Effect of acute exercise performed in rectangular load and the maximum voluntary exhaustion in markers of well being: an additional study of exercise dependence

• Grant number: 09/07823-7
• Support Opportunities: Scholarships in Brazil - Master
• Start date: September 01, 2009
• End date: February 28, 2011
• Field of knowledge: Health Sciences - Physical Education
• Principal Investigator: Marco Túlio de Mello
• Grantee: Vladimir Bonilha Modolo
• Host Institution: Escola Paulista de Medicina (EPM). Universidade Federal de São Paulo (UNIFESP). Campus São Paulo. São Paulo , SP, Brazil

Abstract

Several studies report a positive relation between affective measures and exercise, and this relationship offers a range of questions about the magnitude of this feelings and what substances would be released to respond to well-being. The comprehension about this relation is important because would be possible identify possible markers related with exercise dependency phenomenon. Thus, the aim of this study is to investigate the effects of acute exercise in different intensities on well-being, observing the behavior of possible biochemical mediators that may be related to exercise dependence. For this, 20 health male volunteers with age between 18 to 45 years will be recruiting. The volunteers will be distribute in two groups: a) Exercise Dependents (10) and b) Non exercise-dependents (10), and submitted to the following exercise protocols conduced in a ergometric treadmill: a) Ergoespirometric Test until maximal voluntary exhaustion; b) Ergoespirometric Test in rectangular load on ventilatory threshold 1 intensity for 30 minutes, c) Ergoespirometric Test in rectangular load on ventilatory threshold 1 intensity for 30 minutes. The volunteers answer questionnaires to assess the humor and aspects of well-being, in the following moments of each protocol: Basal, immediately after, 30 'and 60' Post exercise. In addition, the volunteers are submitted a puncture of peripheral forearm vein for collection of sample to levels of: IL-6; B-endorphin, cortisol, testosterone, lactate, BDNF and anandamide.