WEEK 12- Fad and fictions

How does the dieting cartoon illustrate a misconception about dieting?

The cartoon says: "I'm on that new diet. I can eat anything but calories."

- Food necessarily contributes energy; calorie avoidance cannot be detached from actual food choices.

- The joke illustrates unrealistic, oversimplified dietary rules.

DIAGRAM ON SLIDE 3

What is a diet, and how does it differ from a weight-loss diet?

Diet: The kinds of food that a person, animal or community habitually eats.

Dieting practices can include:

- Fasting for long periods

- Restricting the total quantity of food

- Avoiding certain types of food

Weight-loss diet: Any plan specifying what, when and/or how much to eat for weight control.

Lecturer explanation:

Habitual eating is different from restrictive "going on a diet"; fine-tuning an athlete's usual routine is preferable to removing entire food groups or following restrictive trends such as 75 Hard.

Why do athletes pursue diets or physique changes?

1. Self-perceived ideal appearance for their sport

2. Socio-cultural pressure for thinness or an "ideal" body composition

3. Perceived performance advantages:

- Higher power-to-weight ratio

- Movement against gravity (worded "horizontal movements" on slide)

- Aerodynamics

- Aesthetics

- Making a weight category

Lecturer explanation:

A pole vaulter, for example, needs power, strength and control rather than simply minimal body mass; performance should guide decisions.

What sporting-organisation resources were shown for preventing body-image pressure and disordered eating?

- Swimming Australia: Performing in Lycra — Environment and Language Guide, with disordered-eating prevention/management guidance

- Australian Ballet: Body Image and Disordered Eating Guidelines — A Framework for Action and Prevention of Eating Disorders

- Australian Institute of Sport (AIS): Disordered Eating in High Performance Sport guidance

These encourage supportive language and environments instead of compulsory, unrealistic physique targets.

DIAGRAMS ON SLIDES 6-7

Which four popular dietary approaches and ratings were shown in the athlete-diets graphic?

- Intermittent fasting: 2/5

- Caveman diet: 1/5

- Juice cleanse: 1/5

- Gut-health diet: 3/5

Lecturer explanation:

Footballers attempting these to meet skinfold targets were contrasted with consistent fuelling, regular meals and realistic expectations.

DIAGRAM ON SLIDE 8

Why is a positive relationship with food especially important for athletes?

- Athletic life is 24/7 and may last many years; food can become a reward or source of control.

- Unsafe weight-loss methods are used to manipulate physique (O'Connor et al., 2014).

- Risks include short- and long-term physical harm, psychological effects and performance decrements.

- Rigid "cheat day" rules and cutting practices can undermine long-term habits.

Should skinfolds be a primary goal in an athlete weight-management plan, and what energy-deficit example was given?

- Health and performance are primary; skinfolds can be optional, secondary feedback rather than a selection cut-off.

- The lecture cites an approximately 2,100 kJ (500 kcal) daily deficit for gradual change (Jakicic et al., 2001).

- Preserve training carbohydrate, regular protein, and healthy fats.

Lecturer explanation:

Carbohydrate requirements differ; examples were approximately 4-5 versus 6-7 g/kg/day depending on the athlete. Monitor individual performance and response.

Which nutrition-information sources and percentages were reported in the athlete environmental scan?

Vazquez-Espino et al. (2022), sports-team athletes:

- Dietitians: 57%

- Physios/coaches: 53%/49% (as displayed)

- Internet: 38%

- Peers: 21%

- Magazines: 10%

- Scientific journals: 8%

- Books: 6%

Key point: Athletes receive guidance from professionals as well as peers, internet and marketing; source quality matters.

DIAGRAM ON SLIDE 12

What diet brands and programmes were listed in the first collection of popular diets?

Jenny Craig; Tony Ferguson; WeightWatchers; Lite n' Easy; Kate Morgan; Dr Atkins; The Zone Diet; The South Beach Diet; Slim Forever; Sugar-Busters; The Great Australian Diet; The Liver Cleansing Diet; The CSIRO Total Wellbeing Diet; The Ornish Diet; The Truth About Abs; FatLoss4-Idiots; Trim-a-weigh; The Cabbage Soup Diet; SureSlim; Celebrity Slim; Slim Fast; Optifast; Eat Right for Your Type; The Cereal Diet; The Raw Food Diet; The Genotype Diet; Herbalife; The Montignac Method; The Lemon Detox Diet; Three-Day Diet; The Magazine Editor's Diet; The Best Life Diet; The Ultimate New York Body Plan; The Low GI Diet.

