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<p>This study aims to assess the effects of aquatic training (AT) and its combination with photobiomodulation (PBM) on cytokine synthesis and plantar muscle morphology during compensatory hypertrophy (H) in Wistar rats. H was induced by bilateral ablation of synergistic muscles, and PBM using a laser (780&#xa0;nm). AT involved 60&#xa0;min sessions, 5 times/week, for 7 and 14 days. Muscle weight relative to body weight did not differ significantly between groups. TNF-α synthesis levels decreased in the H + AT + PBM group at 7 days compared to H Control. IL-6 and IL-1β levels showed no significant changes. Cross-sectional area (CSA) was higher in H + AT + PBM at 7 days and 14 days compared to H + AT and H Control. Fiber diameter increased in H + AT and H + AT + PBM compared to H at 14 days. AT with PBM decreased TNF-α expression, increased CSA and fiber diameter, whereas AT alone increased fiber diameter. In conclusion, the combination of photobiomodulation (PBM) therapy and aquatic training (AT) effectively reduced TNF-α levels while increasing muscle fiber diameter and cross-sectional area (CSA). Furthermore, AT alone demonstrated the capacity to maintain fiber diameter.</p> Graphical abstract <p></p>

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Photobiomodulation and aquatic training reduce TNF-α expression and enhance muscle fiber area in Wistar rats with compensatory hypertrophy

  • 期刊论文

  • 发表日期：

    2025年1月27日

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  • Valéria Araújo Gregio,
  • Andreia Martinelli,
  • Tainá Caroline dos Santos Malavazzi,
  • Lucas Andreo,
  • Stella Maris Lins Terena,
  • Sandra Kalil Bussadori,
  • Rodrigo Labat Marcos,
  • Anna Carolina Ratto Tempestini Horliana,
  • Kristianne Porta Santos Fernandes,
  • Raquel Agnelli Mesquita-Ferrari

摘要

This study aims to assess the effects of aquatic training (AT) and its combination with photobiomodulation (PBM) on cytokine synthesis and plantar muscle morphology during compensatory hypertrophy (H) in Wistar rats. H was induced by bilateral ablation of synergistic muscles, and PBM using a laser (780 nm). AT involved 60 min sessions, 5 times/week, for 7 and 14 days. Muscle weight relative to body weight did not differ significantly between groups. TNF-α synthesis levels decreased in the H + AT + PBM group at 7 days compared to H Control. IL-6 and IL-1β levels showed no significant changes. Cross-sectional area (CSA) was higher in H + AT + PBM at 7 days and 14 days compared to H + AT and H Control. Fiber diameter increased in H + AT and H + AT + PBM compared to H at 14 days. AT with PBM decreased TNF-α expression, increased CSA and fiber diameter, whereas AT alone increased fiber diameter. In conclusion, the combination of photobiomodulation (PBM) therapy and aquatic training (AT) effectively reduced TNF-α levels while increasing muscle fiber diameter and cross-sectional area (CSA). Furthermore, AT alone demonstrated the capacity to maintain fiber diameter.

Graphical abstract