Luzera desberdineko ariketa fisikoko esku-hartzeen eragina ospitalizazio bat pairatu duten adinekoen funtzio fisiko, egoera nutrizional, bizi-kalitate, hauskortasun eta sarkopenian / Effect of different-lengths physical exercise interventions on physical function, nutritional status, quality of life, frailty, and sarcopenia in post-hospitalized older adults