Why Men and Women Over 40 Struggle to Stay Lean, Strong, and Injury-Free...


Use the Smarter, More Effective and Safer Way to Train That Delivers Results in Just a Fraction of the Time!

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They’re stuck doing long, exhausting workouts... using outdated routines... following the wrong advice from social media experts... or wasting hours chasing results that never show up.

But what if you could get better results in half the time... and actually build a stronger, leaner, more resilient body — even as you age?

That’s exactly what you’ll learn inside The Science and Practice of High Intensity Training.

This isn’t guesswork or gym bro advice.

It’s a proven approach — backed by science and decades of real-world experience — that shows you how to train effectively, efficiently, and safely... so you finally get the results you deserve.

I’ve Spent Decades in the Fitness Industry — And I’ve Seen What Most People Get Wrong

And over and over again, I saw the same thing: People working hard... showing up week after week... very dedicated and motivated but still not getting the results they deserve.

Not because they’re lazy.

But because they were following poor advicedeveloped poor habits — using poor form, low intensity, outdated training methods, bad habits developed over time, learning from well meaning friends, or guidance from underqualified personal trainers.

I’ve seen it all — excessive volume, working out too often, poor choice of exercises, sloppy training technique and using momentum to move the resistance, dangerous routines, people wasting hours in the gym without knowing what actually works.

That’s why I made it my mission to change that.

I’ve dedicated my career to helping people train smarter and train properly — using science-backed methods that are safe, efficient, and actually deliver excellent results.

And I wrote The Science and Practice of High Intensity Training to give you a clear, proven blueprint for how to do just that.

Whether you're 40, 50, 60 or beyond — you can absolutely build strength, stay lean, and feel your best... if you're willing to let go of the noise, and follow scientific training principles that really work.

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Ready to Train Smarter — with Proper Strength Training methods?

Click the button below and grab your copy of The Science and Practice of High Intensity Training for just $8.99

You’ll train smarter. You’ll feel better. And you’ll finally get the results you deserve — without wasting another hour in the gym.

What If You Could Train Less... But Get Better Results?

That’s exactly what this guide will show you.

The Science and Practice of High Intensity Training is a no-fluff, research-backed manual that shows you how to work out in a way that’s:

  • More effective

  • More efficient

  • And safer — especially for adults over 40

You’ll learn exactly how to train your muscles to grow stronger and leaner, stimulate your metabolism, improve your cardivascular fitness and protect your joints — all without spending hours in the gym.

Inside, you’ll discover:

  • Why most traditional workouts are holding you back — and what to do instead

  • How to build more strength in less time (without beating up your body)

  • The truth about volume, frequency, and intensity — and how to get them right

  • The biggest mistakes even experienced lifters make — and how to avoid them

  • How to age with strength, stability, and vitality — using workouts you can sustain for life

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Imagine This...You walk into the gym with a plan. You train for 30 minutes — not 90. During your highly effective workout you are focused and working your major muascle groups with the proper intensity level. When finished you walk out knowing you actually stimulated your muscular system to get stronger and healthier, without wrecking your joints, or draining your energy. You will see and feel your body changing. Your strength is coming back. Your waist is tightening. And you feel energized, not exhausted. You no longer waste time on guesswork or copycat routines. You’re confident, focused, and training with purpose.Your joints feel better. Your posture improves. You walk taller, feel sharper, and move through life with more energy than you’ve had in years.

That’s what this book is here to help you experience.

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If am a complete Fitness beginner is this helpful for me? Absolutely, beginners have not developed any poor training habits or learned any misinformation. Just start out slowly and gradually increase your efforts as you progress.

“Will this work for me if I’m not a gym rat?” Absolutely! This guide simplifies everything so you can get maximum benefits even with minimal equipment or time.

Are You Ready to Train Smarter, Feel Better, Live Stronger?


Use The Over-40 Blueprint for Safer, More Effective Fitness Training

Click the button below and grab your copy of The Science and Practice of High Intensity Training for just $8.99

Here’s Everything You Get for Just $8.99

When you grab your copy of The Science and Practice of High Intensity Training today, you’ll get instant access to a powerful, easy-to-follow guide that shows you exactly how to train for maximum results in minimum time.

The Complete High Intensity Training Blueprint

Learn the proven principles behind the most effective, efficient, and safe way to exercise — especially for adults over 40. Backed by real science and practical experience.

