A new study found that people who complain about poor sleep are also more likely to drink a lot of soda. The study suggests that sleep could be improved with reduction of one’s intake of sweetened and caffeinated beverages. The researchers looked at data from nearly 19,000 adults. Those participants who slept for five or less hours on average were 21 percent more likely to drink soda or energy drinks. Those who routinely slept for six hours consumed 11 percent more of these beverages, compared to those who got more sleep.