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Luis Peñailillo Escarate1, Karen Mackay Phillips, Natalia Serrano Duarte
1Laboratorio de Ciencias del Ejercicio. Escuela de Kinesiología. Facultad de Medicina. Universidad Finis Terrae. Santiago de Chile. hzbinden@uft.cl.
Nutricion Hospitalaria
|August 31, 2016
Summary
Combining high-intensity interval training (HIIT) with omega-3 (O3) supplementation significantly enhances aerobic capacity in sedentary young adults. Both interventions also contributed to reductions in body fat percentage.
Area of Science:
- Exercise Physiology
- Nutritional Biochemistry
- Cardiovascular Health
Background:
- High-intensity interval training (HIIT) and omega-3 (O3) fatty acid supplementation independently improve aerobic capacity, oxidative metabolism, and cardiovascular function.
- Sedentary lifestyles and overweight conditions in young adults are associated with suboptimal physical performance and cardiovascular health.
Purpose of the Study:
- To investigate the combined effects of HIIT and O3 supplementation on physical performance, blood pressure, and body composition.
- To compare the effects of combined O3/HIIT intervention against HIIT alone, O3 supplementation alone, and a control group in overweight, sedentary young adults.
Main Methods:
- A randomized controlled trial involving 28 overweight, sedentary young adults (age 22 ± 4 years, BMI 25.8 ± 2.4 kg·m-2).
- Participants were assigned to four groups: O3/HIIT, HIIT, O3, or CONTROL for six weeks.
- Interventions included 3x weekly HIIT sessions and/or 2g/day O3 supplementation. Measurements included peak oxygen consumption (VO2peak), maximal velocity (Vmax), systolic and diastolic blood pressure (SBP/DBP), and body fat percentage.
Main Results:
- The O3/HIIT group exhibited the greatest increase in VO2peak (+10.9%) compared to other groups.
- Vmax increased in both O3/HIIT (+7.1%) and HIIT (+11.9%) groups.
- SBP decreased most significantly in the O3 group (-6.8%).
- All intervention groups (O3/HIIT, HIIT, O3) showed significant reductions in body fat percentage compared to the CONTROL group, with O3/HIIT (-19.2%) and HIIT (-20.2%) showing the largest decreases.
Conclusions:
- Combined HIIT and O3 supplementation demonstrates a synergistic effect, significantly enhancing maximal aerobic capacity.
- Both HIIT and O3 supplementation, individually and in combination, are effective in reducing body fat percentage in sedentary, overweight young adults.
- Omega-3 supplementation alone may offer distinct benefits for blood pressure reduction.
