Recommended Sleep Times:

Young Adults: 18-25 years old

7-9 hours

Adults: 26-64 years old

7-9 hours

Older Adults: 65+

7-8 hours

Reference:

Hirshkowitz M, Whiton K, Albert SM, et al. National Sleep Foundation's sleep time duration recommendations: methodology and results summary. Sleep Health. 2015;1(1):40-43. doi:10.1016/j.sleh.2014.12.010