Department of Food and Nutrition, Poznan University of Physical Education, Poznań, Greater Poland, Poland.
Department of Physiology and Biochemistry, Poznan University of Physical Education, Poznań, Greater Poland, Poland.
PeerJ. 2023 Jan 20;11:e14594. doi: 10.7717/peerj.14594. eCollection 2023.
Cyclists often use high-carbohydrate, low-fiber diets to optimize the glycogen stores and to avoid the gastrointestinal distress during both, the trainings and the competitions. The impact of such dietary changes on gut microbiota is not fully known.
We assessed the abundances of , , spp., and spp. and the fecal pH in 14 amateur cyclists during the racing season. Eleven healthy men formed the control group.
Despite significant differences in the diet composition and physical endurance levels of amateur cyclists before the competition season (1st term) and control group (carbohydrates: 52.2% ± 4.9% 41.9% ± 6.6%; VOmax: 56.1 ± 6.0 39.7 ± 7.7; < 0.01; respectively), we did not observe any significant differences in studied gut bacteria abundances or fecal pH between the groups. Although the cyclists' carbohydrates consumption (2nd term) have increased throughout the season (4.48 g/kg b.w. ± 1.56 5.18 g/kg b.w. ± 1.99; < 0.05), the studied gut bacteria counts and fecal pH remained unchanged. It seems that the amateur cyclists' diet with increased carbohydrates intake does not alter the gut microbiota, but further research is needed to assess the potential impact of even higher carbohydrates consumption (over 6 g/kg b.w.).
自行车运动员经常采用高碳水化合物、低纤维的饮食方案，以优化糖原储备，并避免在训练和比赛期间出现胃肠道不适。但这种饮食变化对肠道菌群的影响尚不完全清楚。
我们评估了 14 名业余自行车运动员在比赛赛季期间的、、、 spp. 和粪便 pH 值。11 名健康男性组成对照组。
尽管自行车运动员在比赛赛季前（第 1 期）和对照组（碳水化合物：52.2%±4.9% 41.9%±6.6%；最大摄氧量：56.1±6.0 39.7±7.7；<0.01）的饮食组成和身体耐力水平存在显著差异，但我们没有观察到两组之间研究的肠道细菌丰度或粪便 pH 值有任何显著差异。尽管自行车运动员的碳水化合物摄入量（第 2 期）在整个赛季中有所增加（4.48 g/kg b.w.±1.56 5.18 g/kg b.w.±1.99；<0.05），但研究的肠道细菌计数和粪便 pH 值保持不变。似乎增加碳水化合物摄入的业余自行车运动员饮食不会改变肠道微生物群，但需要进一步研究来评估更高的碳水化合物摄入（超过 6 g/kg b.w.）的潜在影响。
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