All the sample will be randomized to performed 8 weeks of a specific sudden rest-exercise training and after 8 weeks will discontinue the protocol, or will do the opposite ( 8 weeks of no specific protocol, followed by 8 weeks of specific sudden rest-exercise training). The cardiac vagal will be evaluated at every 8 weeks to measure the cardiac vagal index between both phases. During all the time, all clients will perform aerobic, strength and flexibility exercises as part of the supervised exercise program.