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  • Title: Site-specific adipose tissue LPL responses to endurance training in female lean Zucker rats.
    Author: Savard R, Greenwood MR.
    Journal: J Appl Physiol (1985); 1988 Aug; 65(2):693-9. PubMed ID: 3170424.
    Abstract:
    The effects of endurance exercise training on adipose tissue have been investigated in female lean Zucker rats. Adult trained rats (TR) were followed throughout a swimming program of 5 wk and were compared with a littermate control sedentary group (SED). Data were collected on days 0, 14, 24, and 36 of the training program. Body weight gain and cumulative food intake were significantly lower in TR than in SED (P less than 0.05). Gastrocnemius citrate synthase activity was increased in TR by day 14 of training (P less than 0.05) and was followed by a second significant increase between days 24 and 36 (P less than 0.05). Although inguinal (ING), parametrial (PAR), and retroperitoneal (RP) cell sizes were decreased by the swimming program (P less than 0.05), adipose tissue lipoprotein lipase (LPL) activity was suppressed (P less than 0.05) by training during the first 24 days in PAR and RP depots only. Thereafter, PAR and RP LPL activities increased in TR animals (P less than 0.05) to reach values similar to SED at the end of the study. These results further establish the regionally specific response of adipose tissue metabolism to endurance training. They also suggest that, when fat cell triacylglycerol depletion reaches a smaller level, LPL activity could be involved in the process of stabilizing fat cell size.
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