Assess the prevalence of physical inactivity and risk of sarcopenia in primary care patients and their companions.OBJECTIVESAssess the prevalence of physical inactivity and risk of sarcopenia in primary care patients and their companions.Cross-sectional study. We carried out an anonymous survey of primary care users (patients and companions) in primary care consultations and stands coinciding with a community health activity for World Physical Activity Day. SITE: Five primary care centers (CAPs) of the South Metropolitan health region: in Cornellà de Llobregat (CAP Jaume Soler), in l'Hospitalet de Llobregat (CAP Florida Nord, CAP Florida Sud and CAP Bellvitge) and in Viladecans (CAP Maria Bernades) between 27 March to April 6, 2023 (coinciding with World Physical Activity Day).DESIGNCross-sectional study. We carried out an anonymous survey of primary care users (patients and companions) in primary care consultations and stands coinciding with a community health activity for World Physical Activity Day. SITE: Five primary care centers (CAPs) of the South Metropolitan health region: in Cornellà de Llobregat (CAP Jaume Soler), in l'Hospitalet de Llobregat (CAP Florida Nord, CAP Florida Sud and CAP Bellvitge) and in Viladecans (CAP Maria Bernades) between 27 March to April 6, 2023 (coinciding with World Physical Activity Day).Primary care population consists of patients and their companions over 18 years of age.PARTICIPANTSPrimary care population consists of patients and their companions over 18 years of age.The health workers administered questionnaires to users and companions.INTERVENTIONSThe health workers administered questionnaires to users and companions.We evaluated physical inactivity with the BPAAT questionnaire, risk of sarcopenia with SARC-F screening test, sex and age range. We performed an univariate descriptive analysis to report prevalence.MAIN MEASUREMENTSWe evaluated physical inactivity with the BPAAT questionnaire, risk of sarcopenia with SARC-F screening test, sex and age range. We performed an univariate descriptive analysis to report prevalence.Nine hundred ninety-eight participants were surveyed. Physical inactivity was present in 38.9% of the participants. Among those over 50 years (665 participants), 15.4% were at risk of sarcopenia (9.58% men, 19.2% women).RESULTSNine hundred ninety-eight participants were surveyed. Physical inactivity was present in 38.9% of the participants. Among those over 50 years (665 participants), 15.4% were at risk of sarcopenia (9.58% men, 19.2% women).The prevalence of physical inactivity and risk of sarcopenia (in individuals over 50 years old) in the studied population is high. Women have greater physical inactivity and a greater risk of sarcopenia than men.CONCLUSIONSThe prevalence of physical inactivity and risk of sarcopenia (in individuals over 50 years old) in the studied population is high. Women have greater physical inactivity and a greater risk of sarcopenia than men.