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Acute effects of weight lifting on plasma adiponectin in trained versus untrained individuals

Adiponectin, an adipose‐derived hormone, exerts cardio‐protective effects. Short‐term resistance training augments adiponectin, which may confer protection against coronary heart disease (CHD). Whether these increases in adiponectin occur in response to acute resistance training is not yet known. Moreover, whether this effect varies between trained versus untrained individuals also remains unclear. Accordingly, we examined the effects of acute resistance training on plasma adiponectin levels in trained versus untrained men and women. Subjects (n = 35) were categorized into 4 groups: 1) sedentary, 2) weight lifters, 3) runners, or 4) weight lifter/runners. All subjects underwent a single progressive leg press weight lifting session. At baseline, adiponectin, age, BMI, and percent body fat were similar between groups. Plasma adiponectin increased by 29 ± 12% (P = 0.01) in the weight lifter/runners post training. There was a trend towards augmented adiponectin for sedentary subjects and weight lifters (20 ± 12%, P = 0.09 and 24 ± 14%, P = 0.10, respectively), but not for the runners (15 ± 13%, P = 0.77). There were no significant changes in HDL cholesterol or C‐reactive protein (CRP) concentrations post exercise. Changes in adiponectin were not correlated to changes in HDL cholesterol or CRP. Thus, adiponectin levels may be increased by acute resistance training in both untrained and trained individuals.