Bilirubin is a breakdown product of hemoglobin. Red blood cells contain hemoglobin, which is broken down into the components "heme" and "globin." Heme is converted into bilirubin. Albumin carries bilirubin to the liver, where most of it is conjugated with a glucuronide before it is excreted in the bile. Conjugated bilirubin is called "direct bilirubin;" unconjugated bilirubin is called "indirect bilirubin." Total bilirubin equals direct bilirubin plus indirect bilirubin.
Rest Harder Than You Work Out
If you overtrain -- meaning you don't allow your body to recuperate adequately between training sessions -- your circulating testosterone levels can plunge by as much as 40 percent, according to a study at the University of North Carolina. The symptoms of overtraining are hard to miss: irritability, insomnia, muscle shrinkage, joining the Reform Party. To avoid overtraining, make sure you sleep a full eight hours at night, and never stress the same muscles with weight-lifting movements two days in a row.
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