Background: This study aimed to produce the Indonesian version of the Anterior Cruciate Ligament-Return to Sport After Injury (ACL-RSI) questionnaire and determine the value of content validity, construct validity, known-groups validity, and internal consistency reliability. Methods: First, the ACL-RSI questionnaire was translated through a cross-cultural adaptation process. Six experts in related fields assessed the adapted questionnaire by giving scores on four criteria: relevance, clarity, simplicity, and ambiguity, which will be calculated into content validity value. Seventy-one participants who experienced ACL injury because of sporting activities and had undergone reconstruction who joined the online community for Knee Injury Patients Support Group filled out the ACL-RSI to determine the known-groups validity and internal consistency reliability. The participants also filled out the Indonesian version of the Knee Injury and Osteoarthritis Outcome Score (KOOS) as a comparison to test construct validity. Results: The calculated content validity value obtained from the experts’ scoring was S-CVI/Ave = 0.97. Construct validity between ACL-RSI and all KOOS subscales showed a strong positive correlation with r = 0.78-0.87. Two hypotheses for known-groups validity were proven, with the group that had returned to their specific sport having a better ACL-RSI score than the group that had not returned (70.2 ± 10.0 vs. 49.3 ± 18.8, p<0.001), and the group planned to return to their specific sport as before the injury had a better ACL-RSI score than the group who did not intend to return (60.3 ± 16.5 vs. 32.6 ± 2.4, p<0.001). Internal consistency ACL-RSI showed very good reliability with Cronbach’s alpha = 0.96. Conclusions: The Indonesian version of ACL-RSI is valid and reliable for evaluating psychological readiness to return to sports after ACL reconstruction. However, a seemingly further similar study is necessary to fix the weaknesses in this study to produce a more representative Indonesian version of the ACL-RSI questionnaire.

Introduction: Coronavirus disease (COVID-19) has spread rapidly and massively from China to the rest of the world. Many of the hospitalized COVID-19 patients suffered from psychiatric symptoms such as anxiety and sleep disturbances, besides physical symptoms. Treatment of the psychiatric symptoms commonly used sedative, hypnotic, and anti-anxiety drugs. However, these drugs have some side effects. As an alternative, non-pharmacological intervention is needed. Some previous studies have shown that progressive muscle relaxation (PMR) can improve anxiety levels and sleep quality in other hospitalized patients. Therefore, this study was conducted to determine the effectiveness of PMR in hospitalized COVID-19 patients who experienced anxiety and sleep disturbances. Methods: We conducted a narrative review by searching for studies through PubMed and Google Scholar database with a publication time span from 2020 to 2021. Keywords used in the search: [“anxiety” or “sleep quality” or “sleep disturbances” or “COVID-19” or “patients”] and [“progressive muscle relaxation”]. Results: Based on the search result, we found three related articles: two randomized controlled trials and one observational study. The studies examined the effectiveness of PMR to improve anxiety and sleep quality in hospitalized COVID-19 patients. In the results of the three studies, PMR was effective in improving anxiety symptoms and sleep quality in COVID-19 patients. Conclusion: Considering not least of hospitalized COVID-19 patients who experienced anxiety and sleep disturbances, PMR as a non-pharmacological intervention can be implemented, because it is easy to perform and proven effective in reducing anxiety and sleep disturbances.