The names illustrate the breadth of diet marketing rather than endorsement of any plan.

What further commercial and popular diet names were listed in the lecture?

Dr Phil Diet; YOU: On a Diet; The Biggest Loser; Skinny Bitch; Eat Right for Your Metabolism; The Carbohydrate Addict's Diet; The Apple Cider Vinegar Diet; The Supermodel Diet; Eight Weeks to Optimum Health; The DASH Diet; Anti-Estrogenic Diet; Allen Carr's Easyweigh to Lose Weight; The Mayo Clinic Diet; The Anne Collins Diet; Betty Baxter; Fat Blaster; GutBusters; NutriSystem; The Banana Diet; Kick-start Soup Diet; Slimmm; Xndo; The New Glucose Revolution; The McDougall Program for Maximum Weight Loss; The Three Hour Diet; The Velocity Diet.

Lecturer explanation:

Diet programmes can recur under new branding; the old blood-type diet was one example.

Which additional popular diets did the lecture list, and what was the overall point of showing so many?

The Cambridge Diet; The 90/10 Diet; The Volumetrics Weight Control Plan; The 5-Factor Diet; Ultra Lite; The Grape Cure; BodyTrim; The Gabriel Method; The Acai Berry Diet; The Wall Street Diet; The Beverly Hills Diet; The Dukan Diet; The Paleo Diet; Somersizing Diet; Fit for Life; The Cactus Diet; Fat Free Forever; Licence to Eat; The Fat Smash Diet; The French Don't Diet Plan; The Ultimate Tea Diet; Cohen's Lifestyle Clinic; The Grapefruit Diet; The Pritikin Diet; The Omega Plan; The 2 Day Diet.

Slide caption: "84 and still counting".

Key principle: Short-term energy restriction is common across diets, but name recognition is not evidence of durable benefit.

How did the example diets compare in daily energy, carbohydrate, protein and fat?

Per-day values: Calories; carbohydrate g (% energy); protein g (% energy); fat g (% energy).

- Typical American: 2,200; 275 (50%); 82.5 (15%); 85 (35%)

- Atkins induction: 1,152; 13 (5%); 102 (35%); 75 (59%)

- Atkins ongoing: 1,627; 35 (9%); 134 (33%); 105 (58%)

- Atkins maintenance: 1,990; 95 (19%); 125 (25%); 114 (52%)

- Carbohydrate Addict's: 1,476; 87 (24%); 84 (23%); 89 (54%)

- Sugar Busters!: 1,521; 176 (46%); 89 (23%); 44 (26%)

- Weight Watchers: 1,462; 207 (57%); 73 (20%); 42 (26%)

- Ornish: 1,273; 258 (81%); 48 (15%); 13 (9%)

Values are approximate examples and percentages may not sum to 100%. Diets vary sharply in macronutrients but often lower total energy.

DIAGRAM ON SLIDE 18

What claims characterise so-called magic diets and products?

Often prescriptive and restrictive (Cardwell, 2012). Claims may include:

- Removing toxins

- Making the body more alkaline

- Converting fat into body fuel

- Being sugar-free

- Being chemical-free

- Containing "fat metabolisers/mobilisers"

The lecture encourages critical scrutiny of these claims rather than accepting marketing language.

What does chitosan claim to do, and what effect did the cited study report?

Claim: Bind dietary fat in the gut so it passes undigested in faeces, reducing digestion/absorption of fat.

Gades & Stern (2002) estimate:

- Only 42 kJ (10 calories) saved per day

- Approximately the energy expended in a 2-minute walk

Conclusion: A trivial effect compared with the advertised fat-blocking promise.

DIAGRAM ON SLIDE 20

Which protein-focused product trends did the lecture highlight for athletes?

