title: Haemoglobin saturation during incremental arm and leg exercise.
abstract: There are few reports concerning the alterations in the percent of haemoglobin saturated with oxygen (%SO2) during non-steady state incremental exercise. Further, no data exist to describe the %SO2 changes during arm exercise. Therefore, the purpose of this study was made to assess the dynamic changes in %SO2 during incremental arm and leg work. Nine trained subjects (7 males and 2 females) performed incremental arm and leg exercise to exhaustion on an arm crank ergometer and a cycle ergometer, respectively. Ventilation and gas exchange measurements were obtained minute by minute via open circuit spirometry and changes in %SO2 were recorded via an ear oximeter. No significant difference (p greater than 0.05) existed between arm and leg work in end-tidal oxygen (PETO2), end-tidal carbon dioxide (PETCO2), or %SO2 when compared as a function of percent VO2 max. These results provide evidence that arterial O2 desaturation occurs in a similar fashion in both incremental arm and leg work with the greatest changes in %SO2 occurring at work rates greater than 70% VO2 max.
mesh_terms: D001132:Arm / Q000098:blood supply / Q000378:metabolism; D002245:Carbon Dioxide / Q000502:physiology; D005080:Exercise Test; D005260:Female; D006454:Hemoglobins / Q000378:metabolism*; D006801:Humans; D007866:Leg / Q000098:blood supply / Q000378:metabolism; D008297:Male; D010100:Oxygen / Q000097:blood* / Q000502:physiology; D005082:Physical Exertion; D011659:Pulmonary Gas Exchange
chemical_list: D006454:Hemoglobins; D002245:Carbon Dioxide; D010100:Oxygen