Cardiac fatigue and oxygen kinetics after prolonged exercise.
BACKGROUND
Although the underlying mechanisms responsible for cardiac dysfunction after prolonged exercise remains to be elucidated, it has reported cardiac deterioration following exhaustive exercise in the absence of underlying cardiovascular diseases, which has been attributed to cardiac fatigue. The study was designed to investigate the effects of after fatiguing exercise on oxygen kinetics.


METHODS
Six athletes have taken examination, firstly by echocardiography, secondly by cardiopulmonary exercise testing and then by near-infrared spectroscopy (NIRS), before 2 days (pre-race) and after 1 day (post-race) marathon competition.


RESULTS
We found decrease in left ventricular systolic and diastolic functions, and peak oxygen consumption while increasing half time of muscular oxygen delivery after race period.


CONCLUSIONS
Cardiopulmonary exercise testing in conjunction with oxygen kinetics of skeletal muscle measured by NIRS may be a tool for detecting cardiac fatigue.
Kasikcioglu
Erdem
E
Arslan
Armagan
A
Topcu
Berrin
B
Sayli
Omer
O
Akhan
Hulya
H
Oflaz
Huseyin
H
Akin
Ata
A
Kayserilioglu
Abidin
A
Meric
Mehmet
M
D000328:Adult; D015444:Exercise / Q000502:physiology*; D006801:Humans; D008297:Male; D018482:Muscle, Skeletal / Q000502:physiology*; D010100:Oxygen / Q000378:metabolism*; D010101:Oxygen Consumption / Q000502:physiology; D019265:Spectroscopy, Near-Infrared; D018487:Ventricular Dysfunction, Left / Q000503:physiopathology*; D016277:Ventricular Function, Left / Q000502:physiology
D010100:Oxygen