Resumen

PENAILILLO ESCARATE, Luis et al. Effects of omega-3 supplementation and high intensity interval training in physical performance, blood pressure and body composition in overweight individuals. Nutr. Hosp. [online]. 2016, vol.33, n.4, pp.848-855. ISSN 1699-5198.  https://dx.doi.org/10.20960/nh.380.

Background: High Intensity Interval Training (HIIT) has shown to increase oxidative capacity and maximum oxygen consumption (VO_2max) in different populations. On the other side, the consumption of Omega-3 fatty acids (O3) has positive effects on oxidative metabolism. Objective: To observe the effects of a combination of HIIT and O3 supplementation on parameters of physical performance, blood pressure, and body composition in overweight adults. Methods: 28 young, non-active, overweight individuals (22 ± 4 years; BMI = 25.8 ± 2.4 kg/m²) participated in the study. They were randomly assigned to four groups: an O3/HIIT (n = 7) which performed HIIT, 3 times per week, during six weeks and took 2 g of O3 supplement daily; a HIIT group (n = 7) whom performed HIIT protocol; an O3 group (n = 7) consumed 2 g of O3 supplement daily; and a control group (n = 7). VO_2max, maximum race speed, blood pressure, body fat percentage, and the sum of six skinfolds were measured at baseline and after the 6 week intervention. Results: Peak oxygen consumption increased more in the O3/HIIT group (+10.9%) when compared to the HIIT group, O3 group, and control group. Maximum race speed increased only the O3/HIIT group (+7.1%) and HIIT group (+11.9%). Systolic blood pressure decreased the most in the O3 group (-6.8%), compared to O3/HIIT, HIIT, and control. Lastly, fat percentage decreased in every group (-19.2% in O3/HIIT group, -20.2% in HIIT group, and -15.2% in O3 group), when compared to the control group. Conclusion: The results observed in VO_2peak in the O3/HIIT group, suggest an augmented effect when HIIT and O3 supplementation are combined during six weeks. Furthermore, fat percentage improved in all intervened groups when compared to control group.

Palabras clave : Physical activity; Polyunsaturated fatty acids; Blood pressure; Maximum aerobic capacity; Fat mass.

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