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In contrast, women walking at high walking intensities (up to 30% above the AT) lost progressively more body fat as training proceeded (Figure 1). After 30 weeks of training fat omega 3 fatty acids losses approximated 5% of body weight. Figure 1: Changes in body fat Figure 2: Changes in mean level (by DEXA) as a function of nocturnal plasma omega 3 fatty acids leptin concentration duration and intensity of training as a function of training intensity In addition, we measured plasma leptin concentration, as this endocrine messenger released by adipocytes is thought to serve as a negative feedback reflecting level of omega 3 fatty acids fatness on the energy regulatory system. This research is a collaboration with Dr. Josephine Kasa-Vubu and is also supported by a Clinical Research Partnership (UM Medical School). Training intensity had no effect on plasma leptin concentration (which was proportional to body fat level) until 30 weeks of training at which point there was a significant negative correlation between plasma leptin concentration and training intensity (R=-0.715,
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