publicspace.net announced the immediate availability of the Macintosh break timer application MacBreakZ 4.1 on Wednesday. The updated version adds a new stretch manager that lets you choose which stretches to include in your exercise routine, adds a new menu bar icon, and more. MacBreakZ 4.1 is priced at US$29.95, and is available for download at the publicspace.net Web site. The update is free for registered version 4.1 users.