Forty senior athletes between 35 to approximately 80 yrs old with a positive score will be included in one group, and another forty seniors without positive score in a control group. Each of them will be tested with an cardiorespiratory exercise test (CPET) with ECG and examined with echocardiography together with an usual medical examination and blood tests (cholesterol and HbA1c-glucose). Some with symptoms of arrhythmias will be examined by 24-hours Holter-monitoring.