Background: Mechanical low back pain (MLBP) is a leading cause of disability worldwide, with well-established risk factors such as obesity, occupational ergonomics, and core muscle strength. However, the role of pes planus (flat foot) as a contributing factor remains underrecognized. This study aims to investigate the association between flat foot and MLBP using Clarke’s angle as an objective measure of foot posture. Methods: A case-control study was conducted in South Timor Tengah Regency, East Nusa Tenggara, Indonesia, from December 2024 to February 2025. Fifty patients diagnosed with MLBP and 50 healthy controls were enrolled. Foot type assessment was performed using Clarke’s angle, with a cutoff of ≤30° indicating flat foot. Pain severity in the LBP group was recorded using the Numerical Rating Scale (NRS). Statistical analysis was conducted using chi-square and independent t-tests, with significance set at p < 0.05. Results: Flat foot was significantly more prevalent in the LBP group (58%) than in the control group (18%) (p = 0.000; OR: 6.29, 95% CI: 2.52-15.69), indicating that individuals with flat feet are over six times more likely to experience MLBP. No significant differences were observed between the groups regarding BMI, age, or gender. Conclusion: These findings suggest that flat foot is an independent risk factor for MLBP, likely due to altered spinal biomechanics and compensatory postural changes. Clinicians should consider foot posture assessments in MLBP patients and explore targeted interventions, such as orthotic support, to mitigate symptoms.

This review article provides a comprehensive anatomical analysis of soccer footwear, delving into the intricate structure and functional roles of its constituent components, including the upper, heel counter, tongue, toe box, outsole/sole plate, studs, and insole. Manufacturing processes influencing these structural elements are also discussed. Current market offerings and patented innovations in soccer cleat technology are examined through a biomechanical lens, highlighting their intended functions and limitations. A critical synthesis of existing knowledge underscores the anatomical and biomechanical distinctions between male and female athletes' feet, arguing for the necessity of sex-specific footwear design. This review culminates in emphasizing the imperative for specifically engineered soccer footwear for female athletes to optimize performance, enhance comfort, and mitigate the elevated risk of lower extremity injuries prevalent in the female game, thereby identifying crucial directions for future research in sports biomechanics and footwear engineering.

This systematic review aimed to evaluate the biomechanical properties, functional performance, and clinical outcomes of different hip prosthesis materials and designs used in total hip arthroplasty (THA). A comprehensive search strategy identified 34 peer-reviewed studies published between 2015 and 2024. The materials investigated included cobalt-chromium-molybdenum (CoCrMo), titanium alloys, PEEK, ceramics, and advanced surface coatings such as polycrystalline diamond (PCD). In addition, dual mobility systems, lattice structures, and additively manufactured and patient-specific implants were assessed. The studies utilized clinical trials, finite element analysis, and biomechanical testing to compare outcomes such as wear resistance, stress distribution, osseointegration, and range of motion. The findings demonstrated that titanium alloys and porous lattice structures reduce stress shielding, while ceramics and CoCrMo provide superior wear resistance. Dual mobility implants improved joint stability and range of motion, particularly in high-risk patients. PEEK and PCD showed promising properties but lacked robust long-term data. The integration of advanced manufacturing technologies and material innovations has led to more personalized and biomechanically efficient solutions for THA. Further longitudinal studies are needed to validate these developments. This review provides a critical synthesis of the biomechanical, functional, and clinical implications of contemporary hip prosthetic systems.

This exploratory review article synthesizes existing literature on the evolution and increasing significance of women's soccer, particularly in the United States. While acknowledging the sport's progress and the achievements of the U.S. Women's National Team (USWNT), it critically examines two key challenges that impede further advancement: the alarmingly high incidence of knee injuries among female players and the persistent underrepresentation of Black women. The review highlights the biomechanical factors contributing to these issues, emphasizing the need for footwear designed to accommodate the specific anatomical and functional requirements of female athletes. Furthermore, it explores the systemic barriers that contribute to the lack of diversity within the sport, advocating for equitable opportunities and support for Black women. This review concludes by underscoring the necessity for innovative, interdisciplinary approaches to ensure the continued growth and well-being of all participants in women's soccer, and identifies critical areas for future research in kinesiology and related fields.

The anterior collateral ligament (ACL) is one of four ligaments in the knee, connecting the tibia and femur and acting as a key stabilizer. Factors influencing these injuries include playing surface, training programs, athlete strength, technique, and gender. Female athletes are at a higher risk of ACL injuries, being four to nine times more likely than males, often due to differences in biomechanics and training patterns. It ss important that rehab focuses on both legs, as overworking the injured leg increases the risk of injuries elsewhere. Prevention training, such as proprioceptive-balance and plyometric agility training, has been shown effectiveness in minimizing ACL injuries. Despite some limitations in research, these programs highlight the importance of improved training techniques. Kinesio taping might help reduce pain but lacks strong evidence for preventing ACL tears.

For the adequate treatment of bone fractures, it is necessary to have knowledge about mechanical concepts as the interaction of implants and bone. The understanding of the concept of stress riser must be clear for surgeon for adequate surgical planning, thus preventing refracture due to incorrect application of implants. This article presents the concept of stress riser applied to orthopedics and briefly discussion.