Influence of Dynamic Foot Exercise and a Warm-water Footbath on Arterial Distensibility / 日本温泉気候物理医学会雑誌

ABSTRACT

<b>Introduction:</b> Prevention of the onset of cardio/cerebrovascular diseases, which represent circulatory system diseases, is now emphasized. It requires ensuring good arterial distensibility, which has been demonstrated to be reduced by life environments such as the lack of exercise or overnutrition but improved by aerobic exercise. Even if implementation of such exercises is possible, it increases the risks of the frail elderly with declined cardiopulmonary function and those with other diseases. This study aimed to focus on plantar flexion and dorsiflexion exercises of the ankles as a type of effective, low-load exercise that can induce dynamic stimulation associated with increased blood flow, using muscle pumping of the triceps surae and footbath, which could potentially increase overall blood flow via hyperthermic action. We then investigate the benefits of the combined effects of these two exercises on arterial distensibility.<BR><b>Methods:</b> We selected 25 physically and mentally healthy adult men and women (17 men and eight women; mean ± SD age, 25.7 ± 3.3 years) as study subjects.<BR>  All the 25 subjects performed each of three exercises, namely footbath, ankle exercise, and ankle exercise in footbath, in a sitting position for 15 minutes. Ankle-brachial index (ABI), brachial-ankle pulse wave velocity (PWV), systolic blood pressure, diastolic blood pressure, and heart rate were measured using form PWV/ABI before and after the exercise for the evaluation of arterial distensibility.<BR><b>Results:</b> No significant differences were observed in the PWVs, ABIs, systolic/diastolic blood pressures, and heart rates before and after exercise in the footbath and exercise groups. However, for the footbath exercise group, a significant reduction in PWV was observed from before to after exercise.<BR><b>Discussion:</b> In this study, we focused our attention on the ankle exercise in footbath as a low-load exercise that could improve arterial distensibility. The results indicated a significant reduction in PWV, an index used to show the level of arterial distensibility, only for the footbath exercise group, which performed the combination of ankle exercise and footbath.We can infer that the improvement of arterial distensibility is attributed to the synergistic effect of the muscle pump and hyperthermic actions, which result in further increases and facilitation of cardiac output.<BR><b>Conclusions:</b> This study demonstrated that the ankle exercise in footbath was beneficial for the improvement of arterial distensibility.