Dietary self-monitoring less disagreeable than perceived

One of the best predictor of success to losing weight is monitoring and recording calorie and fat intake throughout the day. However dietary self-monitoring is widely viewed as so unpleasant and time-consuming, many would-be weight-losers can't muster the will power to do it.

A new research, to be published in the March issue of Obesity suggests that the reality of dietary self-monitoring may be far less disagreeable than the perception.

The study found that after six months of monitoring their dietary intake, the most successful participants in an online behavioural weight-loss programme spent an average of just 14.6 minutes per day on the activity.

Programme participants recorded the calories and fat for all foods and beverages they consumed, as well as the portion sizes and the preparation methods.

Conducted by researchers at the University of Vermont and the University of South Carolina, the study is the first to quantify the amount of time that dietary self-monitoring actually takes for those who successfully shed those extra kilos.

Lead author of the study Jean Harvey said, "People hate it; they think it's onerous and awful, but the question we had was: How much time does dietary self-monitoring really take?" adding, "The answer is, not very much."

Harvey and her colleagues looked at the dietary self-monitoring habits of 142 participants in an online behavioural weight control intervention. For 24 weeks, participants met weekly for an online group session led by a trained dietitian.

Furthermore, volunteers logged their daily food intake online, in the process leaving behind a record of how much time they spent on the activity and how often they logged in.

Participants who lost 10 per cent of their body weight - the most successful members of the cohort - spent an average of 23.2 minutes per day on self-monitoring in the first month of the programme. By the sixth month, the time had dropped to 14.6 minutes.

Notably, what predicted the most weight-loss success was not the time spent monitoring but the frequency of log-ins, confirming the conclusions of earlier studies.

Harvey said, "Those who self-monitored three or more time per day, and were consistent day after day, were the most successful."

Harvey attributes the decrease in time needed for self-monitoring to participants' increasing efficiency in recording data and to the web program's progressive ability to complete words and phrases automatically after just a few letters were entered.

The study's most important contribution, Harvey said, may be in helping prospective weight-losers set behavioural targets.