김성대1, 이상희2, 이희혁1, 정일규1

1한남대학교 스포츠과학과, 2포항세명기독병원 순환기내과

Background: The purpose of this study is to investigate the
safety and efficiency of recumbent bicycle ergo-
meter exercise by observing heart rate variability (HRV) and
hemodynamic variables in patients with atrial fibrillation.
Methods: In a balanced crossover study, 13 patients with
atrial fibrillation (mean age, 62.2±5.3 years) were
asked to perform a bicycle exercise twice, once in the
upright position and once in the recumbent position at an
angle of 30°, with a 1-week interval between both. The
exercise intensity was set initially at 10 W and increased by
15 W every 2 minutes up to 70 W. HRV and hemodynamic
variables were measured. All data were analyzed using
one-way repeated-measures analysis of variance.
Results: Low-frequency normalization in HRV was
increased with no intergroup differences immediately after
exercise. The rate pressure product was significantly lower
in the recumbent than in the upright position right af- ter
exercise (104.8±14.3 vs. 151.8±51.4 mmHg×beats/min×10-
2, P<0.01).
Conclusions: Recumbent exercise improves the safety and
efficiency of cardiac rehabilitation for atrial fi-
brillation patients by reducing myocardial workload without
compromising the activation of the autonomic nerv- ous
system that regulates cardiac activity.
Korean J Health Promot 2019;19(4):248-254
Keywords: Posture, Exercise, Atrial fibrillation,
Hemodynamics