Does Intermittent Fasting Actually Work? Study Finds Meal Frequency Matters More Than Timing

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Does Intermittent Fasting Actually Work? Study Finds Meal Frequency Matters More Than Timing
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A recent six-year study published in the Journal of the American Heart Association found no association between the timing of the first meal to the last and weight loss. New research published in the Journal of the American Heart Association reveals that the frequency and portion size of meals ha

Intermittent fasting is a diet pattern where people alternate between periods of eating and fasting. It has gained popularity in recent years as a weight loss strategy, with proponents claiming it can help improve metabolism and reduce inflammation.

This study evaluated the association between time from the first meal to last meal with weight change. Nearly 550 adults from three health systems in Maryland and Pennsylvania with electronic health records were enrolled in the study. Participants had at least one weight and height measurement registered in the two years prior to the study’s enrollment period .

The research team created a mobile application, Daily24, for participants to catalog sleeping, eating, and wake-up time for each 24-hour window in real-time. Emails, text messages, and in-app notifications encouraged participants to use the app as much as possible during the first month and again during “power weeks” — one week per month for the six-month intervention portion of the study.

The average time from first to last meal was 11.5 hours; the average time from wake up to first meal measured 1.6 hours; the average time from last meal to sleep was 4 hours; the average sleep duration was calculated at 7.5 hours. Although the study found that meal frequency and total calorie intake were stronger risk factors for weight change than meal timing, the findings could not prove direct cause and effect, according to lead study author Di Zhao, Ph.D., an associate scientist in the division of cardiovascular and clinical epidemiology at Johns Hopkins Bloomberg School of Public Health.

According to the American Heart Association’s 2022 statistics, 40% of adults in the U.S. are obese; and the Association’s current diet and lifestyle

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