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General comments: 总体评论：
The paper was well-written and aims to address an interesting research question. My major concerns are summarized below, followed by specific comments.
本文撰写得当，旨在探讨一个有趣的研究问题。我的主要关切点如下，随后将提出具体意见。
- The paper is very long. I checked word count limits and the author guidelines state: “Manuscripts with original research should not normally exceed 9,000 words, including headings, references, footnotes and captions, but excluding the abstract. Papers that exceed the word count will be sent back to authors before being peer reviewed.” I used software to count so it may be inaccurate, but the count was >12,000 words. I strongly recommend shortening the paper.
- 论文篇幅过长。我已核查字数限制及作者指南，其中明确规定：“包含原创研究的稿件通常不应超过 9,000 字，包括标题、参考文献、脚注和图注，但不包括摘要。超过字数限制的稿件将在同行评审前退还给作者。”我使用软件统计字数，可能存在误差，但统计结果超过 12,000 字。我强烈建议对论文进行精简。
- It is unclear in the paper why accelerating HRV recovery within 10 min of exercise cessation is relevant.
- 论文中未明确说明为何在运动停止后 10 分钟内加速心率变异性（HRV）恢复具有相关性。
- It is unclear if the intervention has persisting effects or if HRV parameters revert to control values when slow breathing stops since there were no follow-up timepoints.
- 目前尚不清楚干预措施是否具有持续效果，或在缓慢呼吸停止后心率变异性参数是否会恢复至对照组水平，因为没有设置随访时间点。
- There was no measure of mental or physical performance/recovery. Therefore, it is unclear if the enhanced HRV was meaningful to the sport practitioner.
- 没有对心理或身体表现/恢复进行任何测量。因此，目前尚不清楚增强的心率变异性（HRV）对运动实践者是否具有实际意义。
- The lack of RSA recovery significance and unchanged mean HR suggest the mechanisms may be more complex than described.
- RSA 恢复意义的缺失及平均心率未发生变化提示，相关机制可能比描述的更为复杂。
- There seem to be issues with data normality
- 数据的正态性似乎存在问题。
- The study may be more appropriate as a short “Research Note” style paper given the inadequate sample size and lack of outcomes beyond HRV (e.g., performance/recovery markers), and lack of follow-up time points after the intervention.
- 鉴于样本量不足、除心率变异性（HRV）外缺乏其他指标（如表现/恢复指标），以及干预后缺乏随访时间点，本研究更适合作为一篇简短的“研究简报”风格论文。
Introduction: 引言：
The intro provides too much general info and not enough specific info. For example, the intro does not sufficiently explain the importance or implications of accelerating HRV recovery within the first 10 min post-exercise. Does this influence performance? Does this influence psychological factors? Does this influence HRV status hours later or the next morning? Importantly, would the effects of slow breathing be transient? Would the increase in HRV from slow breathing after exercise persist after cessation, or does HRV revert to control levels? This is an important question that was not addressed in the study design.
引言部分提供了过多的通用信息，而缺乏具体细节。例如，引言并未充分解释在运动后 10 分钟内加速心率变异性（HRV）恢复的重要性或影响。这是否会影响运动表现？是否会影响心理因素？是否会影响数小时后或次日早晨的 HRV 状态？重要的是，缓慢呼吸的效果是否是暂时的？运动后缓慢呼吸导致的 HRV 增加在停止后是否会持续，还是 HRV 会恢复到控制水平？这是一个在研究设计中未被探讨的重要问题。
The intro does not explain the physiological mechanisms that cause reduced HRV. For example, suppressed HRV is related to increased circulating catecholamines, lactate/metabolites, body temperature, fluid loss, etc. What is the physiological rationale for slow breathing post-exercise? Does it address any of these processes? Isn’t an elevated respiratory rate necessary to support O2 demand, CO2 removal, EPOC, etc.? Please clarify for the reader.
