Abstract Objective This study aims to evaluate the effect of functional versus resistance exercise training on the functional capacity and quality of life of psoriatic arthritis patients. Methods Forty-one psoriatic arthritis patients (18 to 65 years old) were randomized into two groups: functional training group and resistance exercise group. The functional training group underwent functional exercises with elastic band and the functional training group underwent machine resistance exercise twice a week for 12 weeks. Outcome measures were: The Bath Ankylosing Spondylitis Functional Index (BASFI) and Health Assessment Questionnaire for the Spondyloarthropathies (HAQ-S) for functional capacity and functional status, one-repetition maximum test for muscle strength, the Short Form 36 health survey questionnaire (SF-36) for quality of life, and the Bath Ankylosing Spondylitis Disease Activity Index (BASDAI) and the Disease Activity Score 28 (DAS-28) for disease activity. Analyzes were performed by a blinded evaluator at baseline (T0), six (T6) and twelve (T12) weeks after the beginning of the exercise. Results At baseline, the groups were homogeneous in the clinical and demographic characteristics. There was a statistical intra-group improvement for both groups in the BASFI, BASDAI, HAQ-s, and DAS-28. In the quality-of-life assessment, both groups showed statistical intra-group improvements for all domains except the “emotional aspect” domain in the resistance exercise group. In the muscle strength, there was a statistical improvement for all exercises in both groups, except for the “alternate biceps (bilateral)” exercise. Conclusion Functional training and resistance exercise are similarly effective in improving functional capacity, functional status, disease activity, general quality of life, and muscle strength in patients with psoriatic arthritis. Trial Registration ClinicalTrials.gov: NCT04304326. Registered 11 March 2020, https://clinicaltrials.gov/ct2/show/NCT04304326?term=NCT04304326&draw=2&rank=1.

RESUMO CONTEXTO E OBJETIVO: A espondilite anquilosante (EA) gera inflamação e dor em enteses, articulações periféricas e coluna vertebral. A educação na EA pode melhorar a incapacidade dos pacientes. Assim, é importante avaliar o conhecimento do paciente. Não há na literatura instrumento que avalie o conhecimento da EA na língua portuguesa. O objetivo foi traduzir para a língua portuguesa brasileira, realizar a adaptação cultural e testar a confiabilidade do questionário Ankylosing Spondylitis: What do you know? e relacionar os resultados com outros fatores. TIPO DE ESTUDO E LOCAL: Artigo original de validação de questionário realizado na Universidade Federal de São Paulo (Unifesp). MÉTODOS: Para tradução e adaptação cultural, foi utilizada a metodologia de Guilleman. Depois da primeira fase, a confiabilidade foi testada em 30 pacientes. Correlações entre esses escores e outros fatores foram avaliadas. RESULTADOS: Na avaliação interobservador, o coeficiente de correlação de Pearson e o alpha de Cronbach foram de 0,831 e 0,895, respectivamente. Na avaliação intra-observador, o coeficiente de correlação intraclasse e o alpha de Cronbach foram de 0,79 e 0,883, respectivamente. Nesta etapa, foram encontradas correlações entre etnia e escolaridade e a área de conhecimento A, e entre idade e a área D; entre o escore total e escores das áreas A e B e "aspectos sociais" do SF-36 e entre a área D e "dor", "vitalidade" e "aspectos emocionais" do SF-36. CONCLUSÃO: Foi criada a versão brasileira do questionário "Ankylosing Spondylitis: What do you know?", que é reprodutível e se correlaciona com escolaridade, etnia e os domínios "aspectos sociais" e "aspectos emocionais" do SF-36.

ABSTRACT CONTEXT AND OBJECTIVE: Ankylosing spondylitis (AS) generates inflammation and pain in entheses, peripheral joints and the spine. Education regarding AS can improve patients' disability. Thus, it is important to assess patients' knowledge. There is no instrument in the literature for assessing knowledge of AS in Portuguese. The aim here was to translate to the Brazilian Portuguese language, culturally adapt and test the reliability of the questionnaire "Ankylosing Spondylitis: What do you know?" and to correlate the findings with other factors. DESIGN AND SETTING: Original article regarding validation of questionnaire, produced at the Federal University of Sao Paulo (Unifesp). METHODS: For translation and cultural adaptation, Guilleman methodology was used. After the first phase, the reliability was tested on 30 patients. Correlations between these scores and other factors were examined. RESULTS: In the interobserver assessment, the Pearson correlation coefficient and Cronbach's alpha were 0.831 and 0.895, respectively. In the intraobserver evaluation, the intraclass correlation coefficient and Cronbach's alpha were 0.79 and 0.883, respectively. At this stage, the score for area of knowledge A showed correlations with ethnicity and education; the score for area D, with age; the total score and scores for areas A and B with "social aspects" of SF-36; and the score for area D with "pain", "vitality" and "emotional aspects" of SF-36. CONCLUSION: The Brazilian version of the questionnaire "Ankylosing Spondylitis: What do you know?" was created. It is reproducible and correlates with education level, ethnicity and the SF-36 domains "social aspects" and "emotional aspects".