THIS SYSTEM HAS BUILT MUSCLE FOR 30 YEARS

Train Smarter. Recover Faster. Keep Getting Stronger—After 40 and Far Beyond.

If you’re a man over 40 who refuses to accept plateaus, chronic soreness, or gradual decline as your future, this book was written for you.

The POWER FACTOR WORKOUT shows you how to build measurable strength and new muscle month after month—without guesswork, wasted effort, or joint-grinding workouts.

This isn’t another routine.
It’s a precision training system, developed, tested, and refined over three decades, trusted by hundreds of thousands of serious trainees who wanted results they could prove—not just feel.

Most workout programs rely on subjective effort:

“Train hard”
“Push yourself”
“Listen to your body”

Vague measurement like that is exactly why progress stalls and, if you’re over 40, the muscle starts to melt off your body year by year.

MUSCLE EQUALS YOUTH

Have you ever seen two people who were both 60 years old but one of them looks 70 and the other looks 45?

Age can’t be measured by the calendar alone.

There are several well established “bio markers of aging” that are used to give more accuracy to the assessment of physical age.

Guess what?

The amount of muscle your body contains is one of the principle bio markers. The more muscle you have, the younger you are.

Another bio marker of aging is bone density. Guess what the number one method is of increasing bone density? Heavy, weight-bearing exercise.

Those of us over forty years of age can greatly slow down aging processes by performing rational, efficient strength training that increases muscle mass and bone density.

The really great news is that it can be done without hours of exercise performed week after week in perpetuity.

Less wear and tear on the body, fewer workouts and increased youth.

Hey, it’s great to finally be old and wise.

IF NEW MUSCLE IS THE GOAL, THIS METHOD DELIVERS - EVERY TIME

DON’T LET MUSCLE LOSS TURN YOU INTO AN OLD MAN

The POWER FACTOR WORKOUT replaces opinion with physics.

You train using objective, measurable intensity, grounded in mathematics and real-world mechanics—so every workout produces a verifiable step forward.

In This Book, You’ll Learn How to:

✔ Quantify every workout so you know exactly how hard you trained
✔ Track real output, not just sets and reps
✔ Apply progressive overload with mathematical certainty
✔ Recover faster by managing intensity instead of guessing
✔ Continue gaining strength and muscle—even as recovery demands increase with age

The 3 Variables That Control All Strength Progress

The POWER FACTOR WORKOUT measures the only three inputs that truly determine exercise intensity:

Load — the weight you lift
Reps — the total work performed
Time — the duration that defines intensity

By simply recording these three numbers for every exercise, you eliminate guesswork entirely.

No more “I think that was a good workout.”
You’ll know.

When Intensity Is Measured, Progress Is Inevitable

When your training is quantified:

Progressive overload becomes automatic
Plateaus become diagnosable
Every session becomes a calculated improvement, not a gamble

Your strength increases.
New muscle follows.
Confidence compounds.

Workout after workout.

DECADES OF REAL WORLD TESTING WITH GUYS LIKE YOU.

These are the results of tests we ran with a small group of customers who had already been weightlifting for years. We wanted to compare the benefits of lifting as much as possible in 30, 60, and 90 second timed sets.

We grouped people randomly (based on the first letter of their first name) into three groups that performed timed sets with the same exercises. All of them were comfortably beyond the age of 40. This was an informal study done with only 24 people and each conducted their workouts on their own and unsupervised.

During the test they performed an average of just under 9 workouts and it took each group between 67 and 78 days to complete them since their full recovery each time was paramount and closely measured using their Power Factor numbers.

We measured their strength gains (measured in lbs/min lifted) across six muscle groups; Triceps, Chest, Traps, Low Back, Lats, and Quadriceps. Gains here are shown from the 3rd workout to the last workout, as the earliest gains often come from improvement in technique rather than actual muscle gain and we wanted a fair comparison.

At the end we measured the change in body weight and fat to calculate the actual muscle gained. You can see the 30-second group outperformed. Of course, the weights used to failure at 30-seconds are significantly heavier than what can be sustained for 60 or 90 seconds, but all groups exerted themselves at the peak limits of their power each workout. As you can see, the 30-second group gained about 9% strength per workout and 0.8 lbs of muscle per workout.

This is just one of dozens of things we’ve tested. We measure the effectiveness of different variation like strips sets vs pyramid sets vs 1 set vs 2 sets vs 3 sets vs 100-rep sets, etc. We also measured what exercises deliver the highest intensity to a given targeted muscle; e.g hammer curls vs preacher curls vs barbell curls, etc.

When you have an objective measurement like the Power Factor (and Power Index) you can make rational, informed decisions about what is working best for YOU, not for the average guy, or a younger guy, or a more gifted athlete.

