Resistance exercise during the postprandial period lowers venous glucose concentrations in individuals with type 2 diabetes, but the impact of resistance exercise on interstitial glucose concentrations is not well understood. The objective of this study was to compare subcutaneous adipose tissue interstitial glucose and venous blood glucose concentrations during postprandial resistance exercise in patients with type 2 diabetes. Eleven individuals completed two trials in a random order including a no exercise (NoEx) and a postprandial resistance exercise trial (M-Ex). During the trials the individuals consumed a meal and either remained sedentary (NoEx) or performed a session of resistance training beginning 45 min after the meal (M-Ex) while interstitial and venous glucose concentrations were simultaneously measured. Venous glucose during exercise was ~11% lower (P=0.05) during M-Ex (8.0±0.5 mmol/L) compared to NoEx (9.0±0.5 mmol/L) whereas interstitial glucose during M-Ex (10.4±0.7 mmol/L) was not different compared to interstitial glucose during NoEx (10.1±0.7 mmol/L). Bland-Altman plots revealed that the difference (bias) between interstitial and venous glucose during exercise was over 2-fold greater during M-Ex (2.36±2.07 mmol/L) compared to NoEx (1.11±1.69 mmol/L). The mean (33.8±6.2 mmol/L) and median (34.7±6.3 mmol/L) absolute relative difference during exercise were 73% and 78% greater compared to the mean (19.5±4.1 mmol/L) and median (19.5±4.1 mmol/L) absolute relative difference during NoEx (P=0.04). Resistance exercise has unequal effects on glucose concentrations within different bodily compartments as exercise reduced venous glucose concentrations but not adipose tissue interstitial glucose concentrations in the abdominal region in individuals with type 2 diabetes.
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