• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar
Generation Iron

Generation Iron Fitness & Strength Sports Network

  • Movies
  • Original Content
  • Reviews
    • Supplements
      • Pre-Workout
      • Fat Burners
      • Testosterone Boosters
      • Creatine
      • Protein
      • BCAAs
      • Multivitamins
      • Omega-3
      • Joint Supplements
      • Super Greens
      • Meal Replacement
    • Recovery
      • Best Cold Plunges
      • Best Saunas
      • Best Foam Rollers
      • Best Massage Guns
    • Programs
      • Best Online Workout Programs
      • Best Workout Streaming Services
      • Best Home Workout Programs
  • Equipment
    • Cardio
      • Treadmills
      • Best Exercise Bikes
      • Best Stair Climbers
    • Fitness Accessories
      • Best Apparel
      • Best Gym Bags
      • Weightlifting Shoes
    • Strength
      • Best Dumbbells
      • Best Barbells
      • Best Kettlebells
      • Best Squat Racks
      • Best Weightlifting Belts
      • Best Home Gym Equipment
      • Complete Home Gyms
    • Training
      • Best Knee Sleeves
      • Best Wrist Wraps
      • Best Weightlifting Wraps
      • Best Weightlifting Gloves
  • More
    • About Us
      • Our Team
      • Our Experts
    • Advertise
    • Franchise With Us
    • Exercise Guides
    • Athlete Profiles
    • Podcasts
    • Power 30
    • Bodybuilding Awards
    • Supplement Awards
  • Shop
News

Jeff Cavaliere on Building Muscle After 40 Without TRT

by Terry Ramos Published on Mar 25, 2025 Expert verified by Dr. Jacob Wilson

Jeff Cavaliere on creatine
This post may contain affiliate links (disclosure policy).

Cavaliere suggests strength training three to four times weekly with slow, controlled reps after 40. 

Jeff Cavaliere is a highly respected fitness expert, physical therapist, and strength and conditioning coach known for his science-driven approach to fitness, bodybuilding, and health. As the founder of Athlean-X, Cavaliere provides science-based workout programs and supplements designed to help people move, perform, and look like athletes. 

With years of experience, Cavaliere honed his expertise as an assistant strength coach, conditioning coach, and head physical therapist for the New York Mets. He has also authored numerous books on fitness, muscle building, and health, solidifying his reputation as a trusted authority in the field.

Now over 40, Cavaliere addresses a common challenge many men face as they age — building muscle mass. While some turn to testosterone replacement therapy (TRT) to see results, Cavaliere offers insights on how to build muscle naturally after 40. In this post, he shares his advice for achieving strength and fitness without relying on TRT.

Cavaliere on Building Muscle After 40 Without TRT

Jeff Cavaliere says he has a problem with medical doctors who make blanket statements that seem discouraging for people trying to build muscle. “You’re sick, you want to get better, that’s who you go to, but you want to kind of optimize your health, he’s not the right guy for that, and he’d be the first one to admit it,” Cavaliere said. 

Comparison Between Joe Rogan & David Goggins

Jeff Cavaliere believes that we are setting ourselves up for failure by comparing ourselves to who we see. In old times, we looked at ourselves and trained in our basements. We celebrated our little progress, and we felt good about it. “You string together enough victories to feel motivated to keep going,” he stated. 

However, these days, people don’t look at themselves to gauge their progression; they seek validation from others, which is very discouraging. The problem is they’re not just looking at Joe Rogan and David Goggins; they’re looking at regular people looking fantastic, and they get discouraged. “When regular people start to look really good, that becomes especially defeating,” Cavaliere noted. Cavaliere advises people to steer away from those comparisons.

According to Cavaliere, he believes that Joe Rogan has been openly honest about being on TRT. However, people would dwell on his use of TRT, and that’s an excuse not to train, forgetting that he’s on a rigorous training plan. He does things like Jiu-Jitsu and prioritizes his health, which accounts for his appearance.

“Whether or not the TRT is a factor of that, of course, it can enhance things, but it’s not the main reason or the only reason why.”

— Jeff Cavaliere

However, David Goggins claims to be 100% natural, which Cavaliere believes. According to Cavaliere, Goggins looks phenomenal, too, even at 50. This begs the question of whether one can look at that even after 40.

“How can we look like that? Well, it is possible. I’m here to tell all those out here that think it’s not possible that it 100% is, and the way to get there is to have a specific approach to training and nutrition,” Cavaliere said. 

Training Approach After 40

According to Jeff Cavaliere, people looking to build muscle after 40 should prioritize the following. 

Aim for Three to Four Strength Workouts Weekly

“If you can do four, I would do four. If you can only do three, I’d do three. If I was doing three, I’d be doing total body workouts. If I was doing four, I’d do a Monday and a Tuesday with a day off and then a Thursday and a Friday, and I split it up with upper and lower,” he stated. 

Train for Both Strength & Hypertrophy

According to Cavaliere, some people don’t know the difference. He says hypertrophy is when one focuses on building muscle, while building strength is about becoming a stronger individual and moving more weight in space.

When you get older, your strength and muscle mass will be significant. “You’re going to need your strength because with each passing decade, you’re going to actually lose the ability to produce force and that can set you up for some disasters down the road,” he stated. 

