4 research outputs found
Impact of Olive Oil Supplement Intake on Dendritic Cell Maturation after Strenuous Physical Exercise: A Preliminary Study
Physical exercise is known to have a dose-dependent effect on the immune system and can result in an inflammatory process in athletes that is proportional to the intensity and duration of exertion. This inflammatory process can be measured by cell markers such as dendritic cells (DCs), which, in humans, consist of the myeloid DC (mDCs) and plasmacytoid DC (pDCs) subpopulations. The aim of this study was to measure DC differentiation to determine the possible anti-inflammatory effects, after intense aerobic effort, of the intake of a 25 mL extra-virgin olive oil supplement. Three healthy sports-trained subjects went through resistance exercise loads on two days separated by a week: on one day after active supplement intake and on the other day after placebo supplement intake. The results show that the highest increase (77%) in the percentage of mDCs as a proportion of pDCs was immediately after testing. Independently of the supplement taken, mature mDCs showed a decreasing trend between the test one hour after and 24 h after testing ended. Nevertheless, measured in terms of the coefficient of variation, only the decrease (46%) for extra-virgin olive oil supplementation was statistically significant (95% CI: 30-62%; p = 0.05). In conclusion, an extra-virgin olive oil supplement could reduce the inflammatory impact of intense aerobic effort and improve recovery at 24 h
Greixos i esports de resistència: avaluació d´estratègies de suplementació aguda amb à cids grassos
[cat] En els darrers anys s’està produint un increment en l’interès i nombre de participants en proves de resistència i ultra resistència. Aquest exercici d’alta intensitat i durada té uns grans requeriments de substrats energètics i també presenta conseqüències importants a nivell inflamatori. S’han revisat els estudis previs que han estudiat diferents estratègies nutricionals per augmentar el rendiment. Algunes d’aquestes estratègies han explorat la utilització de suplementació amb greixos amb l’objectiu d’estalviar les reserves de glucogen muscular, ja que aquests són el principal substrat energètic en aquests esports. La hipòtesi d’aquesta tesi és que una suplementació aguda amb greixos prèvia i durant la prà ctica d’esports de residència millora el rendiment i disminueix l’impacte inflamatori produït en exercicis amb grans requeriments energètics. L’objectiu principal és l’avaluació de la influència dels suplements rics en greixos en esforç de llarga durada i elevada intensitat. S’han realitzat quatre experiments. El primer, és un estudi de camp que avalua les repercussions sobre la funció cardiovascular d’una cursa de muntanya de llarga distà ncia. A partir de proves de laboratori, els tres estudis restants avaluen l’efecte de la suplementació rica en greixos i la seva influència en el rendiment, aixà com el seu efecte antiinflamatori en esforços d’alta intensitat i llarga durada. Realitzats els citats experiments, es demostra la transcendència del metabolisme dels lÃpids en esforços d’alta intensitat i llarga durada, aixà com la possibilitat d’utilitzar suplements naturals rics en greixos, ben tolerats i amb una clara influència positiva en el rendiment i en els efectes inflamatoris d’aquests tipus d’exercicis.[eng] In recent years, interest in endurance and ultra-endurance challenges has been growing, as has the number of people taking part in them. Such high-intensity, long-duration exercise has substantial energy substrate requirements and important inflammatory consequences. Previous studies on different nutritional strategies aimed at enhancing performance have been reviewed. Some of those studies explored the use of fat supplementation to save muscle glycogen stores, since the latter are the main energy substrate in these sports. The hypothesis of this thesis is that acute fat supplementation before and during endurance sports improves performance and reduces the inflammatory impact caused by exercises having substantial energy requirements. The aim is to evaluate the influence of supplements rich in fats on long-duration, high-intensity