John Diaz

Personal Trainer

John Diaz is a personal trainer and exercise professional with over 35 years of experience, based in Los Angeles, CA. John was first certified as a personal trainer in 1984 and later in 1989 co-founded Ultimate Health Medical Exercise Center with his sister Joanne. He creates prescriptive exercise programs designed specifically for his clients’ needs ranging from chronic pain relief, sports injury recovery, weight loss goals, and more. John has a degree in Exercise Science, is a member of the American College of Sports Medicine, and is certified through the National Federation of Personal Trainers (NFPT). He also holds a second-degree black belt in martial arts and is a certified self-defense instructor.

Education

BS, Exercise Physiology, University of California, Santa Barbara

Professional Achievements

His business, Ultimate Health, holds 5-star reviews on Yelp and Google
Fitness consultant for Myw8t Beverly Hills Obesity Center

Certifications & Organizations

Certified, National Federation of Personal Trainers
Credentialed Ketsugo Te Teacher
Certified, First Aid, CPR, and AED

Favorite Piece of Advice

The investment you make today in exercise, nutrition, and sleep will pay off in dividends for your health tomorrow.

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Q&A Comments (13)

Can I get big as a woman if I take Dianabol?

Well, the answer is yes, but with some important caveats. Dianabol is an anabolic steroid, and using it can lead to significant muscle growth beyond what you’d achieve naturally. Normally, women don’t get huge muscles from training alone because their natural testosterone levels are much lower than men’s. That’s why building muscle for women usually means gaining muscle tone without looking overly bulky. When you train, your muscles get stronger and more defined as they receive better nutrition and adapt to the workload. This process creates a firmer, toned look. But remember, taking anabolic steroids comes with serious side effects, especially for women. These can include things like voice deepening, changes in facial structure, and other irreversible effects. So, while Dianabol could help you gain size, it's important to understand whether these risks align with your goals.

Does a Weight Watcher diet provide enough nutrients?

The Weight Watchers program has come a long way since its early days, but whether it provides enough nutrients depends on how you use it. Initially, the point system was a bit flawed—it treated all foods with the same points, whether they were healthy carbs or sugary treats. This means that some people weren't making the best choices nutritionally. Plus, their protein intake was often too low, which is crucial for maintaining muscle and feeling full. These days, the program has evolved, and the point system now rewards healthier food choices differently. It’s designed to guide people toward more nutrient-dense options, which helps create more balanced meals. One of the biggest benefits of Weight Watchers is the community support; having people to share the journey with makes it easier to stay motivated and on track. That said, while Weight Watchers can work for some, you might still need to tweak your diet to meet your specific nutritional needs. For example, if you find you’re not getting enough protein or other vital nutrients, you can adjust the plan to suit your needs. Remember that our bodies are different, so it’s always a good idea to check if the program aligns with your goals and dietary needs.

How do I estimate the amount of calories that I'm consuming?

First, you need to understand portion sizes and general calorie content for most common foods. Familiarize yourself with what a typical serving looks like. Maybe a handful of nuts, a piece of fruit, a serving of meat the size of your palm—and learn their approximate calorie counts. This way, you can mentally tally your intake throughout the day. If you’re having meals at home, measuring your food a few times can help you get a sense of how many calories you’re adding to your plate. For example, one cup of cooked rice has around 200 calories, while a tablespoon of oil adds about 120 calories. Estimating portions this way helps you gauge your intake even when you’re not measuring precisely. When eating out, use visual cues to make educated guesses, but sometimes they include calorie content on their menu. Going back, a restaurant portion of pasta might be two or three standard servings, so consider how that impacts your estimate. If you’re eating something more calorie-dense, like pizza or desserts, keep in mind that a slice or piece may pack more calories than expected. Also, be mindful of sauces and dressings—they can quickly add your calorie intake without you realizing it.

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