Exercise and vascular function in sedentary lifestyles in humans

Area of Science:

• Physiology
• Cellular Biology
• Vascular Health

Background:

• Sedentary lifestyles disrupt cellular redox balance and mitochondrial function.
• This leads to increased oxidative stress, endothelial dysfunction, and vascular inflammation.
• Key molecular changes include increased NADPH oxidase activity and reduced nitric oxide (NO) bioavailability.

Purpose of the Study:

• To review the detrimental vascular effects of a sedentary lifestyle.
• To explore the benefits of regular and intermittent exercise on vascular health.
• To compare the efficacy of different exercise intensities on NRF2 activation.

Main Methods:

• Review of scientific literature on sedentary behavior, oxidative stress, and exercise physiology.
• Analysis of molecular mechanisms linking lifestyle, cellular stress, and vascular function.
• Examination of signaling pathways such as NRF2-KEAP and their modulation by exercise.

Main Results:

• Sedentary behavior promotes oxidative stress, endothelial dysfunction via LDL-C oxidation and reduced NO, and eNOS uncoupling.
• Exercise, particularly through reactive oxygen species (ROS), activates the NRF2 pathway to combat oxidative stress.
• High-intensity intermittent exercise shows a greater NRF2 activation potential by reducing KEAP levels compared to moderate exercise.

Conclusions:

• Sedentary lifestyles pose significant risks to vascular health through oxidative stress.
• Regular exercise is crucial for mitigating these risks by activating protective cellular pathways.
• High-intensity intermittent exercise may offer superior benefits for sedentary individuals in alleviating oxidative stress and improving vascular function.