Bill Campbell

  • Professor of Exercise Science at the University of South Florida

Credentials

  • PhD in Exercise, Nutrition, and Preventive Health

Education

  • PhD in Exercise, Nutrition, and Preventive Health – Baylor University (2007)

Affiliations

  • University of South Florida

Research Focus

  • Human performance, dietary supplements, nutrition strategies for optimal health and physical performance

Notable Publications

  • International Society of Sports Nutrition Position Stand: Diets and body composition (2017)
  • Effects of High vs. Low Protein Intake on Body Composition and Maximal Strength in Aspiring Female Physique Athletes Engaging in an 8-Week Resistance Training Program (2018)
  • The effects of ketogenic dieting on skeletal muscle and fat mass (2014)

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Awards & Honors

  • 2019 NSCA Nutrition Research Award (2019)
  • 2017 ISSN Fellow (2017)

Key Contributions

  • Developed a systematic research approach to determine the optimal nutritional strategies for physique athletes.
  • Provided significant evidence in support of higher protein intakes for aspiring female physique athletes.

Contact

bcampbell@usf.edu

He Studies Fat Cells… and Says High Protein Diets Just Got EVEN Stronger for Fat Loss – Dr. Campbell
Unlocking Potential: Protein's Impact on Muscle Growth and Fat Loss 0:00 0
“i've never read a study where subjects when they've increased their calories from protein alone and their resistance training they have never gained body fat”

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He Studies Fat Cells… and Says High Protein Diets Just Got EVEN Stronger for Fat Loss – Dr. Campbell
Unlocking Potential: Protein's Impact on Muscle Growth and Fat Loss 0:27 0
“so the the the things that come right to mind are exercise um i look at protein as a as a lipolytic nutrient caffeine so those those are the again in my world that i that i focus on”

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He Studies Fat Cells… and Says High Protein Diets Just Got EVEN Stronger for Fat Loss – Dr. Campbell
Unlocking Potential: Protein's Impact on Muscle Growth and Fat Loss 1:56 0
“i remember specifically um i think it was around 2014 2015 i read a study um joey antonio um he's a professor at nova southeastern he gave resistance trained males and females really high protein um it was like 3.3 gram per kg he did another study where it was up to 4.4 gram per kg”

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He Studies Fat Cells… and Says High Protein Diets Just Got EVEN Stronger for Fat Loss – Dr. Campbell
Unlocking Potential: Protein's Impact on Muscle Growth and Fat Loss 4:13 0
“the high protein group gained more lean mass not surprising that's what how we view protein but they lost a significant amount of body fat relative to baseline”

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He Studies Fat Cells… and Says High Protein Diets Just Got EVEN Stronger for Fat Loss – Dr. Campbell
Unlocking Potential: Protein's Impact on Muscle Growth and Fat Loss 7:09 0
“if you struggle with hunger my advice is if you're going to overeat overeat on protein because the outcomes are not as negative than if you're getting takis”

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He Studies Fat Cells… and Says High Protein Diets Just Got EVEN Stronger for Fat Loss – Dr. Campbell
Unlocking Potential: Protein's Impact on Muscle Growth and Fat Loss 7:44 0
“excess protein can be deposited as body fat so it can happen but I've not seen this in like actual applied human research.”

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He Studies Fat Cells… and Says High Protein Diets Just Got EVEN Stronger for Fat Loss – Dr. Campbell
Unlocking Potential: Protein's Impact on Muscle Growth and Fat Loss 7:58 0
“it's almost like it's a nutrient partitioning agent where the calories are being shuttled more towards lean tissue”

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He Studies Fat Cells… and Says High Protein Diets Just Got EVEN Stronger for Fat Loss – Dr. Campbell
Unlocking Potential: Protein's Impact on Muscle Growth and Fat Loss 10:27 0
“the best strategy is to approximately equally distribute your total daily protein intake throughout the day”

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He Studies Fat Cells… and Says High Protein Diets Just Got EVEN Stronger for Fat Loss – Dr. Campbell
Unlocking Potential: Protein's Impact on Muscle Growth and Fat Loss 12:24 0
“the study gave subjects 25 zero grams or 25 grams of protein or 100 grams of protein immediately after a resistance training workout”

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He Studies Fat Cells… and Says High Protein Diets Just Got EVEN Stronger for Fat Loss – Dr. Campbell
Unlocking Potential: Protein's Impact on Muscle Growth and Fat Loss 13:29 0
“as we age we need more protein to get the same anabolic benefit”

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He Studies Fat Cells… and Says High Protein Diets Just Got EVEN Stronger for Fat Loss – Dr. Campbell
Unlocking Potential: Protein's Impact on Muscle Growth and Fat Loss 14:29 0
“the 25 gram dose got i think it was 4 and a half grams of the 25 grams made it to the skeletal muscles”

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He Studies Fat Cells… and Says High Protein Diets Just Got EVEN Stronger for Fat Loss – Dr. Campbell
Unlocking Potential: Protein's Impact on Muscle Growth and Fat Loss 15:01 0
“the 100 gram dose it was something like 13 g out of the 100 made it to the end point of skeletal muscle”

