[Construction and validation of a self-efficacy scale for physical activity].

Background: The estimation by standardized tests on belief in personal capacity to practice regular physical activity (self-efficacy for physical activity) allows us to make predictions about the actual practice of this behavior. We do not have measuring instruments suitable for this purpose, therefore, we propose to construct and validate a scale to determine levels of self-efficacy of adult users of the Primary Health Care Services for regular physical activity.

Methods: Phases: 1) Develop and review the scale by expert judges.

[Attentional neural networks impairment in healthy aging].

Introduction: Diverse evidences have shown that the process of natural aging causes a decline in different cognitive functions, including among them the attentional process.

Aim: To determine how the healthy aging affects to the different attentional networks.

Subjects And Methods: Two groups: young subjects (32.