effort. Four experiments were conducted. The first was a field study evaluating the repercussions of a long-distance mountain race on cardiovascular function. Based on laboratory tests, the three other studies evaluated the effect of supplementation rich in fats and its influence on performance, as well as its anti-inflammatory effect in high-intensity, long-duration efforts. Having conducted the aforementioned experiments, the relevance of lipid metabolism in high-intensity, long-duration efforts is demonstrated, as is the possibility of using natural supplements rich in fats, which are well tolerated and have a clear positive impact on performance and on the inflammatory effects of these types of exercises
Effect of Almond Supplementation on Non-Esterified Fatty Acid Values and Exercise Performance
Several studies have investigated the effects of fat intake before exercise on subsequent substrate oxidation and exercise performance. While some studies have reported that unsaturated fatty acid supplementation slightly increases fat oxidation, the changes have not been reflected in the maximum oxygen uptake or in other performance and physiological parameters. We selected almonds as a fatty acid (FA) source for acute supplementation and investigated their effect on non-esterified fatty acid (NEFA) values and exercise performance. Five physically active male subjects (age 32.9 ± 12.7 years, height 178.5 ± 3.3 cm, and weight 81.3 ± 9.7 kg) were randomly assigned to take an almond or placebo supplement 2 h before participating in two cycling resistance training sessions separated by an interval of 7-10 days. Their performance was evaluated with a maximal incremental test until exhaustion. Blood samples collected before, during, and after testing were biochemically analysed. The results indicated a NEFA value average increase of 0.09 mg·dL−1 (95% CI: 0.05-0.14; p < 0.001) after active supplement intake and enhanced performance (5389 ± 1795 W vs. placebo 4470 ± 2053 W, p = 0.043) after almond supplementation compared to the placebo. The almond supplementation did not cause gastrointestinal disturbances. Our study suggests that acute almond supplementation 2 h before exercise can improve performance in endurance exercise in trained subjects
Efectos de la ingesta voluntaria de lÃquidos (agua y bebida deportiva) en corredores por montaña amateurs
Las carreras por montaña de 21 km y 1000 metros de desnivel, pueden suponer un riesgo si no se mantiene una adecuada reposición hÃdrica. Objetivo: Conocer los niveles de deshidratación y evaluar las diferencias entre una carrera con ingesta voluntaria de agua (CcA) y de bebida deportiva (CcB). Método: 18 sujetos de 31.9 (±2.8) años y %MG 10.53 (±2.8), completaron una CcA y una CcB. Se evaluó el efecto de CcA y CcB sobre cada variable; Peso (P), Masa Grasa (MG), Glucosa (GL), Lactato (LT), Tensión Arterial Sistólica (TAS) y Diastólica (TAD), Pulsaciones por Minuto (PPM) y Temperatura Timpánica (Tª). Estas fueron tomadas al inicio (T1) y al final (T2) de cada prueba. Los efectos se calcularon con la ANOVA Friedman. Las diferencias en las variables tiempo de carrera (TC), % de pérdida de peso (%PP) y lÃquido ingerido (LI), se evaluaron con la prueba de Wilcoxon. Todos los cálculos se realizaron con el SPSS versión 20.0 (IBM, Somers, NY, USA). Resultado: El % PP fue de 2,967 (± 0,969) y 2,883 (± 0,730), para CcA y CcB. En TC, %PP y LI no hay diferencias (p>.05) entre carreras. Para CcA en función del tiempo, son significativos (p.05) between races. Significant changes were found in P, %MG, GL, L, TAS and PPM between T1 and T2 in CcA condition. While only significant changes in P and PPM were stabilised between T1 and T2 in CcB condition. Conclusions: neither water or sport drink ingestion avoid trail-runners to reach a dehydrated state. However, dehydration effects seems to be more serious when only water is ingested.Les curses per muntanya de 21 km i 1000 metres de desnivell, poden suposar un risc si no es manté una adequada reposició hÃdrica. Objectiu: Conèixer els nivells de deshidratació i avaluar les diferències entre una carrera amb ingesta voluntà ria d'aigua (CcA) i de beguda esportiva (CcB)