Whole Grain Products, Fish and Bilberries Alter Glucose and Lipid Metabolism in a Randomized, Controlled Trial: The Sysdimet Study

Due to the growing prevalence of type 2 diabetes, new dietary solutions are needed to help improve glucose and lipid metabolism in persons at high risk of developing the disease. Herein we investigated the effects of low-insulin-response grain products, fatty fish, and berries on glucose metabolism and plasma lipidomic profiles in persons with impaired glucose metabolism.Altogether 106 men and women with impaired glucose metabolism and with at least two other features of the metabolic syndrome were included in a 12-week parallel dietary intervention. The participants were randomized into three diet intervention groups: (1) whole grain and low postprandial insulin response grain products, fatty fish three times a week, and bilberries three portions per day (HealthyDiet group), (2) Whole grain enriched diet (WGED) group, which includes principally the same grain products as group (1), but with no change in fish or berry consumption, and (3) refined wheat breads (Control). Oral glucose tolerance, plasma fatty acids and lipidomic profiles were measured before and after the intervention. Self-reported compliance with the diets was good and the body weight remained constant. Within the HealthyDiet group two hour glucose concentration and area-under-the-curve for glucose decreased and plasma proportion of (n-3) long-chain PUFAs increased (False Discovery Rate p-values <0.05). Increases in eicosapentaenoic acid and docosahexaenoic acid associated curvilinearly with the improved insulin secretion and glucose disposal. Among the 364 characterized lipids, 25 changed significantly in the HealthyDiet group, including multiple triglycerides incorporating the long chain (n-3) PUFA.The results suggest that the diet rich in whole grain and low insulin response grain products, bilberries, and fatty fish improve glucose metabolism and alter the lipidomic profile. Therefore, such a diet may have a beneficial effect in the efforts to prevent type 2 diabetes in high risk persons.ClinicalTrials.gov NCT00573781

L2 Motivation and Digital Technologies

This chapter uses Self Determination Theory (Deci & Ryan, 1985) as a lens through which to review research describing motivational influences associated with digital technologies. Motivational effects are traced to pleasure generated in technology use (intrinsic motivation), and to the satisfaction of three basic psychological needs that generate and sustain high-quality motivation; the manner in which digital technologies enable learners connect to others (relatedness), experiences of agency and independence in using the L2 in digital spaces (autonomy), and the generation of linguistic self-confidence (competence). Adopting an interdisciplinary position, it is suggested that in addition to understanding the effects of these “psychological nourishments” (Rigby & Ryan, 2017), there is need for broader conceptualizations of motivational influences. Three concepts with particular relevance to L2 motivation are identified: the development of L2 vision through learners’ engagement with digital media, influences stemming from appraisals of verisimilitude when a digital technology forms a part of learning, and the effects of personal validation seeking when L2 media is created in networked environments