You can also know with certainty whether today’s workout was actually higher intensity than last Tuesday’s workout – or whether you should have taken more time to recover.

WHAT USERS SAY ON AMAZON…

(Click here to open all the reviews in a separate tab.)

“Decades of Experimentation behind this Efficient Muscle Building System” – Daniel Blair

I first used Pete Sisco’s strength training over 20 years ago, and his system is still one of the most effective strength-building methods I’ve ever tried.

“One of the best things I’ve learned in life.” – Kirill

Almost always beat new records in weight and reps in most of the exercises. I know exactly what exercises to do. Calculate the exact weight. Calculate the exact number of reps. Easy. Efficient. Fast. (Lifting is hard, though:)

“This is the most valuable method I had ever tried. Results? IT WORKS!” – Mark Reynolds ‘Courageous Lion’

I am going to be 72 and am most likely from what I’ve seen, the strongest man at the Planet Fitness that I go to and I attribute it to Pete’s methods that I’ve been utilizing for at least 30 years. Thank you, Pete! The Power Factor I’ve learned from you is definitely in my TOP-10 best things I’ve learned in my life.

“A must for any serious lifter” – Naval Gator

I’m in my 50s and love it b/c it allows for full recovery and takes the guesswork out of my training, which saves my joints from overtraining. It’s great for older, serious strength athletes, but can be used by lifters of any age. I wish I had access to this in my 20s and 30s, as it would have saved my joints from the bro science methods I used.

“If your time is valuable, get the most out of it in the gym instead of just wasting time” – Amazon Customer

I was one of the people who participated in the 2013 mass gain study that some of this book is based on, I signed up for it because I had found his “Train Smart” e-book on Static Contraction was such a big change from the normal spend hours working out routine and it worked so well for me. I can tell you it works well for a massive increase in strength in a short amount of time.

“A time saving no non-sense system for getting strong” – Amazon Customer

Here is a no non-sense system for getting strong. It is based on research and proven without a doubt that it works. I have been doing it on and off for a long time now, and has been keeping me functionally strong (I’m 70 YO !).

“Pete Sisco’s System, Explained Simply” – Amazon Customer

The book stands out for its emphasis on numbers and measurement rather than hype or personal stories. Sisco treats strength training as something that can be tracked and analyzed, encouraging readers to use his formulas to monitor their progress. That practical, data-focused approach gives the book a distinctive feel and will likely appeal to readers who prefer a straightforward, methodical way of thinking about training.  

“Most efficient way to build muscle” – Bill

Using this system you will add muscle, spending as little time working out as possible, while minimizing injuries and wear on your body.

“Through the roof strength gains without injuries!” – Willie T. Belter

I was introduced to this program by Pete several years ago and even was part of a study conducted by Pete and my strength gains were incredible!

“Clear, Simple, Highly Effective” – Farrelli

I worked with Pete Sisco as my coach, sharing with him my data and results for what became an earlier book. The principles worked brilliantly. i still use them today in my workouts. I’m grateful for Pete’s clarity and simplicity.

“Power factor training works!” – Gary M. Rogan

Power factor workout is an effective means to replace the traditional weights workout with a structured timed workout utilizing only the strongest range of motion. The workout includes an excel spreadsheet to enable the user to track progress – because that’s what it’s all about. Pete discusses issues defining weight training and dispels myths that hold many of us hostage to outmoded training methods.

“The most efficient workout method” – RogueWave

Science-based, and one of the most efficient ways of working out there is! It’s great no matter what, but if you are a ‘I have no time to workout’ type, this book is for you. You’ll get the most out of your time in the gym, and you’ll be amazed how little time you actually have to spend to get results.

“Solid Strength Building Program” – Patrick

This is a legitimate strength training program that cuts to root of everyone’s concern: how to put on muscle efficiently. Do yourself a favor and dive right into the “smart” way to strength train.  

“No Fluff or Filler” – Robbie79

Great guide for anyone who just starting in weightlifting, or who seems to have hit a plateau and can’t make any more gains. This book is especially good for men over 40 as stated in the title. The book is direct and straight to the point, no fluff or filler.  

“This book will teach you how to get strong and healthy” – Amazon Customer

I’ve been a follower of Pete’s work for many years and have used his power factor workout with great success. Follow his plan and expect amazing results without spending endless hours in the gym, even if you are well over forty. I am able to keep doing the things I was doing in my forties and even younger. And with the extra time that I’m not spending in the gym I’m enjoying time playing with my grandkids. Don’t hesitate, get this book and start your way to a stronger, healthier body!

“You will gain strength!” – Jack Koelbl

This system works! You will gain power every time you practice the techniques. I’ve been following this style for many years and am well satisfied with it. I recommend you give it a try!

