Details

Autor(en) / Beteiligte

• Stickland, Michael K.
• Petersen, Stewart R.
• Haykowsky, Mark J.
• Taylor, Dylan A.
• Jones, Richard L.

Titel

The effects of cycle racing on pulmonary diffusion capacity and left ventricular systolic function

Ist Teil von

• Respiratory physiology & neurobiology, 2003-11, Vol.138 (2), p.291-299

Ort / Verlag

Amsterdarm: Elsevier B.V

Erscheinungsjahr

2003

Quelle

MEDLINE

Beschreibungen/Notizen

• The purpose of this study was to examine the effects of a 20 km cycle race (TT) on left ventricular (LV) systolic and pulmonary function in 12 endurance cyclists. Spirometry, single-breath diffusion capacity (D l CO) with partitioning of membrane (D m) and capillary blood volume (Vc) components and 2-D echocardiograms were performed before and after the TT. During the TT mean oxygen consumption was 3.79±0.5 L·min −1 (83±5.5% of V ̇ O 2 max ) and mean blood lactate was 8.4±2.4 mM. Following the TT, spirometry values were unchanged, however, D l CO and D m were significantly ( P<0.05) reduced. LV systolic function was increased ( P<0.05) immediately after exercise, while end-diastolic area was decreased ( P<0.05) at all points during recovery. The reduction in D m was correlated with LV systolic function following the TT. This relationship suggests a cardiovascular contribution to pulmonary diffusion impairment following exercise.