Becker muscular dystrophy (BMD) is an X-linked recessive inherited disease with a worldwide incidence of 1 in 35,000 male births. Becker muscular dystrophy is characterized by progressive muscle wasting but is distinguished by delayed onset, later dependence on wheelchair support, and longer life span from Duchenne muscular dystrophy (DMD) that follows severe progressive muscle wasting.
Dystrophin, the gene defective in not only BMD but also DMD, was isolated in 1986. Since then, genetic diagnosis of BMD has been done leading to better understanding of the disease process, and the difference between DMD and BMD can be explained at the molecular level by the reading frame rule.
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The use of dumbbells gives you a much more comprehensive strengthening effect because the workout engages your stabilizer muscles, in addition to the muscle you may be pin-pointing. Without all of the belts and artificial stabilizers of a machine, you also engage your core muscles, which are your body's natural stabilizers.