Early rises have a lower risk of breast cancer, according to study

One study has argued that so-called "morning people" may have a reduced risk of breast cancer.

Researchers at the University of Bristol conducted research on the relationship between sleeping longer and breast cancer and found that the women who usually woke up earlier had a high 40-48% less risk of breast cancer than those who slept longer.

Researchers compiled data on over 100,000 women and asked them their preferences regarding mornings and evenings. And they found that those who were more likely to be former stigters or "larks" obviously had less chance of getting the disease.

The study also found that women who slept longer than the recommended seven-eight hours actually also increased the risk of breast cancer, by about 20%, per extra hour asleep.

The reasons why there is a variation in the risk of breast cancer between early riders and evening people is not yet clear.

It is believed that most of the population can be divided into two camps: nugget or early stigma, or "larks", as they have been given a nickname. Your natural body clock – or your circadian rhythm, as it is scientifically named – determines which category you fall into.

Nightworms tend to come up later and are more productive and energetic later in the evening. Morning people prefer to go up earlier, find themselves at the highest energy early in the day and are more tired of the evening.

University of Bristol researcher Dr Rebecca Richmond commented on the study saying that "Using genetic variants associated with human preference for morning or evening, sleep duration and insomnia … we investigated whether these sleep disorders have a causal contribution to the risk of developing breast cancer.

She was also keen to find out that it is not an easy way to reduce the risk of breast cancer if you are a night owl earlier. Dr Rebecca confessed that more work has to be done to determine why early stigters see such an advantage for their health.

"We would like to do further work to investigate the mechanisms underlying these results, as they estimate the estimates are based on questions related to morning or evening elections rather than actually whether people get up sooner or later in the day."

"In other words, changing your habits can not change the risk of breast cancer. It may be more complex than that."

So while it may be tempting to try to combat the risk by setting our alarm clock a bit earlier – it seems more work needed to determine whether it would be really beneficial.