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<p>Breast cancer survivors are at increased risk of cardiovascular and autonomic dysfunction following adjuvant chemotherapy, and exercise interventions may help mitigate these effects. This randomized prospective study evaluated the effects of a supervised, online-delivered exercise intervention on cardiorespiratory fitness, cardiac autonomic modulation, body composition, and quality of life in breast cancer survivors after chemotherapy. Seventy-two women were allocated to an exercise group or usual care. The intervention consisted of a 12-week home-based exercise program conducted online, with aerobic intensity individualized to 60–80% of peak oxygen uptake. Cardiorespiratory fitness was assessed using cardiopulmonary exercise testing and the 6-min walk test, while heart rate variability was monitored longitudinally and analyzed using linear mixed-effects models. Body composition and patient-reported outcomes were assessed at baseline, post-chemotherapy, and post-intervention. The online supervised exercise resulted in a significant improvement in peak oxygen uptake (+ 2.1&#xa0;ml kg<sup>−1</sup>&#xa0;min<sup>−1</sup>), which exceeded changes observed in the control group (<i>p</i> = 0.009). Improvements in 6-min walk distance and recovery of heart rate variability occurred irrespective of group allocation. Changes in body composition, quality of life and the improvement of heart rate variability metrics did not differ between groups.</p>

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The impact of online-delivered controlled physical activity on cardiorespiratory fitness and heart rate variability in breast cancer survivors

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年5月7日

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  • L. Bohovicová,
  • K. Šumberová,
  • I. Burešová,
  • M. Palácová,
  • K. Petráková,
  • L. Gescheidtová,
  • M. Řiháček,
  • I. Kiss,
  • P. Bazalová,
  • I. Hrnčiříková,
  • E. Řiháčková,
  • J. Halámková

摘要

Breast cancer survivors are at increased risk of cardiovascular and autonomic dysfunction following adjuvant chemotherapy, and exercise interventions may help mitigate these effects. This randomized prospective study evaluated the effects of a supervised, online-delivered exercise intervention on cardiorespiratory fitness, cardiac autonomic modulation, body composition, and quality of life in breast cancer survivors after chemotherapy. Seventy-two women were allocated to an exercise group or usual care. The intervention consisted of a 12-week home-based exercise program conducted online, with aerobic intensity individualized to 60–80% of peak oxygen uptake. Cardiorespiratory fitness was assessed using cardiopulmonary exercise testing and the 6-min walk test, while heart rate variability was monitored longitudinally and analyzed using linear mixed-effects models. Body composition and patient-reported outcomes were assessed at baseline, post-chemotherapy, and post-intervention. The online supervised exercise resulted in a significant improvement in peak oxygen uptake (+ 2.1 ml kg−1 min−1), which exceeded changes observed in the control group (p = 0.009). Improvements in 6-min walk distance and recovery of heart rate variability occurred irrespective of group allocation. Changes in body composition, quality of life and the improvement of heart rate variability metrics did not differ between groups.