yo-yo dieting

American  

noun

1. a repeated cycle of weight loss followed by weight gain.

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yo-yo dieting British  

noun

1. the practice of repeatedly going on slimming diets, and putting on weight in the interim

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Example Sentences

But, in hindsight, she realises this was the start of years and years of yo-yo dieting.

From BBC

"In my case, I believe my hair loss was due to many factors, yo-yo dieting, hormonal birth control, radical weight fluctuations over the years, my pregnancies, genetics, stress, and hair dyes and extensions," she wrote.

From Fox News

But this started nearly 10 years of nagging, yo-yo dieting, and generally hating myself.

From Slate

This stress contributes to higher levels of inflammation and oxidative stress, along with disordered eating behaviors — including comfort eating, yo-yo dieting and possibly eating disorders.

From Seattle Times

"I was the king of yo-yo dieting. I was my biggest during the years I was off TV so a lot of people didn't realize. My genetics make me gain weight easily, especially to high sugar/carb food. That being said, I believe calories also matter."

From Fox News