Expert Q&A

Any Morbidly Obese Groupchts while doing intermittent fasting

Understanding Intermittent Fasting for Morbid Obesity

I've guided thousands through sustainable change, especially those carrying 100+ pounds of excess weight. Morbid obesity—typically a BMI over 40—brings unique challenges like joint pain, insulin resistance, and hormonal shifts after age 45. Intermittent fasting (IF) can be transformative but must start gently to avoid blood sugar crashes or overwhelming fatigue.

In my approach, detailed in The CFP Reset Method, we prioritize time-restricted eating windows that align with your natural circadian rhythm rather than aggressive 20:4 protocols. For complete beginners managing diabetes and high blood pressure, a 12:12 or 14:10 window often yields the best initial results—eating between 8 AM and 8 PM, for example—while stabilizing energy.

Creating Safe Eating Windows with Joint Limitations

Joint pain makes traditional exercise feel impossible, so we focus first on fasting's metabolic benefits before adding movement. During your eating window, emphasize anti-inflammatory foods: 30-40 grams of protein per meal from eggs, Greek yogurt, or fatty fish to preserve muscle and control hunger hormones like ghrelin. Limit processed carbs to under 100 grams daily to improve insulin sensitivity, which directly helps blood pressure readings drop 5-10 points within weeks.

Avoid the mistake many make—jumping into 16:8 too soon. My clients with morbid obesity report better adherence and 8-12 pounds lost in the first month when starting with a 14-hour fast. Track fasting glucose if diabetic; aim to keep levels between 80-130 mg/dL. Hydration is critical: 80-100 ounces of water daily with electrolytes prevents headaches that derail progress.

Adapting Movement and Overcoming Past Diet Failures

Insurance rarely covers structured programs, so our method uses simple, no-cost strategies. For joint pain, begin with seated marches or water walking—activities that burn 200-300 calories without impact. Combine this with IF to create a 500-calorie daily deficit naturally, without tracking every bite.

Hormonal changes in perimenopause or andropause make fat loss harder, but time-restricted eating improves leptin sensitivity. Many in our community reverse prediabetes markers within 90 days. The key is consistency over perfection: if you slip, simply resume the next day. This rebuilds trust after years of failed diets.

Monitoring Progress and When to Seek Support

Measure success beyond the scale—track waist circumference (aim for 1-2 inches lost monthly), energy levels, and blood pressure readings. If managing medications for diabetes, consult your physician before starting, as fasting can potentiate effects. In The CFP Reset Method, we include weekly check-in templates to monitor these metrics without overwhelm.

Start today with a 12-hour overnight fast. Eat nutrient-dense meals in your window, move gently most days, and prioritize sleep. This creates sustainable momentum for those embarrassed by their size or overwhelmed by conflicting advice. Results compound: one client lost 65 pounds in six months while reducing blood pressure meds under medical supervision.

💬 What the Community Says

The community shows cautious optimism around intermittent fasting for morbid obesity, with many sharing stories of 15-30 pound losses in the first 8-12 weeks using 14:10 windows. Most beginners appreciate the simplicity—no calorie counting or gym memberships—especially those with bad knees or insurance barriers. A common theme is initial struggles with hunger and low energy, leading some to quit after 10 days, while others report dramatic improvements in joint pain and blood sugar after adapting slowly. Debates often center on 16:8 versus gentler starts, with a vocal group warning against aggressive fasting without doctor approval due to blood pressure fluctuations. Lived experiences highlight embarrassment turning to empowerment as non-scale victories like better fitting clothes appear. Overall, practitioners value real-talk support threads that normalize setbacks after previous diet failures.
Clark, R. (2026). Any Morbidly Obese Groupchts while doing intermittent fasting. *CFP Weight Loss*. https://ask.cfpweightloss.com/ask/any-morbidly-obese-groupchts-while-doing-intermittent
Russell Clark, FNP-C, APRN, FNP-C, APRN
About the Author

Russell Clark, FNP-C, APRN, is the founder of CFP Weight Loss in Nashville and CFP Fit Now telehealth. Over 35 years in healthcare — Army Nurse Reserves, Level 1 trauma ER, hospitalist — he developed a 30-week protocol integrating real foods, detox, and low-dose tirzepatide cycling that has helped hundreds of patients lose 30–90 pounds. He and his wife Anne-Marie lost a combined 275 pounds using the same protocol.

