People who nap once or twice a week could have a lower risk of incident cardiovascular disease (CVD) events, suggests a new research published this week in Heart.
For the study, researchers assessed the relationship of napping frequency and average nap duration with fatal and non-fatal CVD events among 3,462 people in Switzerland from the CoLaus cohort study.
While previous research looking at the impact of napping on cardiovascular risk has had mixed results, the authors of this latest study say many of these studies have failed to consider napping frequency.
Most participants (58%) reported no napping in the previous week, 19 per cent reported one to two naps, 12 per cent had three to five naps and 11 per cent had six to seven naps.
During a median follow-up of 5.3 years, 155 fatal and non-fatal CVD events occurred. In the crude model, the authors observed a J curved relationship between nap frequency and cardiovascular events. However, in the adjusted analysis, those napping one to two times weekly had a 48 per cent lower risk of CVD events compared with non-napping subjects and no association was found for more frequent napping or napping duration.
The authors concluded that nap frequency may help explain the discrepant findings regarding the association between napping and CVD events.