9 Will be able to bed period and sleep 8 hours - Physical repairs take place in the body when h2o is asleep between 10pm and 4am. After 2am the immune and repair energies tend to focused on mental repair which lasts until arising. In a nutshell, going to bed after 12pm will not allow yourself to recover physically, so ensure you enter bed by 10 - 10.30pm definitely five days a 7 days.