Home-based Training and Supplementation in DM1 Patients

The present study will target patients (male and female) that have been clinically diagnosed with myotonic dystrophy type 1 with 100-1000 CTG repeats, between the ages of 19 - 60. In addition, a healthy population will serve as baseline controls, and they will be matched for age and sex, to the DM1 patients. A total of 40 DM1 patients and 20 healthy controls will be recruited. DM1 patients will be randomized to 20 in the active group and 20 in the placebo. Both males and females will be recruited, targeting 20 males and 20 females. Corresponding 10 healthy males and 10 healthy females will be matched for sex and age, and only participate in baseline visits, measures, and sample collection. Home-based concurrent training (HBCT) represents an exercise intervention with minimal barriers to entry. Our study will assess the effectiveness of this intervention, in combination with a multi-ingredient supplement (MIS) containing protein, creatine, antioxidants, and other dietary supplements in patients with DM1, in improving functional, clinical, and strength measures, as well as the quality of life, as assessed by scores in questionnaires. In addition, we will investigate adaptations to skeletal muscle following HBCT and MIS. A randomized clinical trial of DM1 patients. Our study will include exercise as the over-arching intervention, with two groups nested within, DM1 patients randomized to MIS and placebo, both of which will undergo 16 weeks of home-based exercise training. Measurements and samples will be collected before and after the study intervention. A third group will include age and sex-matched healthy controls. This group will not undergo training + supplement intervention and will be used for baseline comparisons between healthy participants and DM1 patients. Study procedures will include blood draws and muscle biopsies in each visit. In addition, participants will be asked to undergo a cardiorespiratory fitness test (VO2MAX test), a battery of functional tests (6-minute walk test, 5x sit-to-stand, one leg standing, 4-stair climb), strength testing (grip strength and knee extension tests) and lastly, clinical procedures, including ECGs and spirometry. Measurements and sample collection will be done before and after the study intervention.