Effect of Nurse-Led Intradialytic Stretching Exercises on Muscle Cramp Burden Among Patients Undergoing Maintenance Hemodialysis: A Randomized Controlled Trial

1. The Problem: The Burden of Intradialytic Muscle Cramps For patients undergoing maintenance hemodialysis (HD), the treatment is a life-sustaining necessity that comes with a significant symptom burden. Among the most common and disruptive of these symptoms are intradialytic muscle cramps-sudden, involuntary, and painful muscle contractions, primarily in the lower limbs. These episodes are not merely a minor inconvenience; they represent a serious clinical challenge. Cramps can be severe enough to forcibly halt a dialysis session, trigger distress calls to nurses, and necessitate urgent interventions such as sterile saline boluses or adjustments to the ultrafiltration rate. These reactive measures disrupt the dialysis process, can lead to hemodynamic instability, and increase nursing workload. For the patient, the experience is one of pain, anxiety, and a diminished quality of life. Estimates suggest these cramps affect a wide proportion, between 20% to 85%, of the chronic HD population.
2. The Proposed Solution: A Proactive, Nurse-Led Intervention Traditional management of these cramps has largely been reactionary. This study proposes to test a paradigm shift: moving from reactive treatment to proactive, nurse-led prevention. The intervention under investigation is a standardized protocol of lower-limb stretching exercises, administered during the dialysis session (intradialytically). The rationale is grounded in exercise physiology: sustained stretching is believed to improve muscle flexibility, enhance local circulation, and modulate neuromuscular excitability, potentially raising the threshold at which a cramp is triggered. By leveraging the time patients are already connected to the dialysis machine and the constant presence of a nurse, this strategy offers a low-cost, non-pharmacological, and patient-centric approach that aligns with nursing values of health promotion and continuity of care.
3. Study Design and Rigor

To generate high-quality evidence, this study employs a single-center, parallel-group, randomized controlled trial (RCT) design. In this design, 60 eligible adult patients from the Beni-Suef University Hospital HD unit will be randomly assigned to one of two groups:

The Intervention Group: Will receive the nurse-led intradialytic stretching program in addition to usual care.

The Control Group: Will continue to receive usual care without any structured exercise program.

This randomization process is intended to ensure that the groups are similar in all key aspects at the beginning of the study. To safeguard the integrity of the intervention, the research team will use a fidelity checklist to ensure every stretching session is delivered consistently and correctly. 4. The Intervention in Detail The stretching protocol is designed to be both effective and feasible within a busy dialysis unit. It targets the primary muscle groups involved in cramps: the ankle dorsiflexors, gastrocnemius, soleus, and hamstrings.