Crash dieting (n., kraSH dī-iting): extreme caloric restriction, oftentimes coupled with excessive exercise (namely steady-state cardio). Time-frame can range anywhere from a few days to several months.

People who crash diet are in a hurry to drop the most amount of fat in a short time frame. Crash dieting can take multiple forms, including but not limited to: consuming only a select few specific foods (eg. only crackers and lemons), engaging in bizarre rituals, and mixing together foods that suddenly possess magical power.

Crash Dieting Syndrome (CDS) typically starts in the teen years but can affect individuals at any age. This syndrome is much more common with females than with males, though recent years has seen an increasing number of males falling victim to this trend.

With crash dieting, patients may find it hard to enjoy life, engage in social affairs, and focus on tasks. Some may become afflicted just once in their lifetime, while others will have it time and time again under the false pretense that there is any long-term success to be gained.


There are numerous causes for CDS. More often than not, there is a defining event in an individual’s life that trigger CDS behavior. Popular moments include:

  • seeing an aesthetically unpleasant photo of oneself
  • not being able to see one’s own genitals without a mirror
  • having trouble fitting in
    The ominous scale.
    The ominous scale.

    to last year’s jeans

  • stepping on the scale after a long period of time and seeing a much higher number than expected
  • a visit to the doctor

Additionally, upcoming special occasions, such as weddings and high school reunions, can instigate CDS. With a deadline quickly approaching, individuals can feel pressured to speed up the dieting process and resort to shedding the weight off as quickly as possible.

Those who struggle with patience may be more prone to CDS. They are accustomed to instant gratification and give up easily when results are not immediately visible. Despite knowing that slow, reasonable steps to fat loss is more sustainable in the long run, individuals convince themselves that they will not fall prey to the common side effects of CDS. This is hardly ever the case.


  1. Muscle loss. When slashing calories, it is not uncommon for people from the general population to drastically reduce protein intake as well. Coupled with lack of a sound weight training program, this creates a recipe for severe muscle wasting. Any hard-earned muscle will quickly atrophy, leaving a smaller yet doughy version of one’s former self.
  2. Energy levels. They will plummet. Drastically. Individuals may experience difficulty sleeping soundly and may also struggle getting out of bed in the mornings. Dependence on stimulants such as caffeine may spike (that’s a pun) to combat feelings of lethargy.
  3. Mood changes. Any trace of one’s original bubbly, chirpy personality may degenerate into witch mode. Constantly obsessing over thoughts of food and all the things one cannot consume may stir sudden outbursts of anger and unsolicited bitch slaps to unknowing passerby. Diva mode: activated.
  4. Rebound & metabolic damage. One of the more severe symptoms of CDS. Most of the time, individuals who crash diet may experience short-lived success before rapidly piling the weight back on.

Reboundis defined as rapid weight gain at an alarming rate via an individual’s behavior, normally involving regular episodes of binge eating on formerly forbidden foods. It is not uncommon for people under tremendous pressure (say, competitors getting ready for a show or celebrities constantly in the spotlight) to have their bodyweight fluctuate upwards of 40 to 50 pounds. Patients report feelings of panic, lack of control, and an overwhelming need to consume as much food as possible within a short timeframe. Individuals may battle with rebound for anywhere between a few months to several years. Many end up looking worse than they did before they started dieting in the first place and frequently make false promises to themselves to “try again tomorrow.” The damage is primarily psychological. Well-known examples of yo-yo dieters who unsuccessfully crash diet time and time again: Oprah Winfrey, Janet Jackson, Kirstie Alley, Britney Spears, and Kelly Clarkson.


Oops, she did it again!
 Oops, she did it again!


Metabolic damage is a related yet distinct effect of CDS. Unlike rebound, metabolic damage has more serious physiological implications. Severe, prolonged caloric restriction with hours of daily cardio can make for a turbulent environment within the body, knocking proper hormone levels off-kilter, for one. Despite eating properly and exercising at appropriate levels, the body refuses to respond - and may even continue to gain fat. Issues may include, depressed metabolic rate (eg. gaining weight at 900 calories per day), decreased testosterone levels, and chronically elevated cortisol levels.  Individuals, confused, may further slash their dietary intake but doing so will inevitably exacerbate their situation.

Metabolic damage may take months, and oftentimes years, to fix. The medical repercussions should never be overlooked. The emotional toll inflicted upon victims of metabolic damage is never worth any trophy, magazine cover, or photoshoot. Click here for more in-depth information or the video below to watch coach Scott Abel and Kevin Weiss talk aboot the realities of metabolic damage.

  1. Living under the illusion that crash dieting is a quick fix. Crash dieting seems too good to be true - and that’s because it is. Many people engage in crash dieting with the mindset that once the diet is over, they can resume their lives and fall back onto their previous habits. Oftentimes, individuals are shocked to learn that healthy eating and exercise behaviors must be practiced day in and day out in order to maintain (and improve upon) results. Shedding one habit at a time and replacing it with a healthier one - say, broccoli instead of potato chips as a side - and realizing that more and faster is not better can aid in the pursuit of the coveted physique. When individuals can embrace the fact that being in shape entails a permanent lifestyle change, their chance of success increase dramatically.


Finding out that someone you know has been afflicted with CDS may induce excessive eye-rolling and head-banging. But you can help - to an extent.

All people with CDS can benefit from having a serious discussion with a knowledgeable individual about the dangers of crash dieting. Point them to this article and encourage them to seek nutritional counseling. Help them understand that having their skin turn orange (see: carrot diet) is not cool and that any progress made will likely be temporary.

If you have CDS, try not to resist treatment. Keep an open mind when speaking with others. Do your research - learn how to set up your dieting calories, put together a sound training program, and accept that hunger is a normal and expected part of the fat loss progress.

Keep in mind, however, that people will not change unless they themselves are willing to change, no matter how much you may wish otherwise. People may just have to continue on their fast track to failure with crash dieting and learn from experience what they should not have done in the first place. It will hurt, but they will learn.


There are certainly smart, calculated ways to go about this - but the truth is that the large majority of the dieting population will not approach fat loss in this manner. And if they do, they will likely twist and bend the rules, mashing and molding it until it’s no longer recognizable.

With that said, provided that individuals have adequate knowledge of proper diet and training, crash dieting can be a safe option when approached with the right mindset. Say you’re preparing for a major role in a movie and you’re getting paid the big bucks to be on-screen in a skintight outfit and you only have a month to get ready. Or you’re a big-time model who booked a last-minute photoshoot. Circumstances like these are the exception and not the rule.

Possibly one of the only universally fitness-approved crash diet concepts out there is the Protein Sparing Modified Fast (PSMF), popularized by Lyle McDonald. Like the name suggests, the diet places a heavy emphasis on protein and allows for minimal calorie intake while still providing all the essential nutrients. Complete with training guidelines and a thorough explanation of the why’s and how’s, the Rapid Fat Loss Handbook covers everything you need to know about crash dieting.

But be warned: great mental strength is required. If you’re not disciplined or motivated enough, this is not for you. Go back and read this article from the beginning.

Final parting words: [Tweet "coax the body into responding; don’t force it."]

Be wise, my friends.