Daily physical activity impact in old women bone density and grip strength.

INTRODUCTION: Being physically active is related to a better physical functioning in older people, but daily physical activity impact in specific outcomes such as osteoporosis or sarcopenia is still not clear. OBJECTIVE: The main objective of this study is to determine the impact of daily physical activity (DPA) in the bone mineral density and grip strength of old women. The secondary objective is to distinguish between weekday and weekend day scores. METHODS: Forty-two women between 65 and 79 years participated. DPA was monitored with the accelerometer ActiGraph GT3X (Pensacola, FL, USA) placed on the dominant hand wrist. Bone mineral density was measured with dual-energy X-ray absorptiometry (AccuDEXA, SHICK, USA) in the central finger of the dominant hand; and grip strength, with a Takei dynamometer (TKK 5001). RESULTS: There were statistical differences between moderate and vigorous DPA in age, T-score, physical activity counts/min and min/day, and grip strength. Weekend minutes correlated significantly with all the variables. Age was a confounding factor. CONCLUSIONS: Higher DPA intensities accomplished by our old women sample preserve T-score (bone standard deviations respect to young, healthy people) and grip strength in a normal range. These results are strongly influenced by weekend scores. Age should be controlled by shorter ranks.

Daily physical activity impact in old women bone density and grip strength / Impacto de la actividad física diaria en la densidad ósea y la prensión manual de mujeres mayores

Introduction: Being physically active is related to a better physical functioning in older people, but daily physical activity impact in specific outcomes such as osteoporosis or sarcopenia is still not clear. Objective: The main objective of this study is to determine the impact of daily physical activity (DPA) in the bone mineral density and grip strength of old women. The secondary objective is to distinguish between weekday and weekend day scores. Methods: Forty-two women between 65 and 79 years participated. DPA was monitored with the accelerometer ActiGraph GT3X (Pensacola, FL, USA) placed on the dominant hand wrist. Bone mineral density was measured with dual-energy X-ray absorptiometry (AccuDEXA, SHICK, USA) in the central finger of the dominant hand; and grip strength, with a Takei dynamometer (TKK 5001). Results: There were statistical differences between moderate and vigorous DPA in age, T-score, physical activity counts/min and min/day, and grip strength. Weekend minutes correlated significantly with all the variables. Age was a confounding factor. Conclusions: Higher DPA intensities accomplished by our old women sample preserve T-score (bone standard deviations respect to young, healthy people) and grip strength in a normal range. These results are strongly influenced by weekend scores. Age should be controlled by shorter ranks (AU)

Introducción: mantenerse físicamente activo se relaciona con la funcionalidad en las personas mayores, pero el impacto de la actividad física diaria en alteraciones como la osteoporosis o la sarcopenia no está claro. Objetivo: el principal objetivo es determinar el impacto de la actividad física diaria (AFD) en la densidad ósea y la fuerza de prensión manual de mujeres mayores. El objetivo secundario es distinguir entre los datos de los días de diario y los fines de semana. Métodos: participaron 42 mujeres de entre 65 y 79 años. La AFD se monitorizó con el acelerómetro ActiGraph GT3X (Pensacola, FL, USA) situado en la muñeca de la mano dominante. La densidad de masa ósea se midió mediante absorciometría dual de rayos X (AccuDEXA, SHICK, USA) en el dedo central de la mano dominante; y la fuerza de prensión manual, con el dinamómetro Takei (TKK 5001). Resultados: se encontraron diferencias significativas entre los grupos AFD de intensidad moderada y vigorosa en la edad, el T-score, los counts/min y los min/día de AFD, y la fuerza de prensión manual. Los minutos de AFD realizados los fines de semana correlacionaron significativamente con todas las variables. La edad es un factor de confusión. Conclusiones: una mayor intensidad de AFD alcanzada por nuestra muestra de mujeres mayores preserva los valores de T-score (desviaciones estándar óseas respecto a personas jóvenes y sanas) y fuerza manual en un rango normal. Estos resultados están fuertemente influenciados por los valores alcanzados los fines de semana. La edad debería ser controlada (AU)