BACKGROUND To evaluate the association between preoperative exercise and recovery after cardiac surgery. METHODS Literature comparing preoperative exercise and the control group for patients receiving cardiac surgery was retrieved in multiple databases. Review Manager 5.2 was adopted for meta-analysis, sensitivity analysis and bias analysis. RESULTS Finally, 6 relevant studies satisfied the inclusion criteria. There was significant difference in length of stay in intensive care unit (ICU) (MD- = 1.35, 95%CI [- 2.64, - 0.06], P = 0.04; P for heterogeneity < 0.0001, I2 = 88%) and physical function after operation (P of heterogeneity = 0.32, I2 = 12%, Z = 9.92, P of over effect< 0.00001). The meta-analysis suggested that there was no significant difference in white blood cell count (WBC) at postoperative day 7 and mental health after operation between the exercise group and the control group. Limited publication bias was observed in this study. CONCLUSION Preoperative exercise including inhaled muscle training, aerobics, resistance training and stretching could promote recovery after cardiac surgery.

中文翻译：

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心脏手术后的术前运动和恢复：荟萃分析。

背景 评估术前运动与心脏手术后恢复之间的关联。方法在多个数据库中检索比较心脏手术患者术前运动和对照组的文献。采用Review Manager 5.2进行荟萃分析、敏感性分析和偏倚分析。结果最终有6项相关研究满足纳入标准。重症监护病房 (ICU) 的住院时间 (MD- = 1.35, 95%CI [- 2.64, - 0.06], P = 0.04; 异质性 P < 0.0001, I2 = 88%) 和身体功能存在显着差异术后（异质性 P = 0.32，I2 = 12%，Z = 9.92，过度效应 P< 0.00001）。荟萃分析表明，运动组与对照组术后第7天白细胞计数（WBC）和术后心理健康状况无显着差异。本研究观察到有限的发表偏倚。结论 术前运动包括吸气肌训练、有氧运动、阻力训练和伸展运动可以促进心脏手术后的恢复。