Functional capacity and risk of injury in CrossFit practitioners measured through smartphone apps.

BACKGROUND: CrossFit is a high intensity functional training that tends to challenge physical limits. The objectives of this study were to assess functional capacity, prevalence and risk of injury in CrossFit practitioners. METHODS: This cross-sectional, observational and prospective study evaluate the rate of injuries that occurred in CrossFit practitioners in the last 12 months and their functional capacities. The sample was given for convenience, with a total of 22 participants. Functional capacities and risk of injury were measured by functional tests using PHAST and Clinometer applications. The prevalence of injuries was cataloged using the Nordic Musculoskeletal Questionnaire. RESULTS: 5% of the injuries occurred in the neck; 9% in shoulder, hip, thighs, ankles and feet; 14% in the lumbar spine and knees. The worst functional results were for the shoulder medial rotation ROM test, where 86-95% of the athletes were classified as "Bad"; the dorsiflexion ROM test also performed poorly in 68% of athletes. CONCLUSION: This study shows that the CrossFit practice suggests that the injury prevalence is relatively low, affecting mainly knees, lumbar spine, wrists and hands. However, the risk of injuries shown by the functional musculoskeletal assessment is higher, especially in the shoulder and ankle, and it is important for the practitioner to realize a specific functional assessment before starting training.

Anomalous bilateral contribution of extensor pollicis longus and muscle fusion of the first compartment of the wrist.

Knowledge of the anatomical variations of the muscles of the first dorsal compartments of the wrist is clinically relevant to De Quervain's tenosynovitis and to reconstructive surgeries. In the literature, there are many reports of the presence of multiple insertion tendons in the first dorsal compartment of the wrist, but few reports describe occurrences of fusion and muscle contributions. This case report describes an anomalous bilateral contribution of the extensor pollicis longus. This anomalous contribution was found through a slender auxiliary tendon that crossed laterally under the extensor retinaculum, entered the first dorsal compartment of the wrist and merged with the tendon of the extensor pollicis brevis muscle. In the same cadaver in which this contribution was present, there was atypical muscle fusion of the abductor pollicis longus muscle and extensor pollicis brevis muscle. In conclusion, anomalous bilateral contribution of the extensor pollicis longus muscle and atypical muscle fusion, concomitant with a variant insertion pattern, are the highlight of this case report. Furthermore, it is concluded that additional tendons may be effectively used in reconstructive surgeries, but that there is a need for knowledge of the possible numerical and positional variations of these tendons, with a view to making more effective surgical plans.

O conhecimento das variações anatômicas dos músculos do primeiro compartimento dorsal do punho é clinicamente relevante na tenossinovite de De Quervain e nas cirurgias reconstrutivas. Na literatura encontram-se inúmeros relatos da presença de múltiplos tendões de inserção no primeiro compartimento dorsal do punho, mas são poucos os relatos que descrevem a ocorrência de fusão e de contribuições musculares. Este relato de caso descreve uma contribuição anômala bilateral do extensor longo do polegar. A anômala contribuição foi encontrada por um tendão auxiliar delgado que cruzou lateralmente sob o retináculo dos extensores, entrou no primeiro compartimento dorsal do punho e fundiu-se com o tendão do músculo extensor curto do polegar. No mesmo cadáver foi encontrada a presença dessa contribuição e uma fusão muscular atípica do músculo abdutor longo do polegar (APL) com o extensor curto do polegar (EPB). Em conclusão, a anômala contribuição bilateral do músculo extensor longo do polegar e a fusão muscular atípica, concomitante com um padrão de inserção variante, é o destaque deste relato de caso. Ainda, conclui que os tendões adicionais podem ser efetivamente usados nas cirurgias reconstrutivas e alerta sobre a necessidade de conhecimento das possíveis variações numéricas e posicionais desses tendões, com vistas a planejamentos cirúrgicos mais eficazes.

What is the influence of surgical treatment of adolescent idiopathic scoliosis on postural control?

PURPOSE: To evaluate the effect of surgical treatment on the control of upright balance in adolescent idiopathic scoliosis (AIS). METHODS: Thirty adolescents were divided into two groups: Group C (n=15) consisted of individuals without scoliosis (control), and Group S (n=15) consisted of individuals with scoliosis. The mean amplitude and velocity of the center of pressure (COP) evaluations in the anterior-posterior and medial-lateral directions were obtained before surgery and at 7, 30, 60 and 90-days after surgery, in an upright position, using a force platform. RESULTS: Group S showed larger oscillation than Group C before surgery. The COP oscillation in Group S after surgery was larger than that in the pre-surgery period. The oscillation diminished over the post-surgery period, but individuals in the 90-day post-surgery period still had larger oscillation compared with the oscillation in the pre-surgery period. CONCLUSION: Group S had larger AP and ML mean amplitude and mean velocity before and after surgery compared with Group C, which suggests that a sensorimotor impairment or sensory integration problem could explain the balance control alterations more than biomechanical factors in the AIS.