<prompt> Athletic syndrome is characterized by-Increased amplitude of QRSTachycardiaDecreased QT intervalU-waves  <response>: Athletic hea syndrome AHS is a non-pathological condition commonly seen in spos medicine in which the human hea is enlarged, and the resting hea rate is lower than normal. The athletes hea is associated with physiological remodeling as a consequence of repetitive cardiac loading . Ref Harrison 20th edition pg 1421 