scholarly journals The Influence of a Single Bout of High-Intensity Interval Exercise on Postprandial Lipemia and Glycemia

2017 ◽  
Vol 49 (5S) ◽  
pp. 273
Author(s):  
James Rowe ◽  
Stephen Decker
Keyword(s):  
High Intensity ◽  
Postprandial Lipemia ◽  
Interval Exercise ◽  
Single Bout ◽  
High Intensity Interval

Different responses of apoptotic, inflammatory and heat shock protein gene expression to a single bout of high intensity interval exercise between physically active and inactive men

2021 ◽  
Author(s):  
Selma Arzu Vardar ◽  
Zeynep Banu Doğanlar ◽  
Oktay Kaya ◽  
Pınar Tayfur ◽  
Necdet Sut ◽  
...  
Keyword(s):  
Heat Shock ◽  
High Intensity ◽  
Pcr Analysis ◽  
Mrna Levels ◽  
Physically Active ◽  
Hsp70 Mrna ◽  
Interval Exercise ◽  
Single Bout ◽  
Group 5 ◽  
High Intensity Interval

High mechanical load of muscles may induce muscular apoptosis on the one hand and adaptation to exercise on the other. This study aimed to explore whether changes of circulatory levels of inflammation, apoptosis and heat shock proteins (HSPs) mRNA following single bout of high intensity interval exercise (HIIE) differs between physically active (PA) and inactive (PI) men. Nine PA and nine PI (peak VO2 2.6±0.4 vs. 2.0 ± 0.2 L.min-1) healthy men (age: 28.7+/-6.3 vs. 30.2+/-4.5 years and BMI: 2.6±2.1 vs. 23.3±2.8 kg.m-2) performed HIIE comprising 4 repeats of a Wingate test (load:0.050 kg.kg-1 body weight). Blood samples were collected before exercise, 5 min and 24 h after HIIE for measuring mRNA of inflammation markers IL6 and TNFα, apoptosis markers including Bcl-2, Bax, and HSP27, HSP60, HSP70, HSP90 using quantitative real-time PCR analysis. Post-HIIE IL6, TNFα and HSP60 were higher in the PI than the PA group 5 min after exercise (p=0.003, ES=1.59; p=0.007, ES=1.59 and p=0.027, ES=1.10 respectively). HSP70 acutely increased only in the PA group (p=0.024, ES=1.20). The increase in Bcl-2 (p=0.047, ES=1.08) and Bax (p=0.024, ES=1.20) levels were higher in the PI group 5 min after HIIE. The present study indicated that the response of inflammatory, apoptosis and HSP gene expressions to HIIE in blood of healthy male volunteers strongly depends on their level of regular physical activity. Novelty • Blood IL-6 and HSP60 mRNA levels following high intensity exercise may indicate metabolic stress. • Increased blood HSP70 mRNA in physically active men may show an alternative apoptosis suppression pathway.

scholarly journals High-intensity interval exercise attenuates but does not eliminate endothelial dysfunction after a fast food meal

2018 ◽  
Vol 314 (2) ◽  
pp. H188-H194 ◽  
Author(s):  
Wesley J. Tucker ◽  
Brandon J. Sawyer ◽  
Catherine L. Jarrett ◽  
Dharini M. Bhammar ◽  
Justin R. Ryder ◽  
...  
Keyword(s):  
Heart Rate ◽  
Endothelial Dysfunction ◽  
High Intensity ◽  
Fast Food ◽  
Postprandial Lipemia ◽  
High Energy ◽  
Active Recovery ◽  
Maximum Heart Rate ◽  
Interval Exercise ◽  
High Intensity Interval

