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Higher intensity interval training improves aerobic capacity and metabolic profile in men with cardiac disease

Gratis

This study examined whether 12 weeks of higher intensity aerobic interval training plus progressive resistance training (HIIT+PRT) improved aerobic capacity, muscle strength, blood glucose and lipid profile in Phase 2 cardiac rehabilitation patients compared to standard care. Twenty-five men (65 ± 11 yr SD) participated in either HIIT+PRT (N=17, 3 x 5 min intervals at 65% predicted peak heart rate (HRpeak) alternated with 2 x 5 min intervals at 85%, plus 30 min PRT) or remained in standard care (CON N=8). The following measures were assessed at baseline and post-12 weeks: resting HR, blood pressure (BP), muscle strength, aerobic power, fasting blood glucose and cholesterol. The results show that HIIT+PRT significantly increased aerobic power (+24%), elapsed test time (+29%), abdominal muscular strength (+13%) and decreased systolic and diastolic BP (-7.7%, -5%), rate-pressure product (-14%), body mass (-2%), resting HR (-8%), fasting glucose (-7%), LDL (-36%) and triglycerides (-27%) compared to CON (P < 0.05). CON showed significantly increased triglycerides after 12 weeks. There were no adverse cardiac events in either group during or after the study. Conclusions: HIIT+PRT significantly improved aerobic capacity and clinical measures in stable Phase 2 CAD patients to a greater extent than standard rehabilitation exercise, and without adverse cardiac events.