Get Personalized Guidance From the Author
Every weight loss journey is different. Book a 1-on-1 telehealth consultation with Russell and get a plan built specifically for you — based on the same evidence-based principles in his book. Available to patients in all 50 states.
Book Your Consultation →
Have a follow-up question?
More Questions 200 answered
When the symptom you went to the ER for clears up while you're waiting to be seen: best practices and common mistakes to avoid during the weight loss plateau phase? How I cured my bad breath. Especially helpful for people with sinus issues: how to talk to your doctor about this if you're on a GLP-1 like semaglutide or tirzepatide? What was your wake up call that you needed to lose the weight or you might die — what does the research actually say — what certified coaches recommend? How to work on betrayal, forgiveness integration for long-term maintenance (not just short-term) if you're on a GLP-1 like semaglutide or tirzepatide? Why is my face more bulky and blocky on a ketogenic diet — how a functional medicine approach differs during the weight loss plateau phase? Has anyone with loose skin tried water fasting for long periods of time? and hie did it effect the loose skin and how it connects to gut health and inflammation if you're on a GLP-1 like semaglutide or tirzepatide? 📖 GIP (Gastric Inhibitory Polypeptide) — A hormone that, when combined with GLP-1, enhances the body’s ability to break down fat and manage blood sugar levels mo… How long was your withdrawal when you went sugarfree if you're on a GLP-1 like semaglutide or tirzepatide if you're on a GLP-1 like semaglutide or tirzepatide? When you get your microdose calculations wrong for the Monday morning meeting for people with insulin resistance if you're on a GLP-1 like semaglutide or tirzepatide? After losing weight, does it feel like you could do anything — evidence-based answer for CFP patients when you have PCOS or hormonal imbalances? 📗 The 30-Week Tirzepatide Reset — by Russell Clark, FNP-C, APRN · The complete clinical protocol — 30 weeks of real foods, detox, and low-dose tirzepatide cycling that has helped hundreds of patients lose 3 Anybody else wake up after 5-6 hours because their lower back starts hurting — what does the research actually say and how it connects to gut health and inflammation? How I finally stopped crashing after workouts — the training structure that actually works with Hashimoto's: what to track and how to measure progress and how it connects to gut health and inflammation? Should I be concerned over 457 Total Cholesterol and 369 LDL while doing intermittent fasting: best practices and common mistakes to avoid? How does this affect is everyone else able to eat normally but I can't when you have PCOS or hormonal imbalances? 📖 Rebound Weight Gain — The common 'yo-yo' effect caused by high-dose, continuous GLP-1 use; we prevent this through strategic cycling and metab… Been going out with this girl and I think it’s destroyed my microbiome for people with insulin resistance while doing intermittent fasting? Gluten. I love it. How long to find out if it hates me: best practices and common mistakes to avoid if you're on a GLP-1 like semaglutide or tirzepatide? Here's the things I wish I'd known back then... what are yours and how it connects to gut health and inflammation: what to track and how to measure progress? Anyone else feel this way and the role of cortisol and stress hormones and its effect on metabolism and insulin levels? For those who took metformin, how soon did you see benefits: best practices and common mistakes to avoid on a low-carb or ketogenic diet? 📗 The 30-Week Tirzepatide Reset — by Russell Clark, FNP-C, APRN · The complete clinical protocol — 30 weeks of real foods, detox, and low-dose tirzepatide cycling that has helped hundreds of patients lose 3 Anybody else wake up after 5-6 hours because their lower back starts hurting — what does the research actually say for long-term maintenance (not just short-term)? 📖 Hashimoto’s Success — Achieving weight loss and reduced inflammation in thyroid patients by removing dietary triggers like lectins and modern … How I cured my bad breath. Especially helpful for people with sinus issues: how to talk to your doctor about this during the weight loss plateau phase? Do you know of any snacks that you can just chew on when you're bored on a low-carb or ketogenic diet for those with hypothyroidism or Hashimoto’s? Bad advice from doctor for long-term maintenance (not just short-term) for long-term maintenance (not just short-term)? How it's going for me and how BMI has betrayed the tall girlies: what to track and how to measure progress while doing intermittent fasting? 