Background The relationship between hamstring muscle injuries (HMIs) that involve the intramuscular tendon and prolonged recovery time and increased reinjury rate remains unclear in elite footballers. Objective To determine the association of time to return to full training (TRFT) and reinjury of HMIs using the British Athletic Muscle Injury Classification (BAMIC) and specific anatomical injury location in elite-level football players. Methods The electronic medical records of all players at an English Premier League club were reviewed over eight consecutive seasons. All players who sustained an acute HMI were included. Two experienced musculoskeletal radiologists independently graded each muscle using the BAMIC, categorised each injury location area (proximal vs middle vs distal third and proximal vs distal tendon) and reported second muscle involvement. TRFT and reinjury were recorded. Results Out of 61 HMIs, the intramuscular tendon (BAMIC ‘c’) was involved in 13 (21.3%). HMI involving the intramuscular tendon (‘c’) had a mean rank TRFT of 36 days compared with 24 days without involvement (p=0.013). There were 10 (16.4%) reinjuries with a significant difference of 38.5% reinjury rate in the group with intramuscular tendon injury (‘c’) and 12.5% in the group without (p=0.031). TRFT and reinjury involving a second muscle was statistically significantly higher than without. Most of the HMIs to the biceps femoris with reinjury (5 out of 9) were in the distal third section related to the distal tendon site involving both the long and short head. Conclusion TRFT in HMI involving the intramuscular tendon (‘c’) of the Biceps femoris is significantly longer with significantly higher reinjury rate compared with injuries without, in elite football players. The finding that most reinjures of the biceps femoris occurring in the distal third muscle at the distal tendon site, involving both the long and short head, merits further investigation. No data are available. All data are reported.

中文翻译：

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英国运动型肌肉损伤分类和解剖位置协会在精英足球中腿筋受伤后恢复全面训练和再损伤

背景 在精英足球运动员中，涉及肌内肌腱的腘绳肌损伤 (HMI) 与恢复时间延长和再损伤率增加之间的关系仍不清楚。目的使用英国运动性肌肉损伤分类 (BAMIC) 和精英级足球运动员的特定解剖损伤位置确定恢复全面训练 (TRFT) 和 HMI 再损伤的时间之间的关联。方法 连续8个赛季回顾英超俱乐部所有球员的电子病历。包括所有持续急性 HMI 的球员。两位经验丰富的肌肉骨骼放射科医生使用 BAMIC 独立对每块肌肉进行分级，对每个损伤位置区域进行分类（近端与中端与远端三分之一以及近端与远端肌腱）并报告第二肌肉受累。记录 TRFT 和再损伤。结果 在 61 个 HMI 中，13 个（21.3%）涉及肌内肌腱（BAMIC'c'）。涉及肌内肌腱（'c'）的 HMI 的平均等级 TRFT 为 36 天，而没有参与的为 24 天（p=0.013）。有 10 例（16.4%）再次损伤，肌内肌腱损伤组（'c'）的再损伤率为 38.5%，无肌腱损伤组为 12.5%（p=0.031）。TRFT 和涉及第二块肌肉的再损伤在统计学上显着高于没有。大多数再损伤的股二头肌 HMI（9 个中的 5 个）位于与涉及长头和短头的远端肌腱部位相关的远端第三部分。结论 与没有受伤的精英足球运动员相比，涉及股二头肌肌内肌腱 ('c') 的 HMI 中的 TRFT 显着更长，再受伤率显着更高。大多数股二头肌再损伤发生在远端肌腱部位的远端第三肌肉，涉及长头和短头，值得进一步研究。没有可用的数据。报告所有数据。