We thank Denise Peterson and Hui-Ming Liu for their conscientious help in the diagnostic laboratory for these disorders. We are grateful to Jennifer Sullivan for editorial assistance and review of this manuscript. Research has been sponsored by National Institutes of Health Grants DK39078 and M01-RR30, the National Center for Research Resources, General Clinical Research Centers Program, a grant from the Muscular Dystrophy Association, and a generous contribution from the Duke GSD fund by E.B. Mandel, and Pompe Children Foundation.
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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.