Blood flow in different adipose tissue depots during prolonged exercise in dogs

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Abstract
Adipose tissue blood flow was measured by the microsphere technique in all major adipose tissue depots in dogs during exercise. The measurements were done during rest, after 1 and 2 h of exercise and after a postexercise rest period. It was found that the blood flow to the inguinal, subcutaneous adipose tissue increased from about 6 ml/(100g·min) during rest to about 10 ml/(100 g·min) during exercise. This increase in flow was significantly smaller than the increase found in the perirenal, the mesenteric and the pericardial depots. In these depots the resting blood flow was about 10 ml/(100 g·min) increasing to about 30 ml/(100 g·min) during exercise. It is concluded that the increase in adipose tissue blood flow during exercise is a general phenomenon for all major adipose tissue depots. The increase in flow in the inguinal, subcutaneous fat pad was comparable to the previously described increase in flow in abdominal, subcutaneous tissue in man. Blood flow to abdominal skin was constant during exercise, while the flow in tissues from the gastrointestinal canal and in the kidneys decreased. The flow in the tongue and in the Achilles tendon significantly increased during exercise.

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