MacBreakZ is a personal ergonomic assistant which monitors our keyboard and mouse activity and helps us structure our computer use in a healthy and constructive manner, thus preventing computer-related injuries from developing. The main applications for MacBreakZ are to prevent repetitive strain injuries (RSI) and promote healthy and pain-free computing and to aid the recovery from repetitive strain injuries. MacBreakZ achieves this by helping us re-structure our computer usage: it monitors user activity and suggests appropriate times for recovery and micro-breaks; provides a range of stretching exercises designed to relieve muscular tension and improve static posture and it provides ergonomic information on how to use our computer in a healthy manner