Improvement in cardiac dysfunction with a novel circuit training method combining simultaneous aerobic-resistance exercises. A randomized trial

Abstract

IntroductionExercise is considered a valuable nonpharmacological intervention modality in cardiac rehabilitation (CR) programs in patients with ischemic heart disease. The effect of aerobic interval exercise combined with alternating sets of resistance training (super-circuit training, SCT) on cardiac patients' with reduced left ventricular function, post-myocardial infarction (MI) has not been thoroughly investigated.Aim of studyto improve cardiac function with a novel method of combined aerobic-resistance circuit training in a randomized control trial by way of comparing the effectiveness of continuous aerobic training (CAT) to SCT on mechanical cardiac function. Secondary to compare their effect on aerobic fitness, manual strength, and quality of life in men post MI. Finally, to evaluate the safety and feasibility of SCT.Methods29 men post-MI participants were randomly assigned to either 12-weeks of CAT (n = 15) or SCT (n = 14). Both groups, CAT and SCT exercised at 60%-70% and 75–85% of their heart rate reserve, respectively. The SCT group also engaged in intermittently combined resistance training. Primary outcome measure was echocardiography. Secondary outcome measures were aerobic fitness, strength, and quality of life (QoL). The effectiveness of the two training programs was examined via paired t-tests and Cohen's d effect size (ES).ResultsPost-training, only the SCT group presented significant changes in echocardiography (a reduction in E/e' and an increase in ejection fraction, P<0.05). Similarly, only the SCT group presented significant changes in aerobic fitness (an increase in maximal metabolic equivalent, P<0.05). In addition, SCT improvement in the physical component of QoL was greater than this observed in the CAT group. In both training programs, no adverse events were observed.ConclusionMen post-MI stand to benefit from both CAT and SCT. However, in comparison to CAT, as assessed by echocardiography, SCT may yield greater benefits to the left ventricle mechanical function as well as to the patient's aerobic fitness and physical QoL. Moreover, the SCT program was found to be feasible as well as safe.

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“…A recent randomized control trial evaluating standard continuous aerobic training to super‐circuit training, defined as aerobic interval exercise combined with alternating sets of resistance training, in postmyocardial infarction patients, concluded that this form of exercise yielded greater reductions in E / e ′ and an increase in ejection fraction. In addition, increased metabolic equivalents and physical component of quality of life were also greater in the super‐circuit training group …”

A szívbetegek rehabilitációjának sportos arca

“…A koreai szívelégtelen, 40% alatti ejekciós frakciójú betegek egy centrumban, nem random módon a kórházban 60%-os intenzitású edzésen vettek részt, míg mások otthonukban, fizioterapeuta vezetésével edzettek három hónapig. A kórházi csoport VO 2 -maximuma 19,4-ről 21,4-re nőtt, az otthon edzőké nem változott (18,(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)4). Egyéves követés során nem volt közöttük különbség a szíveseményekben [21].…”

“…Csak az SCT-edzés csökkentette az echokardiográfiás E/e-t és növelte az ejekciós frakciót és a VO 2max -ot, javította nagyobb mértékben az életminőséget. Jól viselték a betegek az SCT-edzést, biztonságosnak bizonyult [13].…”

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“…Regular exercise is an important method to prevent and treat cardiovascular disease 1,2,3,4,5,6 . Exercise lowers the risk of progression of vascular disease and significantly lowers the risk of cardiovascular morbidity and mortality 7,8,9,10 .…”