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Purpose <p>To explore acute changes in laboratory-based indices of experimental pain modulation in women with fibromyalgia following two exercise modalities (strength training vs. walking) during the first and fourth weeks of an exercise program.</p> Methods <p>This exploratory quasi-experimental study employed a repeated measures design and was conducted as a secondary analysis of a registered clinical trial. Women diagnosed with fibromyalgia were allocated to either a walking or a strength training group. The walking group performed moderate-intensity treadmill walking (60–70% of estimated maximum heart rate) for 40&#xa0;min, while the strength training group completed moderate-intensity resistance exercises prescribed at 50% of one-repetition maximum, determined using the 1-RM test. Laboratory-based measures of experimental pain sensitivity and endogenous pain modulation—including pressure pain thresholds, temporal summation, and conditioned pain modulation—were assessed before and after exercise sessions in the first and fourth weeks.</p> Results <p>18 women with fibromyalgia and comparable baseline characteristics were evaluated. Between-group and within-group comparisons across time revealed no statistically detectable differences in experimental pain sensitivity or endogenous pain modulation indices (<i>p</i> ≥ .05). Observed changes were small and accompanied by wide confidence intervals, reflecting substantial interindividual variability and the absence of consistent acute exercise-related patterns.</p> Conclusion <p>Neither walking nor strength training produced statistically detectable differences in laboratory-based measures of experimental pain modulation, including conditioned pain modulation and temporal summation.</p>

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Acute responses of strength training and walking on experimental pain modulation in women with fibromyalgia: an exploratory quasi-experimental study

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年2月20日

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  • Thayná Soares de Melo,
  • André Pontes-Silva,
  • Isadora de Oliveira Barbosa,
  • Mariana Arias Avila

摘要

Purpose

To explore acute changes in laboratory-based indices of experimental pain modulation in women with fibromyalgia following two exercise modalities (strength training vs. walking) during the first and fourth weeks of an exercise program.

Methods

This exploratory quasi-experimental study employed a repeated measures design and was conducted as a secondary analysis of a registered clinical trial. Women diagnosed with fibromyalgia were allocated to either a walking or a strength training group. The walking group performed moderate-intensity treadmill walking (60–70% of estimated maximum heart rate) for 40 min, while the strength training group completed moderate-intensity resistance exercises prescribed at 50% of one-repetition maximum, determined using the 1-RM test. Laboratory-based measures of experimental pain sensitivity and endogenous pain modulation—including pressure pain thresholds, temporal summation, and conditioned pain modulation—were assessed before and after exercise sessions in the first and fourth weeks.

Results

18 women with fibromyalgia and comparable baseline characteristics were evaluated. Between-group and within-group comparisons across time revealed no statistically detectable differences in experimental pain sensitivity or endogenous pain modulation indices (p ≥ .05). Observed changes were small and accompanied by wide confidence intervals, reflecting substantial interindividual variability and the absence of consistent acute exercise-related patterns.

Conclusion

Neither walking nor strength training produced statistically detectable differences in laboratory-based measures of experimental pain modulation, including conditioned pain modulation and temporal summation.