Posture Assessment of Grade 1B Students of SDN Banyu Urip III with APECS Application
Keywords:
primary school, AI-based application, lower extremity, photogrammetryAbstract
The early period of primary school is a dynamic musculoskeletal transition phase and is prone to postural deviations due to motor factors and external loads. This descriptive study aims to evaluate the posture status of 22 students in grade 1B of SDN Banyu Urip III Surabaya quantitatively using the Alignment Posture Evaluation and Correction System (APECS) digital photogrammetry application. Frontal and sagittal field data were taken through a smartphone-integrated gyroscope, then analyzed with descriptive statistics on IBM SPSS v26.0 based on clinical asymmetry criteria. The results showed that postural misalignment was more pronounced in the lower extremities, with the highest deviation found in the variables Feet 4.95° (SD=3.873°) and Knees 3.32° (SD=3.957°) which were categorized as significant asymmetry. In contrast, the upper area showed lower deviations in the moderate to normal asymmetry range, including Body Alignment Side (2.77° ± 1.631°), Head Tilt (1.95° ± 2.081°), Pelvic Tilt (1.68° ± 1.217°), Shoulder Alignment (1.68° ± 1.211°), and Front Body Alignment (0.41° ± 0.666°). In conclusion, most students experience postural misalignment in the lower extremity segment and sagittal plane. However, there is a technical note in the form of potential visual occlusion in the leg area if anatomical markers are not accurately identified due to clothing intervention. Despite these limitations, the subject's posture control system is generally still capable of maintaining the stability of the central axis in the frontal plane. The use of the APECS application is still considered effective, safe, and non-invasive as an early detection instrument in schools, so preventive interventions such as ergonomic education are available.
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