マラソンやウルトラマラソンは大腸がんと関連している可能性がある
長距離ランニングと大腸がんの関連性について、新たな研究結果が注目を集めている。激しい持久運動が消化器系に与える影響や、腸内環境の変化、免疫系へのストレスなどが原因として考えられている。ただし、研究は初期段階であり、適度な運動の健康効果は否定されていない。
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