April 14: Vaisakhi (Sikhism, 2022); Tamil New Year and other New Year festivals in South and Southeast Asia (2022); Day of the Georgian Language (1978); N’Ko Alphabet Day in West Africa (1949)
The white-headed petrel (Pterodroma lessonii), also known as the white-headed fulmar, is a species of seabird in the petrel family, Procellariidae. About 400 mm (16 in) in length, the species occurs in the Southern Hemisphere, and breeds alone or in colonies in burrows dug among tussocks and herbfields on subantarctic islands. This white-headed petrel in flight was photographed off the eastern coast of the Tasman Peninsula in Tasmania, Australia.
Types of exercise can also be classified as dynamic or static. ‘Dynamic’ exercises such as steady running, tend to produce a lowering of the diastolic blood pressure during exercise, due to the improved blood flow. Conversely, static exercise (such as weight-lifting) can cause the systolic pressure to rise significantly, albeit transiently, during the performance of the exercise.
Most people can increase fitness by increasing physical activity levels.
Early motor skills and development is also related to physical activity and performance later in life. Children who are more proficient with motor skills early on are more inclined to be physically active, and thus tend to perform well in sports and have better fitness levels. Early motor proficiency has a positive correlation to childhood physical activity and fitness levels, while less proficiency in motor skills results in a more sedentary lifestyle.
The type and intensity of physical activity performed may have an effect on a person’s fitness level. There is some weak evidence that high-intensity interval training may improve a person’s VO2 max slightly more than lower intensity endurance training.
The beneficial effect of exercise on the cardiovascular system is well documented. There is a direct correlation between physical inactivity and cardiovascular disease, and physical inactivity is an independent risk factor for the development of coronary artery disease. Low levels of physical exercise increase the risk of cardiovascular diseases mortality.
Biomarkers of inflammation such as C-reactive protein, which are associated with chronic diseases, are reduced in active individuals relative to sedentary individuals, and the positive effects of exercise may be due to its anti-inflammatory effects. In individuals with heart disease, exercise interventions lower blood levels of fibrinogen and C-reactive protein, an important cardiovascular risk marker.
There is low-quality evidence for an effect of aerobic physical exercises on anxiety and serious adverse events in adults with hematological malignancies.
Aerobic exercise induces short- and long-term effects on mood and emotional states by promoting positive affect, inhibiting negative affect, and decreasing the biological response to acute psychological stress.
Continuous aerobic exercise can induce a transient state of euphoria, colloquially known as a “runner’s high” in distance running or a “rower’s high” in crew, through the increased biosynthesis of at least three euphoriant neurochemicals: anandamide (an endocannabinoid),
Preliminary evidence from a 2012 review indicated that physical training for up to four months may increase sleep quality in adults over 40 years of age.
