Background Proximal hamstring tendinopathy (PHT) is a condition that occurs at all ages and levels of sporting participation. Presenting as localised lower buttock pain with tasks such as squatting and sitting, it can cause disability with sport, work and other activities of daily living. Recent research has investigated the effect of isometric exercise on pain and strength with a range of tendinopathies but there are no published studies on PHT. This protocol paper details a study investigating the effectiveness of isometric compared with isotonic exercise on pain and strength in people with PHT. Methods/Design The study is a prospective, cross-over randomised controlled trial (RCT). Twenty participants with PHT, recruited from the local community and sporting clubs will be recruited for the study. Participants will receive one session of isotonic hamstring strength exercises and one session of isometric hamstring exercise, with random allocation to the order of intervention. Primary outcomes will be hamstring strength measured with a dynamometer and pain with a functional task, assessed immediately following and 45 min after intervention. A secondary outcome will be pain with sitting assessed 24 hours after intervention. The effect of isotonic versus isometric exercise on hamstring pain and strength will be determined using a repeated measures linear mixed model. Further analyses will determine the proportion of patients with clinically important pain and strength improvements, using relative risks, χ2 testing and number needed to treat. Discussion This RCT protocol will investigate the effect of isometric compared with isotonic exercise for PHT.

中文翻译：

---

等渗和等距运动对近端绳肌腱病疼痛和力量影响的随机，交叉试验：试验方案

背景近端绳肌腱病（PHT）是一种在所有年龄段和水平的体育锻炼中均会发生的疾病。表现为下蹲和坐姿等局部下臀部疼痛，会导致运动，工作和日常生活中的其他活动致残。最近的研究已经研究了等距锻炼对一系列肌腱病的疼痛和力量的影响，但尚无有关PHT的公开研究。该协议文件详细研究了一项研究，研究了等距锻炼与等渗锻炼相比对PHT患者疼痛和力量的影响。方法/设计这项研究是一项前瞻性，交叉随机对照试验（RCT）。从当地社区和体育俱乐部招募的20名PHT参与者将被招募参加这项研究。参与者将接受一期等张的绳肌力量练习和一期等距的ham绳肌锻炼，并随机分配干预顺序。主要结果将是用测力计测量绳肌力量，并执行功能性任务疼痛，并在干预后和干预后45分钟进行评估。次要结果是干预后24小时评估坐姿的疼痛。等渗与等距锻炼对on绳肌疼痛和力量的影响将使用重复测量的线性混合模型来确定。进一步的分析将使用相对风险，χ2测试和治疗所需的数量来确定具有重要临床意义的疼痛和力量改善的患者比例。