I work in a 28 bed rehab ward in Dunedin, New Zealand. We do the standard 8 hour shifts but also do some short shifts to cope with peak times.
In addition to our RN's and EN's we also use rehabilitaiton assistants. The RN's and EN's do the 8 hour shifts but some of our rehab assistants do the short shifts. We have an 8-1 and a 5-9 to cope with the demands of getting people up in the morning, dealing with mealtimes and helping people to bed.