The key role of cardiovascular exercise in keeping healthy and hearty has been confirmed in a couple of important studies. They point out the amount of time it takes you to run a mile is a great indicator of cardiovascular health and your danger of heart attack and stroke.
Reported in Red Orbit and elsewhere, two studies of this behavioral indicator of cardiovascular health, showed that for middle-aged men, the length of time required to run one mile (1,609 meters) predicted heart attack and stroke better than did blood pressure or cholesterol levels.
Faster times predict fewer heart and brain attacks. A 55 year old male who requires 15 minutes to walk/run a mile (only 4 miles per hour) faces a 30% chance of suffering cardiovascular disease. A man of the same age who can run a mile in just 8 minutes (7.5 miles per hour) faces far lower danger of cardiovascular disease, less than 10 percent.
One way to increase running speed is with interval training, brief bursts at higher speed. After warm up jogging, a common interval is one minute slow jogging speed followed by one minute high intensity running, then repeating the sequence up to 10 times. This writer has been experimenting with slow jog/fast walk for 90 seconds, interspersed with 30 seconds high speed. This rhythm seems well suited for a non-punishing work-out made plenty intense with the periods at high speed. These high speed intervals quickly boost heart rate and sweating, both goals of a good conditioning, fat-burning workout.
High levels of physical activity such as running seem to correspond with activation of the endocannabinoid regulatory system, the receptor based system also activated by the THC in cannabis. Indeed, the fabled “runner’s high” might be the result of this system, rather than (or in addition to) to endorphins. More about this in a future post.
Caution: For those poorly conditioned, increasing activity and especially trying to push up maximum speed can present some dangers. A consultation with your (fit) medical practitioner and taking a stress EKG test is a good precaution.
Caution: Being poorly conditioned and not participating in physical activity presents an enormous risk of cardiovascular disease, along with obesity, diabetes and a host of other diseases.