Load rotation on every upper-body lift you already do.
The Gains Hammer adds true rotational resistance to cables, dumbbells and plates, unlocks movements you've never been able to load, and takes grip out of the equation. Three years. Seventeen prototypes. One attachment.
Equipment built to fix one specific problem.
No filler catalogue. Every piece exists because the training tool I needed didn't.
The Gains Hammer
Full rotational resistance on any cable, dumbbell or plate — plus hammer-style lifts without grip fatigue. Launching on Kickstarter. A refundable $1 holds VIP pricing and first-run delivery.
Best seller
BFR Pro 2.0 — Full Set
Professional-grade inflatable cuffs engineered in the USA. Arm cuffs 40% thinner than the closest competitor. 2 arm + 2 leg cuffs, CE-certified pressure gauge, carry case, plus free lifetime access to the Total Body BFR program.
Entry level
BFR Nylon Cuffs
The simplest way into blood flow restriction training — no pump, no gauge. Numbered tightness markings let you hit the same restriction every session and progress it deliberately. Mesh carry pouch and the Total Body BFR program included.
Tell it your equipment and your schedule. It writes the program.
The custom program generator builds a complete, periodised training block around the equipment you actually have and the days you can actually train — then adapts as you log. Every exercise is demonstrated on video, every set logged in one tap.
Everything, unlimited
- Custom program generator
- Every full training program
- Complete video libraries
Basic
- Complete video libraries
- Exercise demonstrations
- Programs not included
The research, written so you can actually use it.
The UNEVEN Muscle Growth Manifesto
The new science of regional hypertrophy — and how to "spot train" any muscle region with precision.
Paperback & e-book →
Shoulder Training Fundamentals
Everything you need to build bigger, stronger, healthier shoulders — science-based training for all three deltoid heads.
Get the book →
All-in-One Training Journal
Journal, planner and logbook in one — the weightlifting companion built around how programs actually progress.
Get the journal →Coming soon: Back Training Fundamentals · Chest Training Fundamentals
Research in your inbox, not another feed to scroll.
Fitness-Tip Friday
- One short, science-based tip — under a minute to read
- A quote of the week
- A subscriber-only deal every week
Prime Strength
- Two issues a week on training, performance & longevity
- LayMed — a private database of plain-English research summaries
- The Canon: a structured, progressive curriculum
Sovereign Strength
- Two issues a week on training, resilience & longevity
- LayMed research-summary database included
- The Canon, plus the annual State of Strength After 50 report
I build the tools I couldn't buy.
I'm Michael Kamalu. A 100th percentile MCAT score earned me a full scholarship to the Mayo Clinic School of Medicine, where I trained for two years before leaving to build the first of three 7-figure businesses in health and fitness.
Everything here comes out of the same process: find the gap between what the research says works and what equipment or programming actually lets you do — then close it. The Gains Hammer took three years and seventeen prototypes. The BFR cuffs took redesigning the arm cuff until it was thin enough to train through full range of motion.
Over 260,000 people follow the work on YouTube, and the reason is simple: I show my reasoning, cite the research, and I don't sell anything I don't train with myself.
— Michael
One tip a week. Under a minute. Actually useful.
Science-based, linked to the research, plus a subscriber-only deal every Friday. Free, and you can leave whenever you want.