Heart failure is a pressing worldwide public-health problem with millions of patients having worsening heart failure. Despite all the available therapies, the condition carries a very poor prognosis.

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Correspondence to Argyro Kotsifaki, Rehabilitation Department, Aspetar Orthopaedic and Sports Medicine Hospital, Doha, Ad Dawhah, Qatar; argyro.kotsifaki{at}aspetar.com Objectives Vertical jump ...