A new study has revealed that six out of 10 New Zealanders are unhappy due to lack of sleep. Majority of Kiwis reportedly feel miserable or depressed because they think they don't get enough sleep.

Local sleep support company Tru2U commissioned a survey to find out about New Zealanders' sleeping habits. According to the findings, majority or 65 percent of Kiwi women said they struggle to be happy after lack of sleep compared with 54 percent of the men.

In a press release, the study suggested that most New Zealanders do not sleep enough to function at the peak of their physical and mental capacity. More than half of the respondents or 58 percent feel they are not well-rested. About 56 percent find it difficult to sleep at night.

However, the dangers of not getting enough sleep are reportedly not just about feeling miserable the next morning. The new research suggested that people belonging to the Generation Y were more likely to struggle with sleep than other age groups. Scientists have linked the lack of sleep to several health problems including the high likelihood of obesity, diabetes and heart disease. The study has also found that about 72 percent of Kiwis only sleep five to seven hours every night. Only 24 percent said they get enough sleep with eight hours or more.

Simon Musgrave from Tru2u said several scientific studies have shown that lack of sleep can cause mood swings and irritability. Some people who lack sleep are vulnerable to stress and negativity. The recent study revealed that New Zealanders, especially the women, are coping to maintain a positive mood.

Musgrave believes that seven hours of sleep may be enough for some, but getting less than eight hours of shuteye every night is not advisable, 3 News reported. He said most people need at least eight hours of sleep to be in their best self. He added that Kiwis are "active" and busy, so sufficient sleep is crucial to help the body recover and heal. Musgrave recommends that New Zealanders should have regular sleeping habits and sleep, at the very least, seven hours every night.

For questions/comments regarding the article, contact the writer at r.su@ibtimes.com.au.