Programming exercise intensity in patients on beta-blocker treatment: the importance of choosing an appropriate method
| Autor: | Rosa Sánchez Aquino, Koldo Villelabeitia Jaureguizar, Isabel Diaz-Buschmann, Maria José Calero |
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| Rok vydání: | 2013 |
| Předmět: |
Male
medicine.medical_specialty Time Factors Heart Diseases Epidemiology medicine.drug_class Adrenergic beta-Antagonists Physical Exertion Oxygen Consumption Heart Rate Predictive Value of Tests Internal medicine Heart rate medicine Humans Gas analysis In patient Beta blocker Aged Exercise Tolerance business.industry Reproducibility of Results Middle Aged Combined Modality Therapy Exercise Therapy Treatment Outcome Exercise Test Respiratory Mechanics Cardiology Exercise intensity Physical therapy Female Maximal exercise Cardiology and Cardiovascular Medicine Ventilatory threshold business Anaerobic exercise |
| Zdroj: | European Journal of Preventive Cardiology. 21:1474-1480 |
| ISSN: | 2047-4881 2047-4873 |
| DOI: | 10.1177/2047487313500214 |
| Popis: | To verify the usefulness of current recommended level of target exercise heart rate (HR) and of different HR-based methods for calculating target HR in patients with and without beta-blocker treatment.We studied 53 patients not treated with beta-blocker and 159 patients on beta-blocker treatment. All patients underwent a maximal exercise test with gas analysis, and first ventilatory threshold (VT1 or aerobic threshold), second ventilatory threshold (VT2 or anaerobic threshold), time of exercise, maximum load, metabolic parameters, HR at rest (HRrest), HRpeak, HR at VT1 (HRVT1) and at VT2 (HRVT2), and 75, 80, and 85% of HRmax (HR75%, HR80%, HR85%) were calculated. Exercise HR was also determined using the Karvonen formula, applying 60, 70, and 80% of the heart rate reserve (HRR) (HRKarv0.6, HRKarv0.7, and HRKarv0.8).This study included 102 patients on a beta-blocker and 39 not treated with negative cronotropic effect drugs. Maximum load, metabolic parameters, HRrest, HRpeak, HRVT1, and HRVT2 were significantly lower in patients on beta-blocker treatment. The proportion of patients with a HR75%, HR80%, HR85%, HRKarv0.6, HRKarv0.7, and HRKarv0.8VT1 andVT2 was very high and depended on whether patients were on beta-blocker treatment.Prescribed exercise intensity should be within VT1 and VT2, so that the efficacy and safety is guaranteed. If determining VT1 and VT2 is not possible, HR-based methods can be used, but with caution. In fact, there will be always a proportion of patients training below VT1 or above VT2. On the other hand, recommendations for patients on a beta-blocker should be different from patients not receiving a beta-blocker. Patients not treated with a beta-blocker should exercise at HRKarv0.7 or at HR85%. In patients on a beta-blocker, we recommend preferentially a target HR of HRKarv0.6 or HR80%. |
| Databáze: | OpenAIRE |
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