Step-by-Step Breakdown of Proper Training Technique

Avoid the most common mistakes. Train smarter, safer, and more effectively — no guesswork or bro-science.

Science-Based Programming That Delivers Results Fast

Understand how to stimulate real muscle growth and metabolic benefits — without spending hours in the gym.

Optimized for Adults Over 40

This isn’t just for 20-year-old bodybuilders, (although bodybuilders can benefit greatly by training properly). This is fitness training for both for men and women who want to stay strong, lean, and pain-free as they age.

Still Not Sure? Let’s Clear It Up…

“I’m already working out — do I need this?” Yes — especially if you’re not getting the results you want. This will show you why, and exactly how to fix it. Most experienced trainees have actually developed some poor training habits that this information will help correct that problem.

“Is this just for hardcore lifters?” Not at all. It’s designed for real people — especially men and women over 40 — who want better overall physical fitness, strength, energy, and results without overtraining.

"What if I’ve tried everything already?” Perfect. That means you’ll immediately recognize how different and refreshing this approach is — because it’s backed by real science and professional experience, not fads or fluff.

You’ll soon be training better and smarter. You’ll feel better. And you’ll finally get the great results you deserve — without wasting another hour in the gym.

Includes Research References and Resources

This isn’t theory — it’s backed by published studies and decades of professional research and studies. This extensive list of scientific and academic resourdes are included in the book.

This is a small price for some extremely usefull information. Try hiring a personal trainer for $8.99, no way, obviously, but The Science and Practice of High Intensity Training will teach much more about proper training!

No monthly subscriptions. No upsells. Just one small payment to finally get the real answer to smarter, safer training.

What Others are Saying...

Short workouts, big results

Reviewed in the United States on July 28, 2025

“Honestly, this book was a game-changer. As someone who doesn't have hours to spend in the gym, I really appreciated how it breaks down high-intensity training in a way that actually makes sense. his chapters are clear, practical, and actually made me rethink how I approach workouts."

Echibase13

A Science-Backed Guide to High Intensity Training

Reviewed in the United States on May 6, 2025

"The Science and Practice of High Intensity Training" delivers exactly what the title promises: a comprehensive, evidence-based exploration of high-intensity training (HIT). In a fitness world often clouded by trends and misinformation, Waters provides a refreshing dose of clarity, making this book a valuable resource for both beginners and experienced fitness enthusiasts."

Al Anon

Well Written and Organized

Reviewed in the United States on May 27, 2025

“Well written and organized. I have been working out for over 25 years and have experienced great results from HIT training. This guide really solidifies the techniques I know work and it helps a beginner understand and implement them perfectly. Once you understand the basics, you can build upon them yourself for years to come"

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This Is The Best $8.99 You’ll Ever Spend On Your Health and Fitness

Here’s why this makes so much sense:

Think about it:

You’ve probably already spent hundreds — maybe thousands — of dollars on gym memberships, supplements, classes, or trainers...

But if you’re still not seeing the results you want — it’s time to stop guessing.

For just $8.99, you’ll finally learn the real science behind how to train in a way that actually works.

No fluff. No filler. Just proven methods that help you get stronger, leaner, and pain-free — in less time, with less effort, and with less risk of injury.

Why keep spinning your wheels when the smarter solution is right here — and it costs less than lunch?



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Don’t Wait — Every Week You Wait Is Progress Lost

The longer you follow outdated training methods, the more:

  • Time you waste

  • Risk you take

  • Results you leave on the table

  • Why keep spinning your wheels when the smarter solution is right here — and it costs less than lunch?

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David M. Waters is a highly experienced fitness professional with a Bachelor of Science Degree in Physical Education from the University of Massachusetts at Amherst. He has worked as a personal training instructor, fitness director, competitive athlete, author and fitness facility manager, accumulating over 40 years of experience in the field. As a physical fitness educator, David has helped countless individuals achieve an active and healthy lifestyle through exercise and fitness training since 1979. David is the author of both The Science and Practice of High Intensity Training and The Fitness Center Handbook.

Please note that the information contained on this website or any available publications is for educational purposes only, and no attempt at prescribing an exercise program has been made. David Waters / Superfitnessforever.com shall not be held liable or responsible for any injury or damage resulting from any individual’s participation in any exercise program. It is recommended that individuals consult with their physician prior to undertaking any exercise program.