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He Studies Fat Cells… and Says High Protein Diets Just Got EVEN Stronger for Fat Loss – Dr. Campbell
Unlocking Potential: Protein's Impact on Muscle Growth and Fat Loss 19:20 0
“it was liberating for me because for a long time i i would think that i had this upper limit of realistically like 50 60 grams you know it was probably like where i would go on the top end for me in one sitting particularly like when i would break a fast after 24 hours or something”

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He Studies Fat Cells… and Says High Protein Diets Just Got EVEN Stronger for Fat Loss – Dr. Campbell
Unlocking Potential: Protein's Impact on Muscle Growth and Fat Loss 19:51 0
“i can break a fast i can have a 50 gram whey protein shake and then i'll follow that up with a bunch of ground beef and i'll get myself to 125 grams then all i have to do is get you know another 75 grams throughout the next few hours and i'm i'm kosher i'm good”

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He Studies Fat Cells… and Says High Protein Diets Just Got EVEN Stronger for Fat Loss – Dr. Campbell
Unlocking Potential: Protein's Impact on Muscle Growth and Fat Loss 20:11 0
“there was a significant increase in muscle protein synthesis in the 100 g versus the 25 gram so 25 gram was like 20 30% higher than zero grams of protein and then the 100 gram was 20% higher than the 25 g”

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He Studies Fat Cells… and Says High Protein Diets Just Got EVEN Stronger for Fat Loss – Dr. Campbell
Unlocking Potential: Protein's Impact on Muscle Growth and Fat Loss 21:56 0
“whey protein um it is insulinogenic that there is a pro there when you consume whey protein there is an insulin spike and also a glucagon increase as well that we don't get with carbs”

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He Studies Fat Cells… and Says High Protein Diets Just Got EVEN Stronger for Fat Loss – Dr. Campbell
Unlocking Potential: Protein's Impact on Muscle Growth and Fat Loss 24:53 0
“in those studies where they gave nonresistance training women extra protein and they lost body fat that was a scenario where they were eating very low protein initially and they brought it up to optimal even less than optimal so when you improve a suboptimal protein intake and you improve their protein that is when we saw these”

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He Studies Fat Cells… and Says High Protein Diets Just Got EVEN Stronger for Fat Loss – Dr. Campbell
Unlocking Potential: Protein's Impact on Muscle Growth and Fat Loss 25:55 0
“caffeine obviously increases lipolysis but it's not necessarily increasing oxidation i have seen some papers that there's like a subtle increase in oxidation too but maybe that just comes from the downstream effect of moving more as a result of caffeine”

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He Studies Fat Cells… and Says High Protein Diets Just Got EVEN Stronger for Fat Loss – Dr. Campbell
Unlocking Potential: Protein's Impact on Muscle Growth and Fat Loss 31:35 0
“we've published four different studies on the acute effects of caffeine containing thermogenic supplements and I think in every one heart rate stayed and again it's not these weren't odd findings but again it goes against logic right don't I would think I feel like my heart's beating a lot more but not as much as what you would think.”

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He Studies Fat Cells… and Says High Protein Diets Just Got EVEN Stronger for Fat Loss – Dr. Campbell
Unlocking Potential: Protein's Impact on Muscle Growth and Fat Loss 32:44 0
“we gave subjects a what I'm calling a thermogenic fat loss supplement... giving subjects this thermogenic supplement and like every other study where you give them caffeine either caffeine alone or as part of a multi-ingredient supplement metabolic rate increased 8% over hour 1 hour 2 hour three.”

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He Studies Fat Cells… and Says High Protein Diets Just Got EVEN Stronger for Fat Loss – Dr. Campbell
Unlocking Potential: Protein's Impact on Muscle Growth and Fat Loss 34:39 0
“at the end of the 8-week study the caffeine group lost significantly more body fat... it was 1.1% body fat where the placebo group lost nothing.”

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He Studies Fat Cells… and Says High Protein Diets Just Got EVEN Stronger for Fat Loss – Dr. Campbell
Unlocking Potential: Protein's Impact on Muscle Growth and Fat Loss 37:54 0
“definitely yeah usually sip on green tea during my workout too”

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He Studies Fat Cells… and Says High Protein Diets Just Got EVEN Stronger for Fat Loss – Dr. Campbell
Unlocking Potential: Protein's Impact on Muscle Growth and Fat Loss 38:06 0
“occasionally find myself the energy drink kind of thing sometimes happens where it's like one one or two bad nights of sleep like especially if like i'm on a trip or something and i'll go be like: okay i can i can justify a little energy drink today i'll drink like a quarter of it and then i like felt kind of good you know and then next thing you know then you're drinking a half of one.”

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He Studies Fat Cells… and Says High Protein Diets Just Got EVEN Stronger for Fat Loss – Dr. Campbell
Unlocking Potential: Protein's Impact on Muscle Growth and Fat Loss 38:24 0
“then by the time i get to drinking a full can this happens multiple times throughout the year then i'm like: okay i need to stop cold turkey go away from it cut out caffeine entirely and come back.”

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