- Rokeby high-protein milk versus flavoured milk

- Protein bars

- Cottage cheese

- Protein-labelled ham

- Protein-enriched rice

- Protein-enriched pasta

Evaluate whether a product meaningfully improves intake or convenience, or merely carries a price premium.

How did Rokeby Protein Smoothie and Masters chocolate flavoured milk compare?

Rokeby Dutch Chocolate Protein Smoothie, 425 mL:

- Energy: 1,280 kJ

- Protein: 30 g

- Carbohydrate: 27.2 g

- Fat: 6.4 g; saturated fat: 4.7 g

- Total sugars: 25.1 g; lactose: 2.1 g

- Calcium: 833 mg

Masters Choc Flavoured Milk, 600 mL:

- Energy: 1,458 kJ

- Protein: 19.2 g

- Carbohydrate: 42.6 g

- Fat: 10.8 g; saturated fat: 7.2 g

Both can be useful for recovery. An athlete needing carbohydrate as well as protein may benefit from either; plain high-protein milk plus flavouring may cost less.

DIAGRAM ON SLIDE 22

What nutrition and ingredients were shown for Carman's Dark Choc & Cranberry Protein Bar?

Per bar:

- 824 kJ (197 Cal)

- Protein 10.5 g

- Total fat 10.7 g; saturated fat 2.2 g

- Carbohydrate 13.4 g; sugars 9.2 g

- Dietary fibre 2.6 g

Ingredients include nuts (26%), seeds (11%), isolated soy-protein crisps, dried fruit and cocoa.

Lecturer explanation:

Ingredients contribute nutrients beyond the protein claim; the lecturer considered it a nutrient-contributing snack.

DIAGRAM ON SLIDE 23

How does the Carman's Cinnamon Scroll Protein Bar compare with the Dark Choc & Cranberry bar?

Cinnamon Scroll, per bar:

- 760 kJ (182 Cal)

- Protein 11.1 g

- Total fat 7.9 g; saturated fat 3.8 g

- Carbohydrate 16.1 g; sugars 11.3 g

- Dietary fibre 0.8 g

- Includes protein blend and 18% peanuts

Comparison with Dark Choc & Cranberry:

- Similar protein: 11.1 vs 10.5 g

- Less fibre: 0.8 vs 2.6 g

- More saturated fat: 3.8 vs 2.2 g

- More sugar: 11.3 vs 9.2 g

Lecturer explanation:

The Cinnamon Scroll bar was treated more as an occasional fun food rather than automatically superior due to its protein label.

DIAGRAM ON SLIDE 24

What did the cottage-cheese product comparison demonstrate about protein marketing and price?

Bulla Dairy Low-Fat Cottage Cheese Original:

- 200 g; $4.80; $24/kg

Coles Low-Fat Creamed Cottage Cheese:

- 500 g; $6.00; $12/kg

Example protein panel:

- 12 g per 100 g serving

- Ordinary versus protein-labelled varieties were approximately 11.9 versus 12 g protein/100 g.

Conclusion: Check protein per 100 g and unit price; "high-protein" branding need not mean more protein.

DIAGRAM ON SLIDE 25

What protein-enriched ham, rice and pasta products were shown, and what question should athletes ask?

- Primo Protein Double Smoked Leg Ham: 19 g protein per serve

- SunRice Protein+ Brown Rice with Collagen: 10 g protein

- Vetta Smart Protein Penne

Ask whether added protein meets a genuine need. Rice and pasta already supply useful carbohydrate; additional protein may be relevant for some plant-based athletes but is not inherently necessary.

DIAGRAM ON SLIDE 26

What dieting prevalence figures were reported in Australia and the US?

Australia:

- 92% of young women reported dieting at least once

- 44% of middle-aged women reported dieting at least once

US Midwestern workers (Jeffrey et al., 1991):

- 47% of men

- 75% of women

Reported dieting at some stage.

Slide asks: "What is the weight-loss industry worth?"

Correct answer not stated in the provided lecture material.

What long-term weight regain, dropout and adherence figures were reported for popular diets?

