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Purpose <p>While the dynamics of intra-abdominal pressure (IAP) during high-intensity resistance exercises are well-documented, its dynamics in trunk rotation remain unclear. We aimed to determine the dynamics of torque and IAP during trunk rotation torque exertion within an individual and the relationship between peak torque and various IAP values within a group.</p> Methods <p>Eighteen male participants aged 22.2 ± 1.2&#xa0;years, with a height of 170.5 ± 4.9&#xa0;cm and weight of 67.0 ± 6.9&#xa0;kg, demonstrated trunk rotation torque while IAP was measured, and the time-course dynamics and maximum values of both were measured. Maximum IAP values were also measured during the Valsalva maneuvers (VMs); IAP<sub>RMAX</sub> indicated IAP when maximum trunk rotation torque was recorded, and IAP<sub>VM</sub> indicated maximum IAP recorded during VM.</p> Results <p>In all participants, significant positive correlations with large effect sizes were found between trunk rotation torque and IAP time-course dynamics (<i>P</i> &lt; 0.01,<i> r</i><sub><i>s</i></sub> = 0.924), between maximum trunk rotation torque and IAP<sub>RMAX</sub> (<i>P</i> &lt; 0.01, <i>r</i> = 0.594), and between maximum trunk rotation torque and IAP<sub>VM</sub> (<i>P</i> &lt; 0.05, <i>r</i> = 0.542).</p> Conclusion <p>We found that the time-course dynamics of torque and IAP during trunk rotation torque exertion were nearly synchronized. Furthermore, the higher the peak torque value, the higher the IAP<sub>RMAX</sub> and IAP<sub>VM</sub> values tended to be. These results indicate that IAP is strongly implicated during trunk rotator muscle effort.</p>

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Investigation of intra-abdominal pressure dynamics during trunk rotator efforts in healthy young men

  • 期刊论文

  • 发表日期：

    2025年2月15日

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  • Asuka Kimura,
  • Taisei Hakozaki,
  • Youhei Yasuda,
  • Takuya Shimizu

摘要

Purpose

While the dynamics of intra-abdominal pressure (IAP) during high-intensity resistance exercises are well-documented, its dynamics in trunk rotation remain unclear. We aimed to determine the dynamics of torque and IAP during trunk rotation torque exertion within an individual and the relationship between peak torque and various IAP values within a group.

Methods

Eighteen male participants aged 22.2 ± 1.2 years, with a height of 170.5 ± 4.9 cm and weight of 67.0 ± 6.9 kg, demonstrated trunk rotation torque while IAP was measured, and the time-course dynamics and maximum values of both were measured. Maximum IAP values were also measured during the Valsalva maneuvers (VMs); IAPRMAX indicated IAP when maximum trunk rotation torque was recorded, and IAPVM indicated maximum IAP recorded during VM.

Results

In all participants, significant positive correlations with large effect sizes were found between trunk rotation torque and IAP time-course dynamics (P < 0.01, rs = 0.924), between maximum trunk rotation torque and IAPRMAX (P < 0.01, r = 0.594), and between maximum trunk rotation torque and IAPVM (P < 0.05, r = 0.542).

Conclusion

We found that the time-course dynamics of torque and IAP during trunk rotation torque exertion were nearly synchronized. Furthermore, the higher the peak torque value, the higher the IAPRMAX and IAPVM values tended to be. These results indicate that IAP is strongly implicated during trunk rotator muscle effort.