引言部分未解释导致心率变异性（HRV）降低的生理机制。例如，HRV 降低与循环中儿茶酚胺水平升高、乳酸/代谢物浓度升高、体温升高、体液流失等因素相关。运动后缓慢呼吸的生理依据是什么？这种呼吸方式是否针对上述任何生理过程？难道呼吸频率升高不是为了满足氧气需求、二氧化碳清除、运动后过量氧耗（EPOC）等生理需求吗？请为读者澄清。
Pg. 3 L 30: Is all of this necessary? Participants can’t eat fish, nuts, or salad within 24 h of the study?
第 3 页 第 30 行：这一切都有必要吗？参与者在研究前 24 小时内不能食用鱼类、坚果或沙拉？
Pg. 3 L 52: What was done with menstrual information? How did it influence analyses?
第 3 页 第 52 行：月经信息是如何处理的？它对分析有何影响？
Pg. 7 L 53: What was the procedure for manual correction of ECG abnormalities?
第 7 页 第 53 行：心电图异常的手动校正程序是什么？
Pg. 7 L 56: What was the acceptable level of missing data? Can you report what % of beats were corrected?
第 7 页 第 56 行：缺失数据的可接受水平是多少？能否报告有多少百分比的节拍被纠正？
Pg 11 L 6: Please justify the sample size of 15.
第 11 页 第 6 行：请说明样本量为 15 的理由。
Pg 13. Min value for RSA during BB is negative. Please explain. Is this normal? Pathological?
第 13 页。RSA 在 BB 期间的最小值为负值。请解释。这是正常现象吗？还是病理现象？
Pg. 19 Fig 5. Please include % recovery for mean HR for consistency.
第 19 页 图 5. 请为平均心率（HR）的恢复率添加百分比，以保持一致性。
Pg. 19 L 45: If absolute HR wasn’t reduced by the intervention relative to control, it is questionable whether ANS recovery is actually being accelerated. Subsequent timepoints post-intervention, even if only 10 – 20 min, would’ve been helpful to address this.
第 19 页 第 45 行：如果干预措施相对于对照组并未降低绝对心率，那么自主神经系统恢复是否真正加速值得商榷。干预后后续时间点（即使仅 10–20 分钟）的数据将有助于进一步探讨这一问题。
Pg. 20 L 9: This raises questions about normality. Can you confirm that the residuals were normally distributed? Often, HRV parameters require Ln transformation. The data in Table 4 also suggest issues with the data (very large SD’s relative to mean, potential skewness).
第 20 页 第 9 行：这引发了关于数据正态性的疑问。能否确认残差是否服从正态分布？通常，心率变异性（HRV）参数需要进行对数变换。表 4 中的数据也提示存在数据问题（标准差相对于均值过大，可能存在偏态）。
Pg. 21 L 37: Is RSA a measure of vagal tone or vagal modulation?
第 21 页 第 37 行：RSA 是迷走神经张力还是迷走神经调节的指标？
Conclusion: “Given its potential to accelerate physiological and psychological recovery, controlled breathing presents a simple, cost-free tool for athletes and practitioners to optimize recovery from training and competitions” – This is a bit of a stretch given that the only outcomes were HR/HRV within 10 min of exercise. If HRV reverted to control levels when normal breathing resumed, than is slow breathing really affecting cardiac-ANS recovery in a meaningful way? If it is not accelerating lactate clearance, hydration, body cooling, etc., than I'm skeptical there would be persisting effects once the slow breathing stops. This would be worthy of investigation.
结论：“鉴于其加速生理和心理恢复的潜力，控制呼吸为运动员和从业者提供了一种简单、免费的工具，以优化训练和比赛后的恢复。”——这一结论有些牵强，因为研究中唯一测量的指标是运动后 10 分钟内的心率（HR）和心率变异性（HRV）。如果心率变异性在恢复正常呼吸后回到控制水平，那么缓慢呼吸是否真的以有意义的方式影响了心血管-自主神经系统（CV-ANS）的恢复？如果它并未加速乳酸清除、水分补充、身体降温等过程，那么我对缓慢呼吸停止后持续存在的效果持怀疑态度。这值得进一步研究。
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