: Effect of a health education intervention on office ergonomics knowledge, attitude, and practice among office workers

Article Title: The impact of health education intervention on knowledge, attitude, and practice of office workers about office ergonomics: a randomized controlled trial

Article References: Younis, F. E., Abdelwanees, S., Abdel-Monaem, A. M., & Yaihya Abdel-Raouf, S. (2026). The impact of health education intervention on knowledge, attitude, and practice of office workers about office ergonomics: a randomized controlled trial. BMC Public Health, 26(1), Article 2847. https://doi.org/10.1186/s12889-026-29505-4

Image Credits: AI Generated

DOI: 10.1186/s12889-026-29505-4

Keywords: ergonomics, health education, office workers, musculoskeletal disorders, randomized controlled trial, occupational health, KAP questionnaire, workplace safety, posture, public health, Egypt, health promotion