- ⅓-⅔ of weight regained within 1 year

- Almost all weight regained within 5 years (1993 study cited)

- 42% dropout at 1 year

- Remaining participants self-rated adherence at only 3-4/10 after 12 months (Dansinger et al., 2005)

Conclusion: Short-term loss and sustainable adherence are different outcomes.

What did Dansinger et al. (2005) find when comparing Atkins, Zone, Weight Watchers and Ornish over one year?

- Little/no difference in weight loss between these diet groups at 1 year in the cited lecture comparison

- Only around 25% of participants adhered after 1 year

- Graph plots weight loss (kg) by diet; bars differ modestly and do not establish a "perfect diet"

Lecturer emphasis:

There is no single best named diet when adherence is poor.

DIAGRAM ON SLIDE 29

What additional long-term weight regain findings were reported?

- Many approaches produced initial 5-10% body-mass loss in the first 6 months

- Approximately ⅔ regained lost weight or more within 4-5 years

- Dieting was described as a consistent predictor of future weight gain in several studies

- A cited 2-year comparison found formal weight-loss-programme participants gained significantly more weight than nonparticipants (Tomiyama et al., 2007)

These are reported associations from cited studies, not proof that every diet causes later weight gain.

What is GLP-1, and what are its physiological actions described in the lecture?

GLP-1 = glucagon-like peptide 1, a naturally occurring hormone released with food intake.

- Brain: increases fullness, decreases hunger

- Heart: increases anti-inflammatory mechanisms; lowers blood pressure

- Muscle: increases glucose use

- Stomach: prolongs gastric emptying and gut transit

- Pancreas: increases insulin release and insulin-producing cells; reduces glucagon release

- Taste: increases sensitivity

Based on the slide summary citing Holst (2007).

What are GLP-1 receptor agonists, and which medicine names were given?

GLP-1 receptor agonists act on GLP-1-associated receptors and can increase insulin secretion and reduce appetite.

Examples named on the slide:

- Mounjaro

- Wegovy

- Ozempic

The lecture considers effects on athletes, especially appetite suppression and nutritional sufficiency.

What possible GLP-1 benefits and unanswered psychosocial risks were summarised?

Emotions:

- Finding: less emotional eating short term

- Unclear: emotional compensation shifting to other outlets

Mental health:

- Finding: improved short-term self-perception

- Unclear: depression/suicidality risk

Body image:

- Finding: more body checking

- Concern: perpetuation of stigma and shame

Disordered eating:

- Potential help in bulimia nervosa (BN) or binge-eating disorder (BED)

- Concern: restrictive eating disorders could be masked

Addiction:

- Possible help for substance addiction

- Evidence primarily short-term

Cost and representation:

- Expensive ($$)

- Higher exclusion rates of minorities in studies

Lecturer explanation:

Athlete-specific evidence is emerging; discuss medical, food-intake, muscle/strength and mental-health implications with a sports physician.

DIAGRAM ON SLIDE 33

What was the lecture's overall conclusion about branded weight-loss diets?

- No single option is a magic solution for everyone.

- Some diets, particularly low-carbohydrate approaches, may show short-term success.

- Beyond about 6 months, popular diets generally perform poorly for weight-loss maintenance and adherence.

- Individualised, sustainable habits matter more than a brand.

What three broad reasons did the lecture give for deprivation diets being difficult to sustain?

1. The body fights against them (physiological adaptation)

2. The brain fights against them (craving and restriction psychology)

3. The day-to-day environment fights against them (food cues and access)

The three forces can reinforce one another.

How does the lecture's furnace analogy explain the body's response to restriction?

- With plenty of food, the metaphorical metabolic furnace turns up; more energy is available to burn.

- With scarce food/famine, the furnace turns down as the body conserves energy.

- Evolutionary efficiency helped people survive food shortages.

- The slide also notes weight loss can occur without meaningful slowing of metabolism if well planned and appropriately timed.

Lecturer explanation:

Adequate carbohydrate for training and protein for lean tissue can be incorporated into a gradual plan.

Why can deliberately forbidding enjoyable foods intensify cravings?

- Repeated "I must not eat that" thoughts may increase desire.

- Restriction may move from "no" to "maybe" to eventual overconsumption.

- A diet centred on denying favourite foods is likely to be temporary.

