The NFL player's union, or the NFL Players Association, is against subjecting players to blood-testing.
They believe the tests are far too invasive and discussion of testing should be withheld until a suitable urine test has been developed.
Currently there is no suitable urine test to check for the use of HGH and blood-testing would be the most accurate way of testing for the substance.
If approved, blood-testing could go into effect as early as next season.
Athletes have been tested at various events for the hormone including the 2008 Olympics, where blood-testing mostly targeted the use of HGH in Olympic athletes.
When properly used in athletics, HGH can help an athlete recover from an injury faster much like other medical steroids.
HGH is a naturally occurring hormone in the human body with highest secretion rates during childhood while the brain and body is growing. Many basketball players who grow up to be very tall usually have exhibited large quantities of HGH during childhood.
Growth hormone helps to increase calcium retention strengthening bone, increases muscle mass, increases protein synthesis, stimulates growth of internal organs and the immune system.
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