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박출률 감소 심부전 환자에서 리컴번트 사이클 운동의 안전성과 훈련 효과
송중섭(Jung-Sub Song),류호열(Ho-Youl Ryu),강석민(Seok-Min Kang) 대한심장호흡물리치료학회 2020 대한심장호흡물리치료학회지 Vol.8 No.1
Purpose : Higher levels of peak oxygen consumption and maximal aerobic capacity in patients with heart failure (HF) can lead to improvement of clinical outcomes such as morbidity and mortality. For this reason, cardiac rehabilitation (CR) should be applied to maximize HF patients’ aerobic capacity. However, several precautions are necessary due to unexpected cardiac adverse events in case of HF with reduced ejection fraction (HFrEF). The purpose of this study is to investigate the effect and safety of recumbent cycle exercise and regular training in order to apply a CR program for HFrEF patients. Methods : 72 HFrEF patients completed a cardiopulmonary exercise test and a knee extensor maximal voluntary isometric contraction (MVIC) and muscle power (MP) test at baseline. 12 HFrEF patients completed recumbent cycle exercise training (50 minutes, three times per week) for 24 sessions, followed by a post-test. Results : The study population consisted of 12 HFrEF patients (age 57.5± 10.8 years, all male). All subjects completed 24 training session without adverse events. Compared to baseline, the peak VO2 and six minute walking distance were significantly improved by 16% (p=0.003) and 18% (p<0.001) respectively. Knee extensor MVIC and MP weresignificantly improved by 18% (p=0.002) and 21% (p=0.012) respectively. Conclusion : Our study showed that recumbent cycle exercise could be an effective and safe exercise training method to increase aerobic capacity and leg muscle strength in HFrEF patients.
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남성 심부전 환자의 넙다리 네갈래근 근력이 최대 유산소 능력과 재입원에 미치는 영향
류호열(Ho-Youl Ryu),송중섭(Jung-Sub Song),최경욱(Kyoung-wook Choi) 대한심장호흡물리치료학회 2022 대한심장호흡물리치료학회지 Vol.10 No.1
Purpose: The cardiopulmonary exercise test (CPET) is widely used to evaluate the clinical prognosis in patients with heart failure (HF). However, some patients with HF cannot perform CPET at maximal exercise intensity because of unstable medical condition or musculoskeletal problems. Thus, the study aimed to investigate the effects of quadriceps maximal voluntary isometric contraction (Q-MVIC) strength on aerobic capacity and re-hospitalization (RH). Methods: Patients with HF (n = 60, 59.03 ± 13.4 years, male 100%) were recruited in this study. We evaluated the Q-MVIC strength and aerobic capacity after discharge from hospitalization and followed up the RH rate during home-based self-care periods. Results: The RH (n = 15, 64.00 ± 14.69) group showed significantly lower Q-MVIC strength (p = .028) than the no RH(NRH, n = 45, 57.78 ± 13.15) group. In addition, the RH group showed significantly lower peak VO2 (p < .001) than the NRH group. Moreover, the Q-MVIC strength and peak VO2 demonstrated significant correlation (r = .414, p < .001). Conclusion: Our study showed that the knee extensor strength has strong predictive values on aerobic capacity and RH rate in patients with HF.
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