Sinus arrhythmia is a relatively common type of arrhythmia in clinical practice. It is typically identified through electrocardiogram testing. If no other specific symptoms are present other than sinus arrhythmia, sinus bradycardia, or sinus tachycardia, and if there is no structural heart disease, generally, there are no serious concerns. Often, these kinds of arrhythmias are caused by autonomic nervous system dysfunction, leading to an imbalance between the sympathetic and parasympathetic nerves. To address this irregular heartbeat, it is advisable to rest adequately in daily life and to include some aerobic exercise. Exercise can enhance cardiac contractility and strengthen regular heart function, which can help correct the arrhythmia.