High-intensity interval training (HIIT) enhances skeletal muscle oxygen delivery and utilization but data are limited regarding fiber-specific adaptations in humans. We examined the effect of 18 sessions of HIIT (10 × 60-sec cycling intervals at ~90% HRmax , interspersed by 60-sec of recovery) over 6 weeks on markers of microvascular density and oxidative capacity in type I and II fibers in hea...

The aim of this study was to determine the effects High-intensity interval training (HIIT) on quality life in healthy young people (YNG) and older adults (OLD)and its correlation with physical health status (anthropometric parameters lower limb functionality) YNG (21 ? 2 years, BMI 26.37 2.69 n = 12) OLD (67 5 27.16 3.04 groups underwent 12weeks HIIT. Before after HIIT, anthropometric assessmen...

High-intensity interval training (HIIT) is a popular method for optimising sports performance and, more recently, improving health-related parameters. The inclusion of hypoxia during HIIT can promote additional gains compared with normoxia. However, reductions in the effort intensities same performed normoxia have been reported. Studies reported that adding periods inter-effort recovery (IEH) e...

H igh-intensity aerobic interval training (HIIT) is a popular strategy for improving cardiorespiratory fitness and health, as well as reducing body fat levels. A standard HIIT protocol involves alternating bouts of both highand low-intensity exercise to increase the amount of high-intensity work performed during an acute bout of training. High-intensity intervals are typically performed above t...

BACKGROUND Evidence of the efficacy of high-intensity, low-volume interval training (HIIT-low volume) in treating insulin resistance (IR) in patients with metabolic disorders is contradictory. In addition, it is unknown whether this effect is mediated through muscle endocrine function, which in turn depends on muscle mass and fiber type composition. Our aims were to assess the efficacy of HIIT-...

Background: Limited research surrounding sex differences in fatigue and performance after high intensity interval training (HIIT) exists the field setting. While lab-based protocols provide a controlled environment, physiological mechanisms of response competitive athletes are best measured by time-trial (TT). Few studies, however, have investigated TT while controlling for menstrual cycle (MC)...

High-intensity interval training (HIIT) consists of short intervals of exercise at high intensity intermitted by intervals of lower intensity and is associated with improvement of body composition and metabolic health in adults. Studies in overweight adolescents are scarce. We conducted a randomized controlled trial in overweight adolescents to compare acceptance and attendance of HIIT with or ...

The purposes of our study were to examine (1) Rh B glycoprotein (Rhbg) and Rh C glycoprotein (Rhcg) expressions in mouse skeletal muscle; and (2) the effect of 6-week training on Rhbg and Rhcg expressions. The levels of Rhbg and Rhcg expressions were much higher in the soleus (Sol) than in the plantaris (Pla) or gastrocnemius (Gas). Immunofluorescence microscopy demonstrated that Rhbg colocaliz...

Due to the current obesity epidemic in the United States, there is growing interest in efficient, effective ways to increase energy expenditure and weight loss. Research has shown that high-intensity exercise elicits a higher Excess Post-Exercise Oxygen Consumption (EPOC) throughout the day compared to steady-state exercise. Currently, there is no single research study that examines the differe...