A recent study by University of Arizona Health Sciences found that oversleeping during off days may cause social jet lag and increase the risk of heart disease by up to 11 per cent.
Social jet lag is a term coined by Dr Till Roennberg of the University of Munich Institute of Medical Psychology in Germany, referring to different sleep patterns on off days and work days.
The research was said to involve 984 adults, ages to 22 to 60.
In the statement, researchers also mentioned social jet lag appeared to cause poor health, bad moods, increased sleepiness and fatigue.
The lead author and undergraduate research assistant in the university's Sleep and Health Research programme Sierra B.
Forbush said in a statement, "It was particularly surprising that these effects were independent of how much sleep people got and any insomnia symptoms.
These results indicate that sleep regularity, beyond sleep duration alone, plays a significant role in our health."