Saturday newspapers are read for an average of 60 minutes, while the Sunday papers are read for an average of one hour 10 minutes, according to the report.
The NRS began surveying readers on the time they spent reading print publications back in January this year and the latest data covers the six-month period to June.
About 250 magazines were measured by the NRS in the survey and each title was read on average for a total of 50 minutes.
Just over 60% of magazine readers spent 30 minutes or more reading a particular title, with 34% spending an hour or more.
However, the time spent reading print titles differed dramatically in some cases between individual print brands.
The Daily Telegraph was read on average for one hour 28 minutes on a Saturday and News International's The Times was read on average for one hour 19 minutes. However, these times were over double that spent by consumers reading The Sun, whose readers devoted an average of just 36 minutes to the red-top newspaper.
Readers of The Sunday Times dedicated more of their Sunday to the title than any other national newspaper. On average it was read for one hour 42 minutes, while its fellow News International title and biggest selling Sunday paper News of the World, was read for just 45 minutes.
Guardian Media Group's The Observer was read on average for one hour 29 minutes, The Sunday Telegraph was read for an average of one hour 25 minutes, the Mail on Sunday was read for one hour six minutes and the Independent on Sunday for an average of one hour four minutes.
Roger Pratt, managing director of the NRS, said: "The introduction of the Time Spent Reading element to the survey reveals just how robust the print medium is.
"This first data set, which will become a regular part of future releases, demonstrates that consumers are committing substantial time to print media despite increasingly busy lifestyles and the proliferation of media channels."