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Encouraging effects of a short-term, adapted Nordic diet intervention on skin microvascular function and skin oxygen tension in younger and older adults.

Nutrition 2018 May
OBJECTIVES: The microvascular benefits of regional diets appear in the literature; however, little is known about Nordic-type diets. We investigated the effects of a short-term, adapted, Nordic diet on microvascular function in younger and older individuals at rest and during activity.

METHODS: Thirteen young (mean age: 28 y; standard deviation: 5 y) and 15 older (mean age: 68 y; standard deviation: 6 y) participants consumed a modified Nordic diet for 4 wk. Laser Doppler flowmetry and transcutaneous oxygen monitoring were used to assess cutaneous microvascular function and oxygen tension pre- and postintervention; blood pressure, body mass, body fat percentage, ratings of perceived exertion, and peak heart rate during activity were examined concurrently.

RESULTS: Axon-mediated vasodilation improved in older participants (1.17 [0.30] to 1.30 [0.30]; P < 0.05). Improvements in endothelium-dependent vasodilation were noted in both young (1.67 [0.50] to 2.03 [0.62]; P < 0.05) and older participants (1.49 [0.37] to 1.63 [0.39]; P < 0.05). Reduced peak heart rate during activity was noted in older participants only (36.5 [8.9] to 35.3 [8.5]; P < 0.05) and reduced body fat percentage in young participants only (young = 27.2 [8.3] to 25.2 [8.8]; P < 0.05). No other variables reached statistical significance; however, trends were observed.

CONCLUSIONS: We observed statistically significant improvements in microvascular function, peak heart rate, and body composition. An adapted Nordic diet might improve microvascular health.

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