This is a good idea to reduce visceral fat – BionicOldGuy

The book Let’s grow better, not grow old by Dr. Sean O’Mara caught my attention given my interests in this blog. He is an MD who in his late 40s has led a sedentary life and is not very healthy. He understood the importance of visceral fat, which is the fat accumulated around our organs, as opposed to subcutaneous fat (« under the skin »). Cosmetically, we usually worry about the subcutaneous, such as when trying to lose our « love handles » or « beer belly, » but it’s the visceral that has worse health consequences. Dr. O’Mara found that this is often seen routinely on MRI scans, but is not often noted by doctors because the scan is usually done to diagnose something else. In his case, it’s for rear issues. After realizing he had excess visceral fat and learning its importance, he changed his own lifestyle, including getting active and cleaning up his diet. This resulted in a large reduction in visceral fat and becoming healthier. Dr. O’Mara was so thrilled with the results that he changed his own practice to focus on it, and has since helped many clients become healthier. He looks at a list of 10 lifestyle changes, with exercise and diet at the top. For exercise, he believes that short intense sessions are more effective than long cardio sessions. For his own diet, he eliminated most overly processed foods and switched to a low-carb version of the paleo diet. Since it works so well for him, he recommends (or something). I will go into detail about whether this particular diet is necessary, but regardless, I recommend Dr. O’Mara’s book, both for inspiration and for the 10 helpful lifestyle tips.

I wanted to know more about exercise and diet recommendations. For me in particular, short bursts of intense exercise like HIIT are not recommended because of my leaky heart valve. So I wanted to find out what alternatives target visceral fat well. About the diet, I was wondering if low carb was really the key or if just cutting out processed foods would do the trick. This was a good candidate for an in-depth study of Gemini AI, so I asked the question “what is the latest evidence for diet and exercise to reduce visceral fat?”.The resulting chat is hereand the generated report is here. The report begins by confirming the negative health effects of visceral fat. It goes on to show that Dr. O’Mara’s recommendations are spot on, although there are some dietary alternatives.

For exercise, he generated this visceral fat reduction effectiveness chart based on evidence in the literature:

Sucra stands for « Area under the Cumulative Ranking Curve », the higher the number the better, it shows the effectiveness of the different treatments. I’ve reviewed the exercises with my limitations below. It turns out that the higher intensity 10×1 intervals I’m allowed to do on my bike are enough to tick the « high intensity » box, so they must be effective. As for the diet, there is the following table:

VAT means visceral adipose tissue, the same as visceral fat. So the type of diet Dr. O’Mara recommends works well. I was concerned that a plant-based diet was too vague without specifying « whole food, » so I asked:

I have an additional question regarding the « Comparative Efficacy of Dietary Patterns on Visceral Fat » section. I think the plant based diet (ppbd) result may be misleading. a plant-based diet can include highly processed food and food loaded with sugar or refined carbohydrates. whole plant food (wfpb) is better because it eliminates these low quality foods. Are there any research results on reducing VAT specifically for wfpb.

The answer is at the bottom of the chat here. The answer is that whole plant food works well too, although I haven’t had a direct comparison to see its relative effectiveness to low carb. I should note that you should never directly trust the results of these chats. I followed the references to confirm the important points, which I recommend you do.

Just to be sure, I read a second book on this topic:

This author also recommends short bursts of intense exercise, and when it comes to diet, he mostly emphasizes eliminating highly processed foods.

My takeaway is that exercise is important, especially at higher intensities. When it comes to diet, everyone seems to agree on cutting out processed foods. If you want to pursue this more aggressively, you can take the next step to a more restricted diet such as low carb or wfpb.

I was curious how the medical understanding of visceral adipose tissue has developed over time, so I made another query in Gemini « History of medical understanding of the role of visceral adipose tissue, » which led to this chat. Our understanding seems to have improved a lot from around the 1990s to today. One of the confusions that has been cleared up is that some people are overweight and metabolically unhealthy, and some have a lower BMI but are not healthy. This would make sense if the former had more subcutaneous fat and less visceral fat. Here’s a summary chart:

Read the chat if you’re interested in more detail. The finding of leakage into the liver is significant and fascinating.

The twins asked me this additional question »Would you like me to find a specific “master athlete” cycling protocol that balances steady state and intervals for optimal metabolic health?« I said too »yes but i have moderate aortic paravalvular leakage so it should be safe for that too« . The result is in this same chat and it pretty much confirmed what I’m already doing. My 10×1 intervals should be effective as well as longer less intense rides in « zone 2 ».

Posted by BionicOldGuy

I’m a mechanical engineer, born 1953, PhD, Stanford, 1980. I’ve been active in mechanical CAE for decades. I also have a lifelong interest in outdoor activities and fitness. I had both hips replaced and a heart valve replaced due to a genetic condition. This blog chronicles my adventures in staying active despite these bumps in the road. View all posts by BionicOldGuy

Published
February 7, 2026February 6, 2026