“Power Factor works better than anything else I’ve tried.” – C. Stephens

Pete knows what he’s talking about. His methods and tools had me hitting new personal records almost every time I hit the gym. Fast and effective. Believe it.

“Gains Every Time” – Jackson Collier

When I was working with Pete and the Power Factor Workout I made gains every single workout.

“At 68 I still follow Sisco’s principles with great results.” – Diane Terrell

I’m glad Pete decided to update and publish ‘Power Factor Workout”. At 68 I still follow Sisco’s principles with great results.  

“Short and Sweet. Best bang for your workout buck!” – Joe

Great update from the original decades ago. Short, concise, gets to the point. Plus, links to the workout log for tracking your progress. Great exercise routine for the busy person or seniors who want to spend as little an amount of time as possible in the gym, while getting the most benefits. Thank you, Pete, again!

“Effective and time-efficient program” – Amazon Customer

This book is a winner. Pete goes through the logic and science behind the program in an easy to understand way, and then teaches you step by step exactly what to do. All the research is presented as well. The downloadable bonus materials are worth their weight in gold. Highest recommendation.

“Fantastic training program” – Ruka Broughton

This program’s great I gained muscle and leg press weight is 400kgs!!! All my weight increased dramatically. And these workouts make me feel awesome. The recovery time is important as the body needs this. Then muscle grows and I’m refreshed ready form more… I couldn’t believe training only once a week but the results are here. I’m bigger at age 64 and much stronger than people half my age. Thank you Peter.

“Great book and program!” – Roxy

This book is highly recommended for anyone interested in as effective and efficient strength training as there is. Expect large strength gains. I’ve used the program myself and can attest to its efficacy. Do yourself a favor and give the program a few months try and see for yourself.

“If you want to stay athletic and capable as you get older” – Amazon Customer

I want to age well, keep playing tennis and golf, and have the strength to enjoy the things I love without spending my life in the gym. This is the shortest, most logical workout approach I have found. There is no fluff, just practical strength that carries over into real life and sport. At 57, I am playing the best tennis of my life, moving better, feeling stronger, and recovering faster while spending less time training. If you want to stay athletic and capable as you get older without complicated programs, Pete’s book delivers.

“How it worked for me” – Amazon Customer

Pete Sisco’s POWER FACTOR WORKOUT: Building Muscle for Men Over 40 is a fantastic resource for men over 40 (or younger for that matter as the same principles apply). I began going to the gym seriously when I was 54 and couldn’t have kept going and building the muscle and stamina I have without the knowledge contained in Pete’s book. Now I’m 68 and still going strong and with plenty of energy. I recommend this easily-understood book for all who are serious about becoming strong and making the most of their time both in and out of the gym. I couldn’t have achieved my personal record in the leg press of 1,565 Ibs without knowing this stuff.

“Power Factor Works” – Nicolas Young

I used Power Factor methodology about 10-12 years ago to build muscle, and the program delivered for me. Really pleased to see that this has now been tailored for men over 40, as time waits for no man…

“Strength, muscle density and overall hardness were through the roof.” – Tim

I have been using Peter Sisco’s power factor training system now for close to 15 years. At 65 and a previous BB competitor, this program is something very special. I did have to take a break off and on over these past years from this system. Only because of how well it had worked. Strength, muscle density and overall hardness were through the roof. Switching from the shorter range to a higher rep format Peter offers as well. This worked wonders. So if people happen to read this review and are just the slightest bit curious…I say this give Mr. Peter Sisco’s training format a shot. Especially if you are searching for other types of MUSCLE building programs being this one in particular for sheer strength and size you will not be disappointed.

“Rest is as Important as training” – Max

I found Pete’s book Power Factor Training in the late 90’s. Being “A Scientific Approach to Building Lean Muscle Mass” sold me. Everything I had learned before than was “Intuitive Training” or rote programs to work out 3x/week, which I did until I over-trained, then stopped for months, repeat again and again. I thought it was me. Pete was the first person I ever heard say that rest was as important as training. My gains using his system were inspiring as I was no longer over-training. I highly recommend his books.

“Great program, fully enjoyed it” – Johnny Gerbrandt

This is a great reboot of a system that did not get the attention it deserved. I have used this, and it is awesome, but you really have to pay attention to do it right. Some guys will do half of it and say it doesn’t work. Understand how things work, and it will work. Great program, fully enjoyed it, using it now in my training, I am 56 years old.

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Try the POWER FACTOR WORKOUT for yourself. If you buy it directly from me and it doesn’t work for you within 60 days, I’ll refund your ten bucks and you can keep what you bought. I can’t think of anything more fair than that. – Pete Sisco