regulates regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum Any process that modulates the rate, frequency or extent of release of sequestered calcium ion into cytosol by the sarcoplasmic reticulum, the process in which the release of sequestered calcium ion by sarcoplasmic reticulum into cytosol occurs via calcium release channels. GO:0010880 biological_process release of sequestered calcium ion into cytosol by sarcoplasmic reticulum regulation of release of sequestered calcium ion into cytosol biological regulation