We investigated whether two different bouts of high-intensity interval exercise (HIIE) could attenuate postprandial endothelial dysfunction. Thirteen young (27 ± 1 yr), nonexercise-trained men underwent three randomized conditions: 1) four 4-min intervals at 85–95% of maximum heart rate separated by 3 min of active recovery (HIIE 4 × 4), 2) 16 1-min intervals at 85–95% of maximum heart rate separated by 1 min of active recovery (HIIE 16 × 1), and 3) sedentary control. HIIE was performed in the afternoon, ~18 h before the morning fast food meal (1,250 kcal, 63g of fat). Brachial artery flow-mediated dilation (FMD) was performed before HIIE ( baseline 1), during fasting before meal ingestion ( baseline 2), and 30 min, 2 h, and 4 h postprandial. Capillary glucose and triglycerides were assessed at fasting, 30 min, 1 h, 2 h, and 4 h (triglycerides only). Both HIIE protocols increased fasting FMD compared with control (HIIE 4 × 4: 6.1 ± 0.4%, HIIE 16 × 1: 6.3 ± 0.5%, and control: 5.1 ± 0.4%, P < 0.001). For both HIIE protocols, FMD was reduced only at 30 min postprandial but never fell below baseline 1 or FMD during control at any time point. In contrast, control FMD decreased at 2 h (3.8 ± 0.4%, P < 0.001) and remained significantly lower than HIIE 4 × 4 and 16 × 1 at 2 and 4 h. Postprandial glucose and triglycerides were unaffected by HIIE. In conclusion, HIIE performed ~18 h before a high-energy fast food meal can attenuate but not entirely eliminate postprandial decreases in FMD. This effect is not dependent on reductions in postprandial lipemia or glycemia.NEW & NOTEWORTHY Two similar high-intensity interval exercise (HIIE) protocols performed ∼18 h before ingestion of a high-energy fast food meal attenuated but did not entirely eliminate postprandial endothelial dysfunction in young men largely by improving fasting endothelial function. Both HIIE protocols produced essentially identical results, suggesting high reproducibility of HIIE effects.

Effect of high-intensity interval exercise on basal triglyceride metabolism in non-obese men

2013 ◽  
Vol 38 (8) ◽  
pp. 823-829 ◽  
Author(s):  
Elena Bellou ◽  
Faidon Magkos ◽  
Tonia Kouka ◽  
Eirini Bouchalaki ◽  
Dimitra Sklaveniti ◽  
...  
Keyword(s):  
Energy Expenditure ◽  
Aerobic Exercise ◽  
Endurance Exercise ◽  
High Intensity ◽  
Density Lipoprotein ◽  
Peak Oxygen Consumption ◽  
Interval Exercise ◽  
Fasting Plasma ◽  
Single Bout ◽  
High Intensity Interval

A single bout of high-intensity interval aerobic exercise has been shown to produce the same or greater metabolic benefits as continuous endurance exercise with considerably less energy expenditure, but whether this applies to very low density lipoprotein (VLDL) metabolism is not known. We sought to examine the effect of a single bout of high-intensity interval aerobic exercise on basal VLDL-triglyceride (TG) kinetics 14 and 48 h after exercise cessation to determine the acute and time-dependent effects of this type of exercise on VLDL-TG metabolism. Eight healthy sedentary men (age, 23.6 ± 6.1 years; body mass index, 23.1 ± 2.2 kg·m−2, peak oxygen consumption (V̇O2peak), 36.3 ± 5.5 mL·kg−1·min−1) participated in three stable isotopically labeled tracer infusion studies: (i) 14 h and (ii) 48 h after a single bout of high-intensity aerobic interval exercise (60% and 90% of V̇O2peak in 4 min intervals for a total of 32 min; gross energy expenditure ∼500 kcal) and (iii) after an equivalent period of rest, in random order. Fasting plasma VLDL-TG concentration was 20% lower at 14 h (P = 0.046) but not at 48 h (P = 1.000) after exercise compared with the resting trial. VLDL-TG plasma clearance rate increased by 21% at 14 h (P < 0.001) but not at 48 h (P = 0.299) after exercise compared with rest, whereas hepatic VLDL-TG secretion rate was not different from rest at any time point after exercise. We conclude that high-intensity interval exercise reduces fasting plasma VLDL-TG concentrations in non-obese men the next day by augmenting VLDL-TG clearance, just like a single bout of continuous endurance exercise. This effect is short-lived and abolished by 48 h after exercise.

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