Even at rest, the average heart easily pumps over five litres of blood throughout the body every min transporting oxygen, nutrients, hormones to every part of the body while removing cellular waste products. This marvellous pump system is supported by a complex blood vessel system. These blood vessels are the body’s road network that allows blood to flow quickly and efficiently from the heart to every region of the body and back again. Arteries carrying blood away from the heart and veins carrying blood to the heart.
The endothelium lines the entire Circulatory (heart) system all the way to the interior of the heart, where it is called the endocardium. High levels of lipids stick to this lining and overtime build up to form blockages in blood flow (plaque). Plaque is made up of fat, cholesterol, calcium and other substances found in the blood. Over time, plaque hardens and narrow your arteries, limiting the flow of oxygen-rich blood to your organs and other parts of your body. This puts the heart under more pressure to work as efficiently and has to pump faster leading to high blood pressure or hyertention. This can lead to serious problems, including heart attack, stroke or even death.
A high fat diet can cause these plaques to form. Exercise has been shown to Attenuate or reverse these abnormalities in the lipid (fats) profiles. Cardiovascular conditioning is essential to maintaining a healthy heart muscle and to having the endurance to meet our daily activity needs.
Therefore, cardiovascular exercise leads to significant reductions inthe risk for Cardiovascular disease and an improvement inthe overall quality of ones life. Physical activity keeps the body strong, builds endurance and stamina, helps to keep joints looseand flexible and makes us feel better all round.
Interval training can be performed in various combinations of work/rest intervals. Intervals involve short bursts of intense activity interspersed with lighter activity or rest periods. Trying to find a specific block of 30 to 60 minutes to exercise can be challenging. Adequate activity can be obtained in longer sessions of less intense activities(such as 30-40 minutes of wheeling oneself in a wheelchair) or in shorter sessions of more strenuous activities(such as 20 minutes of wheelchair basketball).