Maintaining muscle mass and increasing testosterone is also essential because, as sarcopenia sets in, you start to lose muscle mass. This makes you more frail and more susceptible to disease. “What I would do is I would try to separate those two workouts where one of my focuses in those workouts was to train more for strength by doing lower repetitions with heavier weights.” 

View this post on Instagram

A post shared by ATHLEAN-X™ | Jeff Cavaliere MSPT, CSCS (@athleanx)

If you’re looking to build muscle, Cavaliere says he would focus on slowing down reps even if you have to lower the weight. You could use four seconds of timing going up and four seconds coming down. Cavaliere also adds that training using a full range of motion is beneficial (1).

Conditioning

According to Jeff Cavaliere, you become less efficient metabolically as you get older. He further explains that you don’t burn as many calories as you used to quickly. If you want to keep the body fat away and maintain muscle mass, you might have to increase your cardio output (2).

Nutrition

Cavaliere says nutrition is the ultimate driver of body fat levels. 

“If you want to be lean, you can accomplish it all through nutrition.” 

— Jeff Cavliere

However, the most challenging thing for people to conquer is maintaining low body fat levels as they age. The first thing is because of the metabolic slowdown, and the second is what he calls the 23-in-1 concept. The 23-in-1 concept means there are 24 hours daily, one hour for the gym, and the remaining 23 hours to maintain proper nutrition.

Jeff Cavaliere’s advice for people on building muscles after 40 is to try not to focus too much on calories in and calories out. This is because focusing on that doesn’t necessarily keep the attention on the quality of those calories. He also says not to be “carbophobic,” which refers to starchy carbohydrates. Being carbophobic can set you up for an exclusionary-based diet, where you eliminate something completely. He suggests using portion size control for carbs instead.  

Follow Generation Iron on Instagram, Facebook, and Twitter for more expert tips! 

References

  1. Schoenfeld, B. J., & Grgic, J. (2020). Effects of range of motion on muscle development during resistance training interventions: A systematic review. SAGE open medicine, 8, 2050312120901559. https://doi.org/10.1177/2050312120901559
  2. Bellicha, A., van Baak, M. A., Battista, F., Beaulieu, K., Blundell, J. E., Busetto, L., Carraça, E. V., Dicker, D., Encantado, J., Ermolao, A., Farpour-Lambert, N., Pramono, A., Woodward, E., & Oppert, J. M. (2021). Effect of exercise training on weight loss, body composition changes, and weight maintenance in adults with overweight or obesity: An overview of 12 systematic reviews and 149 studies. Obesity reviews : an official journal of the International Association for the Study of Obesity, 22 Suppl 4(Suppl 4), e13256. https://doi.org/10.1111/obr.13256

About Terry Ramos

As a personal trainer and writer, Terry loves changing lives through coaching and the written word. Terry has a B.S. in Kinesiology and is an ACSM Certified Personal Trainer and ISSA Certified Strength and Conditioning Specialist. He enjoys playing music, reading, and watching films when he's not writing or training.

View All Articles

Primary Sidebar

Get the Latest

Stay informed with the latest news, product reviews, & expert advice.

Popular Reviews

  • best protein powders

    The Best Protein Powder Supplements of 2025 (Tried and Tested)

  • Best Creatine Supplements For Bulking & Muscle Growth of 2025 (Personally Tested)

  • top x pre workout

    The 14 Best Pre-Workout Supplements of 2025 (MD Reviewed)

  • Performance Lab SPORT BCAA

    The Best BCAA For Bodybuilding Health & Performance Goals

Trending Articles

  • female fitness models

    18 Best Butts On The Internet (Updated 2024)

  • ronnie coleman the king workout

    Ronnie “The King” Coleman’s Complete Bodybuilding Workout

  • The Ultimate Mike Mentzer Workout and Diet

  • Chris bumstead's 2024 workout and diet plan

    Chris Bumstead’s 2025 Complete Bodybuilding Workout & Diet Plan

Popular Now

  • best protein powders

    The Best Protein Powder Supplements of 2025 (Tried and Tested)

  • Best Creatine Supplements For Bulking & Muscle Growth of 2025 (Personally Tested)

  • top x pre workout

    The 14 Best Pre-Workout Supplements of 2025 (MD Reviewed)

  • female fitness models

    18 Best Butts On The Internet (Updated 2024)

  • best citrulline supplements

    The Best Citrulline Malate Supplements for Performance and Pump

  • ronnie coleman the king workout

    Ronnie “The King” Coleman’s Complete Bodybuilding Workout

Generation Iron

Generation Iron is the first and only digital network delivering health, fitness, bodybuilding, and strength sports content. We deliver premium content with the biggest names in fitness and provide expert coverage, reviews on top brands, workout tips and trends in the worlds of fitness, health and strength sports.

Strongman Corporation
Vladar

Sections

  • Trending News
  • Original Movies
  • Original Content
  • Supplement Reviews
  • Equipment Reviews
  • Exercise Guides
  • Nutrition Guides
  • Athlete Profiles

More

  • About Us
  • Our Team
  • Our Experts
  • Advertise
  • Franchise With Us
  • Podcasts
  • Power 30
  • Shop

CONTACT

Generation Iron Brands LLC
134 West 29th Street Suite 902
New York, NY 10001
Email: [email protected]

Follow

  • Facebook
  • Instagram
  • X / Twitter
  • YouTube

© 2025 · Generation Iron · Disclaimers · Privacy Policy · Accessibility