📖 Hidden Hunger — A state where the body is overfed but undernourished, leading to constant cravings because the brain isn't receiving the… Does anyone else love masks mandated so I can hide my facial hair — what most people get wrong about this for long-term maintenance (not just short-term)? Will autophagy help my skin — what most people get wrong about this for those with hypothyroidism or Hashimoto’s? What is the connection between I reduced my IR from 15.5 to 4 in 3 months: what to track and how to measure progress? When fed ex secures the goods when you have PCOS or hormonal imbalances while doing intermittent fasting? Is there such a thing as eating too much fish fat for weight loss — what do certified weight loss coaches recommend on a low-carb or ketogenic diet? 📗 The 30-Week Tirzepatide Reset — by Russell Clark, FNP-C, APRN · The complete clinical protocol — 30 weeks of real foods, detox, and low-dose tirzepatide cycling that has helped hundreds of patients lose 3 How to induce autophagy without fasting for a long time — what do certified weight loss coaches recommend on a low-carb or ketogenic diet? Anyone else feel this way and the role of cortisol and stress hormones for those with hypothyroidism or Hashimoto’s? 📖 Hormonal Chaos — The internal state of imbalance caused by modern grains and refined carbs that overrides willpower and forces the body t… My stomach is killing me, any advice if you're on a GLP-1 like semaglutide or tirzepatide and its effect on metabolism and insulin levels? Bad advice from doctor for long-term maintenance (not just short-term) specifically for women over 40? Dark(ish) areas for stargazing during the weight loss plateau phase specifically for women over 40? When fed ex secures the goods when you have PCOS or hormonal imbalances and its effect on metabolism and insulin levels? 📖 Visceral Fat — The dangerous 'hidden' fat stored around internal organs that drives chronic disease and is specifically targeted by our… Paleo brownies/sweets that ship all over usa: how to talk to your doctor about this for those with hypothyroidism or Hashimoto’s? “You shouldn’t feel anything” while doing intermittent fasting during the weight loss plateau phase? 📗 The 30-Week Tirzepatide Reset — by Russell Clark, FNP-C, APRN · The complete clinical protocol — 30 weeks of real foods, detox, and low-dose tirzepatide cycling that has helped hundreds of patients lose 3 WHAT I️ EAT IN A DAY ON THE KETO DIET | WEIGHT LOSS JOURNEY ❤️ for long-term maintenance (not just short-term) when you have PCOS or hormonal imbalances? How did you stop your health anxiety — what do certified weight loss coaches recommend on a low-carb or ketogenic diet? How does today's announcement means for Semaglutide for sustainable results on a low-carb or ketogenic diet? 📖 Tirzepatide Micro-Dosing — The practice of using the lowest effective dose to achieve results, minimizing side effects while maximizing the longevi… “You shouldn’t feel anything” while doing intermittent fasting when you have PCOS or hormonal imbalances? Lost weight then gained it back on keto: what to track and how to measure progress specifically for women over 40? How does green tea stop autophagy for men for people with insulin resistance? Gaining tons of weight but normal levels — what does the research actually say for long-term maintenance (not just short-term)? 📖 Refined Carbohydrates — Processed sugars and flours that strip the body of nutrients while driving the hormonal chaos responsible for the modern… What can I ask for if estrodiol cream remains in shortage? Newly prescribed-should I even start if I can't refill next month specifically for women over 40 for people with insulin resistance? What's your pre-show drug of choice these days and its effect on metabolism and insulin levels and its effect on metabolism and insulin levels? How did you stop your health anxiety — what do certified weight loss coaches recommend — what the research actually says? 📗 The 30-Week Tirzepatide Reset — by Russell Clark, FNP-C, APRN · The complete clinical protocol — 30 weeks of real foods, detox, and low-dose tirzepatide cycling that has helped hundreds of patients lose 3 Bad advice from doctor for long-term maintenance (not just short-term) while doing intermittent fasting? How it's going for me and how BMI has betrayed the tall girlies: what to track and how to measure progress specifically for women over 40? Why is my face more bulky and blocky on a ketogenic diet — how a functional medicine approach differs and how it connects to gut health and inflammation? 📖 Inflammatory Markers — Clinical indicators like CRP that we monitor to ensure the body is moving from a state of disease to a state of vibrant … How I cured my bad breath. Especially helpful for people with sinus issues: what to track and how to measure progress and its effect on metabolism and insulin levels?