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Background: Ankylosing spondylitis (AS) is a very tricky orthopedic disorder. If such condition cannot be managed fairly well, it may significantly affect quality of life and even leads to disability among such population. A variety of studies have reported that alendronate is utilized for the treatment of AS. However, their results are still contrary, and no systematic review has addressed on this topic. Thus, this study will systematically assess the efficacy and safety of alendronate for the treatment of patients with AS. Methods: A comprehensive literature search will be performed from the below electronic databases from their commencement to the January 31, 2020 without language and publication status limitations: PubMed, Embase, Cochrane Library, Web of Science, Allied and Complementary Medicine Database, WANGFANG, and China National Knowledge Infrastructure. Only randomized controlled trials focusing on the alendronate for the treatment of patients with AS will be considered for inclusion in this study. Two authors will independently select all identified records, extract essential data from all included studies, and appraise study quality for each eligible trial using Cochrane risk of bias. If any differences occur, another experienced author will be invited to solve them by discussion and a consensus decision will be made. We will implement RevMan 5.3 software to analyze the extracted data. Results: This study will summarize high-quality randomized controlled trials to assess the efficacy and safety of alendronate for the treatment of patients with AS through primary outcome of bone densitometry; and secondary outcomes of pain intensity, quality of life, disease activity, functional status, and adverse events. Conclusion: This study will provide evidence to help determine whether alendronate is an effective and safe management for patient with AS or not. Study registration: INPLASY202040153.

Background: This systematic review protocol will appraise the effectiveness and safety of electrical stimulation (ES) for limb spasticity (LS) in children with stroke. Methods: Cochrane Library, EMBASE, PUBMED, PsycINFO, Scopus, OpenGrey, CINAHL, ACMD, CNKI, and WANGFANG will be systematically retrieved for randomized controlled trials (RCTs) testing the effectiveness of ES compared with other interventions on LS in children with stroke. Two independent authors will evaluate eligibility using predefined criteria and will perform data extraction and study quality appraisal of eligible trials. Primary outcomes include gait velocity, and limb spasticity status. Limb function, quality of life, pain intensity, and adverse events will be assessed as secondary outcomes. We will perform data analysis using RevMan 5.3 software. Results: This systematic review will summarize the most recent evidence to assess the effectiveness and safety of ES for LS in children with stroke. Conclusions: The results of this study may help to determine whether ES is effective or not for LS in children with stroke. Study registration: INPLASY202050115.