To keep muscles strong, the 'garbage' has to go

To keep muscles strong, the 'garbage' has to go  
http://www.eurekalert.org/pub_releases/2009-12/cp-tkm112309.php 
 
"In order to maintain muscle strength with age, cells must rid themselves of the garbage that accumulates in them over time, just as it does in any household, according to a new study in the December issue of Cell Metabolism, a Cell Press journal. In the case of cells, that waste material includes spent organelles, toxic clumps of proteins, and pathogens."