Trying to catch up on some sleep on the weekend may not be beneficial as you may already be feeling the negative effects of lack of sleep.

The researchers monitored the volunteers’ health and performance using a variety of different tests on three different days during the period and found that after five days of deprived sleep, the volunteers were sleepier on both objective and subjective tests compared to baseline levels. The researchers also found that while the sleepiness went away after the extra sleep recovery period, their ability to pay attention had also deteriorated during the period and did not improve after the recovery.
“Two nights of extended recovery sleep may not be sufficient to overcome behavioral alertness deficits resulting from mild sleep restriction. This may have important implications for people with safety-critical professions, such as health-care workers, as well as transportation system employees (drivers, pilots, etc.) The long-term effects of a repeated sleep restriction/sleep recovery weekly cycle in human remains unknown”, the researchers wrote in their report.
Source-Medindia