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Objective <p>Atherosclerotic cardiovascular disease (ASCVD) progresses silently, highlighting the importance of early prevention. This pilot study aimed to examine the relationship between thermal habits—specifically hot-tub bathing—and biomarkers of chronic inflammation, as well as arterial stiffness in young adults.</p> Results <p>Twenty-five participants were included: 9 males (mean age: 21.78 ± 2.05&#xa0;years) and 16 females (mean age: 21.0 ± 0.97&#xa0;years). We assessed hot bathing habits and measured plasma interleukin-6 (IL-6), high-sensitivity C-reactive protein (hsCRP), heat shock protein 70 (HSP70), and brachial-ankle pulse wave velocity (baPWV). IL-6 levels were significantly lower among habitual hot-tub bathers (p = 0.04 overall; p = 0.018 in females). In females, hsCRP tended to be lower with immersion bathing (p = 0.08). No significant differences were observed in hsCRP, HSP70, or baPWV in the overall, male, or female groups. In females, IL-6 negatively correlated with ABI (ρ = −0.543, p = 0.03), and baPWV negatively correlated with bathing duration (ρ = −0.562, p = 0.045). These findings suggest that habitual hot-tub bathing, a culturally embedded and easily implemented habit in Japan, may serve as a lifestyle intervention to reduce inflammation and support ASCVD prevention in young adults.</p>

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A pilot study on the relationship between thermal habits, chronic inflammation, and arterial stiffness in young adults

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年4月14日

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  • Masayo Nagai,
  • Akiko Tanaka

摘要

Objective

Atherosclerotic cardiovascular disease (ASCVD) progresses silently, highlighting the importance of early prevention. This pilot study aimed to examine the relationship between thermal habits—specifically hot-tub bathing—and biomarkers of chronic inflammation, as well as arterial stiffness in young adults.

Results

Twenty-five participants were included: 9 males (mean age: 21.78 ± 2.05 years) and 16 females (mean age: 21.0 ± 0.97 years). We assessed hot bathing habits and measured plasma interleukin-6 (IL-6), high-sensitivity C-reactive protein (hsCRP), heat shock protein 70 (HSP70), and brachial-ankle pulse wave velocity (baPWV). IL-6 levels were significantly lower among habitual hot-tub bathers (p = 0.04 overall; p = 0.018 in females). In females, hsCRP tended to be lower with immersion bathing (p = 0.08). No significant differences were observed in hsCRP, HSP70, or baPWV in the overall, male, or female groups. In females, IL-6 negatively correlated with ABI (ρ = −0.543, p = 0.03), and baPWV negatively correlated with bathing duration (ρ = −0.562, p = 0.045). These findings suggest that habitual hot-tub bathing, a culturally embedded and easily implemented habit in Japan, may serve as a lifestyle intervention to reduce inflammation and support ASCVD prevention in young adults.