NEW ORLEANS — Keeping track of the foods you eat is an important strategy for weight loss, but continuing to monitor what you eat is also important to prevent regaining that weight. Now, a new study finds that stopping food tracking is linked to re-gaining weight. In order to prevent re-gaining weight, people should make an effort 4 months after starting a diet to refocus on food tracking, according to the study, presented here today (Nov. 13) at the American Heart Association's annual meeting called the Scientific Sessions. The researchers found that people tended to stop dietary monitoring after about 4 months, and that this was followed by regaining weight, said Qianheng Ma, a public health researcher at the University of Pittsburgh and the lead author of the study. [Here's Why It's So Hard to Maintain Weight Loss] The effects of food tracking, or "dietary self-monitoring," on weight loss have been well-studied, and the technique is a key component of what researchers call the "standard behavioral treatment" for people who want to lose weight and keep it off, Ma told Live Science. This type of treatment is the most effective non-medical approach to weight loss, according to the study. In the study, the researchers looked at data from 137 people who had participated in a one-year weight loss intervention called EMPOWER. The majority of the people in the study were white women. The participants were, on average, 51 years old and had a BMI of 34.1 (people with a BMI of 30 or higher are generally considered obese). The people in the study were asked to weigh themselves regularly with a digital scale that uploaded data in real time and to monitor their diet using a smartphone app. Although everyone in the study initially lost weight, nearly three-quarters of the people in the study ultimately regained some of that weight. In addition, 62 percent of the participants stopped tracking what they were eating at some point during the study. The researchers found that a greater percentage of the people who regained weight had stopped tracking what they ate, compared with those who were able to maintain their weight. [Special Report: The Science of Weight Loss] The average time that people to tracked their diet before they stopped was 126 days,— in other words, they were about four months into their diet when they stopped, Ma told Live Science. It's unclear why food tracking stopped at this point, she added. People did not begin gaining weight immediately after they stopped tracking what they ate, the researchers noted. Rather, people started to gain weight, on average, about 2 months after they stopped tracking their food, the study found. Now that the researchers have identified the point at which people tend to stop tracking their food, they intend to study whether strategically reminding people to keep tracking will help them to keep the weight off, Ma said.
Monday, 14 November 2016
Marijuana Use May Weaken Your Heart Muscle
Credit: Jan Havlicek/Shutterstock.com
Marijuana use may be linked to a weakened heart muscle, a new studyfinds. Researchers found that people who used marijuana were twice as likely to later develop a heart condition called transient ventricular regional ballooning (TVRB) than those who did not use marijuana. TVRB is a form of cardiomyopathy, which is a sudden weakening of the heart muscle that can mimic symptoms of a heart attack. The symptoms can include chest pain, dizziness and shortness of breath, but the condition is often temporary. The most surprising finding from the study was that the marijuana users in the study were the opposite of the people that TVRB tends to strike in several ways, said Dr. Amitoj Singh, a co-author of the study and the chief cardiology fellow at St. Luke’s University Health Network in Pennsylvania. The condition tends to develop in post-menopausal women, he said. In the study, the marijuana users who developed TVRB were 44 years old, on average, and 36 percent were men. Among the non-marijuana users in the study who developed TVRB, the average age was 66, and just 8 percent were men. [10 Amazing Facts About Your Heart] None of the people in the study who had used marijuana died from the heart condition after being admitted to the hospital, so the study does not link marijuana use to deaths, Singh told Live Science. However, people "should be aware that certain cardiovascular abnormalities and complications can occur from marijuana use," he said. In the study, the researchers looked at data from the Nationwide Inpatient Sample database, which includes data from community hospitals in 44 states. The researchers found 33,343 admissions for TVRB between 2003 and 2011, and that 210 of these patients had either reported that they had used marijuana, or had a marker of the drug in their urine. After the researchers took into account a number of factors linked with TVRB, such as depression and anxiety disorders, the link between marijuana use and TVRB held, they said. It isn't clear how the link may work. TVRB has only recently been recognized as a health condition, Singh said. Some research shows that that high levels of stress hormones are linked to the development of the condition. Moreover, studies have shown that stress hormone levels in the urine increase in people who smoke marijuana, he said. [7 Foods Your Heart Will Hate] The researchers noted that their study was retrospective, and cannot establish that marijuana maybe be a cause of TVRB. Furthermore, the researchers did not have information on how long patients had been using marijuana, how much of the drug they used, or how that marijuana was ingested. (Marijuana can be smoked, or consumed in edible products, such as brownies or candies.) Singh emphasized that he does not discount studies that have shown some of marijuana's positive effects of people's health. However, the drug needs much more study, he told Live Science. "We don't know everything about marijuana."