Jim Stoppani, PhD, is one of the world's most recognized and popular authorities on training, nutrition and dietary supplements. He was the Senior Science Editor for Muscle & Fitness, Flex, and Muscle & Fitness HERS magazines for over 10 years and has trained some of the top celebrities in the world, including Dr. Dre, LL Cool J and Mario Lopez. Stoppani runs his own membership-based website JimStoppani.com, which features all of his exclusive training and diet programs, videos and articles, and he's the owner and creator of the ground-breaking JYM Supplement Science line of sports nutrition products. As a published author, his book credits include the New York Times Bestseller LL Cool J's Platinum 360 Diet and Lifestyle and the acclaimed educational text Encyclopedia of Muscle & Strength.
Jim Stoppani, PhD
Dr. Jim Stoppani's $25,000 Summer Shred Challenge is LIVE.
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1 week ago | [YT] | 32
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Jim Stoppani, PhD
Which of the following can happen after you drink about 500 mL of water?
1 month ago | [YT] | 40
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Jim Stoppani, PhD
Is ROM overrated? 👀
A 2025 study compared isometrics vs full ROM for quad growth in trained lifters.
6 weeks. Same effort. Same time under tension.
Results:
• Isometrics: +2%
• Full ROM: +1%
Not statistically significant… but interesting.
Isometrics grew double — just not enough time to prove it definitively.
In the video, Dr. Jim Stoppani explains what this actually means for your training — and how to test it yourself.
Have you ever trained isometrics for growth?
2 months ago | [YT] | 7
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Jim Stoppani, PhD
True or False — Creatine is more dangerous than a placebo?
2 months ago | [YT] | 21
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Jim Stoppani, PhD
Creatine, Finished.
Not Reinvented.
Creatine + Blood Flow Boosting Nitrates. A full 5g creatine dose combined with 500mg dietary nitrates for strength, power, endurance, and muscle pumps in one stimulant-free formula.*
🔥 If you’re serious about maxing out your workouts, this is your go-to.
jymsupplementscience.com/products/creatine-plus
2 months ago (edited) | [YT] | 19
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Jim Stoppani, PhD
A major new analysis on CREATINE just dropped. 📊
This changes the conversation.
Watch this before you decide. 👀
2 months ago | [YT] | 11
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Jim Stoppani, PhD
Do you slow down your negative reps to build more muscle?
2 months ago | [YT] | 35
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Jim Stoppani, PhD
💥 Ready to hit full-body arms like never before? 💪
We’re breaking down Triceps & Biceps Supersets from the Superman Remastered Program — every rep, every set, step by step.
2 months ago | [YT] | 5
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Jim Stoppani, PhD
⏱️ What if you could get the same muscle and strength gains in almost half the time?
New research just confirmed it—and it involves supersets.
I break down a 2025 meta-analysis of 19 studies showing how supersets stack up against straight sets.
Do you train with supersets—or avoid them? 👇
2 months ago | [YT] | 13
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Jim Stoppani, PhD
Do elbow sleeves actually help you lift more?
A 2025 study says yes.
More weight. More reps. Less elbow stress.
Watch the full video and see what the science says.
4 months ago | [YT] | 7
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