Purpose: To assess the effect of low-to-moderate-intensity exercise on specific blood biomarkers and blood acidity in young Saudi Arabian professional soccer players.
Methods: A total of 43 professional soccer players participated in the current study. A cross-sectional research method was used to compare the changes in the following blood biomarkers: calcium, magnesium, glucose, anion-gap metabolic acidosis, and carbon dioxide, after a range of low-to-moderate intensity training sessions. Measurements were taken in two soccer training sessions (Day 1, and Day 2). The exercise intensity was estimated by heart rate percentage of maximal heart rate. Wilcoxon signed-rank testing was used to analyze the results.
Results: Significant differences were found between and pre-and post-training sessions for anion-gap metabolic acidosis: Day 1: 12.55 vs 15.4 mmol/L; Day 2: 14.15 vs 16.35 mmol/L; and magnesium: Day 1: 0.82 vs 0.74 mmol/L; Day 2: 0.85 vs 0.74 mmol/L. Exercise caused anion-gap metabolic acidosis concentrations to rise post-training; magnesium levels decreased after training sessions on Day 1 and Day 2.
Conclusion: The concentrations of anion-gap metabolic acidosis and magnesium were significantly affected by exercise intensity in the subjects, the former rose post-training while the latter fell. More studies are required to investigate the effects of different exercise intensities on other blood biomarkers in soccer players.

Keywords: blood biomarkers, exercise intensity, acidity, serum


中文翻译：

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高强度足球训练对沙特年轻足球运动员血酸度显着生化指标的影响

目的：评估中低强度运动对沙特阿拉伯年轻职业足球运动员特定血液生物标志物和血液酸度的影响。
方法：共有43名职业足球运动员参加了本次研究。采用横断面研究方法比较了在一系列中低强度训练后，以下血液生物标志物的变化：钙、镁、葡萄糖、阴离子间隙代谢性酸中毒和二氧化碳。在两次足球训练课（第 1 天和第 2 天）中进行了测量。运动强度是通过心率占最大心率的百分比来估计的。Wilcoxon 符号秩检验用于分析结果。
结果：阴离子间隙代谢性酸中毒训练前和训练后的显着差异：第 1 天：12.55 对 15.4 mmol/L；第 2 天：14.15 对 16.35 mmol/L；和镁：第 1 天：0.82 对 0.74 mmol/L；第 2 天：0.85 对 0.74 mmol/L。运动导致阴离子间隙代谢性酸中毒浓度在训练后升高；第1天和第2天训练后镁水平下降。
结论：阴离子间隙代谢性酸中毒和镁的浓度受运动强度的影响显着，前者在训练后上升，后者下降。需要更多的研究来调查不同运动强度对足球运动员其他血液生物标志物的影响。

关键词：血液生物标志物，运动强度，酸度，血清