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Background: Socioeconomic characteristics of locations where physical activity equipment is installed may affect the activity level of users. The purpose of this study was to verify patterns of use and physical activity levels in fitness zones installed in low- and high-income neighborhoods in the city of Curitiba, Brazil. Methods: Over 1200 observations were conducted in 20 fitness zones in the city of Curitiba, Brazil. Data were collected during the months of November and December 2012, in 4 periods of the day (8 AM, 11 AM, 2 PM, and 5 PM), on 2 weekdays and 2 weekend days. Results: A total of 2232 people were observed in the fitness zones. Age group, level of physical activity in the area, use of fitness zones during weekend days, and occupation of spaces were significantly associated with neighborhood income. Moreover, users of fitness zones located in high-income neighborhoods showed higher odds ratio (OR = 1.74; 95% confidence interval, 1.46-2.07) of moderate to vigorous physical activity than light or sedentary activities, regardless of gender or day of the week. Conclusions: The sole presence of equipment does not seem to favor the use of fitness zones in low-income neighborhoods. Future studies should investigate intrinsic factors for the use of fitness zones for physical activity.

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RESUMO

El músculo elevador de la escápula ha sido descrito como un músculo plano conformado por fascículos que se originan en los procesos transversos de C1 a C4. Sin embargo, se han descrito variaciones anatómicas de este músculo, que incluyen a sus fascículos vertebrales, orígenes en la cabeza o terminando en músculos vecinos a su inserción usual. Durante la disección rutinaria de un cadáver formolizado de un individuo masculino, chileno, de 75 años de edad, observamos en su lado izquierdo, un fascículo accesorio del músculo elevador de la escápula, el cual tenía su origen en la vértebra C5 y terminaba en la fascia del músculo serrato anterior. En ambos lados el músculo elevador de la escápula provino de las vértebras C1-C4. El fascículo accesorio se originó desde el tubérculo posterior del proceso transverso de la quinta vértebra cervical, conformando un músculo que se dirigió medial e inferiormente, paralelo al músculo elevador de la escápula, para insertarse en la fascia del músculo serrato anterior, inferior a la inserción del músculo mencionado, en el ángulo superior de la escápula. Es importante comunicar las variaciones anatómicas para complementar el conocimiento de las mismas, las que pueden explicar ciertos trastornos físicos y dolorosos en la región cervico-escapular.

The levator scapulae muscle has been described as a flat muscle composed by fascicles originating from the transverse processes of C1 through C4. However, anatomical variations of this muscle are described, including its vertebral fascicles arising in the head or ending in neighboring muscles to the usual insertion. During routine dissection of a formolized cadaver of a 75 year-old Chilean male individual, we observed on the left side, an accessory fascicle of levator scapulae muscle, which had its origin in the C5 vertebra and ended at the serratus anterior muscle fascia. On both sides of the levator scapulae muscle came from C1­C4 vertebrae. The accessory muscular fascicle originated from the posterior tubercle of the transverse process of the fifth cervical vertebra, which runs medially and downward, parallel to the levator escapulae, and inserted to the serratus anterior muscle fascia, inferior to the insertion of the mentioned muscle, in the superior angle of the scapula. It is important to communicate anatomical variations to complement the knowledge of them, which may explain certain painful conditions in the cervico-scapular region.

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