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Background. The quantitative examination of bone tissue is primarily associated with the diagnosis of osteoporosis. Osteoporosis is rarely suspected among athletes, usually young, active, and generally healthy. Quantitative research of bone tissue related to the sport has a preventive dimension. Increasing the parameters of bone tissue strength, especially reaching the maximum value of peak bone strength in childhood, adolescence, and early adulthood due to practicing sports can contribute to maintaining bone health throughout life. The study was designed to review and narratively analyze the impact of sports activity on bone mass using quantitative ultrasound bone assessment. Material and methods. Extensive electronic research has been conducted to identify scientific papers using ultrasonic methods to evaluate bones in sports. The study was conducted using the PRISMA method (Preferred Reporting Items for Systematic Review and Meta-Analyses). Searching and downloading articles were done electronically. The narrative strategy of the review was implemented step by step. Results. Five hundred and twenty-nine results were identified. After reading the full texts, there are 12 articles left. Relevant articles were found in the references of selected articles and added to the analysis. Selected articles were selected to be presented in the results, and the rest were used for discussion. Higher bone density and strength are often found in active sporting groups compared to non-athlete peer groups. The influence of physical activity is observed, especially in strength or strength sports of both sexes. Football, dance, and martial arts such as karate and tai chi practice positively affect bone tissue. Such an impact is not noted in disciplines such as swimming and cycling. Conclusions. Systematic and long-term sports behaviors affect not only the improvement of the condition of bone tissue but also the long-term maintenance of the achieved improvement in the condition of the skeleton. It remains open to determine which sports disciplines lead to the most noticeable improvement in the condition of the ultrasound-examined bone. Further studies using non-invasive methods of bone quantification are needed to determine the specific conditions for the prevention of osteoporosis through physical activity and sport, in particular, the duration of the activity, the size of loads, and other factors related to practicing sports.

Introduction: Exercise-based approaches exist; however, it is unclear whether these approaches are based on scientific findings in the literature on trunk muscle deficits in scoliosis that could be targeted by exercises. The aims of this study were to systematically review the literature to understand the functional muscular properties of paraspinal muscles in AIS to determine: 1) differences in functional outcomes between patients with AIS and controls, 2) differences in functional outcomes between sides (concave and convex) in patients compared to controls 3) differences between concave and convex sides as well as levels in subjects with AIS, 4) differences in functional outcomes between different curve types. 5) Associations between functional outcomes and curve characteristics, and 6) associations between functional characteristics and progression. Design: Systematic review Methods: A search was conducted in EMBASE, MEDLINE, SPORTdiscus, CINAHL, SCOPUS, and Web of Science, for keywords describing functional properties of paraspinal muscles and measurement tools including: scoliosis, spinal deformity, spinal muscles, erector, rotatores, longissimus, spinalis, illiocostalis, force, strength, endurance, fatigability, and muscle fatigue. Two reviewers independently reviewed abstracts and then full-text articles to determine if they met selection criteria. Two reviewers used an extraction form to extract information and appraise the quality during the full-text review. Levels of evidence were determined for summarized results for each of the 6 objectives. Results: Our search yielded 316 unique records. Inter-reviewer agreement for abstract selection was Kappa = 0.73 and was 0.77 for full-text inclusion. Full-text review was done for 48 papers and 24 were included. A large amount of heterogeneity was observed in sample studied and assessment methodology. Quality appraisal revealed that no study met a minimum of 50 % of the relevant quality criteria. Studies recruited consistently low sample sizes and samples were largely heterogeneous. Limited evidence was noted supporting, a prolonged bilateral EMG activation during gait between AIS and controls; elevated heterolateral:homolateral activity ratios during side-bending; overall weakness in those with scoliosis compared to controls; no asymmetry in normalized muscle activity during submaximal isometric contractions; prolonged latencies on the side of the spine opposite of the curve and bilaterally in response to an unloading reflex; strength & muscle volume differences are most commonly pronounced in double curves; Axial rotation of the UEV is correlated with a high convex:concave activity ratio at the LEV; no correlation between latency and curve severity, but a correlation between latency and progression and higher convex:concave EMG ratios and progression, this is more pronounced in sitting positions. Conclusions: Evidence is limited on most of our six objectives due to low quality evidence and lack of research about muscle impairments in scoliosis. Current exerci...