To give blood you must: 1  Be in general good health.  Be at least 17 years old. (If you are 16 you can donate with a CBC consent form signed by your parent). There is no upper age limit as long as you have no health restrictions.
Specific radiative intensity. Specific (radiative) intensity is a quantity used in physics that describes electromagnetic radiation. It is a term used in much of the older scientific literature. The present-day SI term is spectral radiance, which can be expressed in base SI units as W mâ2 srâ1 Hzâ1.
General Physical Activities Defined by Level of Intensity The following is in accordance with CDC and ACSM guidelines. Moderate activity+ 3.0 to 6.0 METs* (3.5 to 7 kcal/min) Vigorous activity+ Greater than 6.0 METs* (more than 7 kcal/min) Walking at a moderate or brisk pace of 3 to 4.5 mph on a level surface inside or outside, such as