Figure:

Diet mindset — wants ice cream, considers it forbidden, substitutes fruit/yoghurt/almonds/shake, finally eats all the ice cream.

Food freedom — wants ice cream, eats some to satisfaction, continues with life.

DIAGRAM ON SLIDE 39

What six negative food-mindset patterns did the lecture identify?

1. Guilt

2. Compensation

3. "Good versus bad" or "right versus wrong" foods

4. Quitting foods

5. "Eating clean"

6. Earning food

These can damage an athlete's relationship with eating.

How were guilt, compensation, moralising and earning food illustrated using bacon?

- Guilt: "I ate bacon and ruined everything."

- Compensation: "I must run an extra kilometre or eat less next meal."

- Good/bad: "Bacon is toxic or wrong."

- Quitting: "I must stop eating bacon to be healthy."

- Eating clean: "Bacon is dirty, so I cannot eat it."

- Earning food: "I ate well this week, so I earned bacon."

Lecturer explanation:

Eating can be placed in context without moral judgement.

What positive food-language messages did the lecturer promote?

- "You can fuel your body without quitting anything."

- "My food. My body. My choice."

- "Eating is an opportunity to nourish my body & my mind."

- "Food is fuel and food is fun."

Replace guilt and perfectionism with autonomy, flexibility and nourishing habits.

DIAGRAM ON SLIDE 42

What is an obesogenic environment, and how can it undermine restrictive diets?

An environment encouraging overconsumption through:

- Constant food availability and convenience

- Smells of food

- Visual food cues

- Advertising and expensive commercial marketing

- Social and takeaway eating occasions

Lecturer explanation:

Help athletes navigate the environment with practical, enjoyable, nutrient-rich choices rather than expecting perfect avoidance.

What eight factors make sustained weight loss difficult according to the lecture?

1. Unrealistic expectations

2. Major lifestyle changes / undoing years of habits

3. Deprivation and resistance

4. Misinformation from internet, media or marketing

5. Poor planning

6. Setbacks

7. Metabolic reductions with weight loss

8. Psychological factors

Flexible planning is more realistic than all-or-nothing perfectionism.

What six warning signs help identify a fad diet?

1. Eliminates one or several whole food groups

2. Allows only a very narrow food list

3. Promises large, rapid weight loss

4. Requires buying expensive branded foods/supplements

5. Cites testimonials as its "evidence"

6. Makes recommendations contrary to health guidelines

DIAGRAM ON SLIDE 45

Which social-media accounts did the lecturer mention, and what was the educational takeaway?

- @alimiles_dietitian — adolescent fuelling education

- @teganphillipscomics — feelings about weight change

- @therugbydietitian — omega-3/recovery nutrition posts

- @no.food.rules — food stigma and flexible eating

Assess credentials, claims and evidence rather than assuming influencer content is reliable.

DIAGRAM ON SLIDE 46

What practical and safety problems did the lecture associate with restrictive diets?

- Short-term fix

- Poor sustainability

- Poor adherence

- Safety concerns:

- Low fibre

- Vitamin/mineral deficiencies

- Withdrawal symptoms

Athlete-specific concerns include not meeting fuelling and recovery needs.

What are the consequences of severe energy restriction in athletes?

- Loss of lean body tissue/muscle

- Hormonal changes

- Menstrual disruption

- Reduced bone mineral density

- Impaired mood and cognitive function

- Altered perceived exertion

- Dehydration, including from diuretics or passive sweating/saunas

- Worse physical performance

- Other psychological effects

DIAGRAM ON SLIDE 48

What sequence of changes makes up the diet-weight-regain cycle in the lecture diagram?

1. Start restricting intake → glycogen and water loss

2. Further body-mass loss, including muscle

3. "Starvation" response: reduced metabolism and reduced exercise

4. Deprivation and hunger → diet breaks and binge eating

5. Lower energy needs due to lost weight, but increased tendency to regain

6. End state can be more total weight with less muscle than before the diet

7. Cycle may restart with further restriction

Purpose: recognise and interrupt a potentially harmful cycle through sustained, adequately fuelled behaviour.

DIAGRAM ON SLIDE 49