Adequate sleep is needed to lose weight..there are changes in the hormonal levels of gherlin and leptin at night. These hormones regulate weight. If there is not enough sleep, the hormones can't do their work.
Gherlin stimulates appetite and levels will fall during sleep. Leptin does the opposite and tells us to stop eating after a meal. Leptin levels rise during sleep...
Researchers at the Walter Reed Army Medical did a study on nurses. They found that short sleepers had an average BMI of 28.3. Long sleepers had a lower average BMI, 24.5.When BMI hits 25, a person is considered overweight.
A better study was a joint project between Stanford and the University of Wisconsin -- about 1,000 volunteers reported the number of hours they slept each night. Doctors then measured their levels of ghrelin and leptin, as well as charted their weight.
The result: Those who slept less than eight hours a night not only had lower levels of leptin and higher levels of ghrelin, but they also had a higher level of body fat. What's more, that level of body fat seemed to correlate with their sleep patterns. Specifically, those who slept the fewest hours per night weighed the most.
Hours of sleep needed depends on your age
Ages 3 to 6: between 10 and 12 hours of sleep
Ages 6 to 9: about 10 hours of sleep
Ages 9 to 12: about 9 hours of sleep
About 9 hours of sleep per night. Teens have trouble getting enough sleep not only because of their busy schedules, but also because they are biologically programmed to want to stay up later and sleep later in the morning, which usually doesn’t mesh with school schedules.
For most adults, 7 to 8 hours a night appears to be the best amount of sleep.
Your workout would not be rendered completely worthless without adequate sleep. Your workout however would achieve a lot more with a good nights sleep. Recovery occurs during sleep. With adequate recovery, you are able to work harder at your next workout. With adequate recovery your muscles won't be as sore. If you want to develop muscle, remember that muscles grow during sleep. Without adequate sleep, the immune system will also suffer.
A few signs of sleep deprivation
difficulty waking up in the morning
poor performance in school, on the job, or in sports
difficulty making decisions
falling asleep during work or class
feeling especially moody or irritated