Arzadon Fitness — Personal Trainer Toronto

Field Notes

The Arzadon Blog

What we're reading, measuring, and protocolling. Written by the coaches who run the floor — trends mapped to data, not headlines.

Featured

VO2 max test in progress on the air bike at Arzadon Fitness Toronto

Performance· 7 min read

VO2 Max is the Longevity Biomarker You’re Not Tracking

New cohort data out of Cleveland Clinic ranks VO2 max as a stronger all-cause mortality predictor than smoking, diabetes, or hypertension. Why coaches were right twenty years before the cardiologists.

Jay Arzadon·

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More From the Floor

Women resistance training with dumbbells at Arzadon Fitness

Body Composition· 8 min

GLP-1 Drugs Won’t Recomp Your Body — Here’s the Math

Ozempic drops the scale. It also drops lean mass. Without resistance training, ~25-39% of weight lost on semaglutide comes from muscle. The protocol that prevents it.

Heart rate zone training session at Arzadon Fitness

Conditioning· 8 min

Zone 2 Cardio: The Real Protocol Behind Mitochondrial Training

Mitochondrial density, fat-oxidation rate, recovery capacity — the case for low-intensity steady state has finally caught up to what conditioning coaches have been programming since the 80s. The 180—age rule and where it breaks.

Arzadon Fitness client mid-transformation with measured body composition data

Diagnostics· 9 min

InBody 770 vs DEXA: Which Body Composition Scan Actually Tells You What You Need

A side-by-side from a single client across two weeks. DEXA is the lab-gold standard. InBody is the in-clinic workhorse. The 4% gap, what causes it, and which one drives smarter coaching decisions.

Jay Arzadon discussing recovery strategy with a client

Recovery· 7 min

The Cortisol Cliff: Why Sleep Beats Supplements for Fat Loss After 35

Six hours of sleep cuts insulin sensitivity by 30%. The body fat that won’t shift on a clean cut almost always traces back to this graph. The sleep + light + caffeine cutoff protocol we use with executive clients.

Jay Arzadon coaching a client at Arzadon Fitness King West Toronto

Methodology· 6 min

Results-Based Pay: The Honest Model Behind Our 97% Results Rate

Most gyms pay trainers by the session. We pay ours on your outcome. Here’s the model behind the 97% measurable-results rate across 300+ clients — and what it means for you.

Biosignature consultation with measured body fat distribution at Arzadon Fitness

Diagnostics· 10 min

BioSignature Explained: What 14 Skinfold Sites Reveal About Your Hormones

Charles Poliquin’s biosignature mapping isn’t pseudoscience — it’s a pattern-recognition layer on top of well-documented endocrinology. Why the umbilical site flags insulin, why the suprailiac flags estrogen, and what to do with the data.

King West professional training at Arzadon Fitness during off-peak hours

Recovery· 5 min

Recovery Debt: Why King West Professionals Hit the Wall by Wednesday

The condo professional who trains hard Saturday and Sunday, then can’t recover by midweek. Compounding sleep deficit, poor protein timing, alcohol on Friday — the math behind why most King West clients arrive in a state of chronic under-recovery.

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