SNR #176: Eric Trexler - Citrulline & Nitrate Supplements for Performance

Sigma Nutrition Radio

Danny Lennon

Sigma, Dietetics, Evidencebased, Nutrition, Training, Health & Fitness, Science, Diet, Fitness, Evidence, Bodybuilding, Health

4.8 • 626 Ratings

🗓️ 25 April 2017

⏱️ 52 minutes

🔗️ Recording | iTunes | RSS

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Summary

Eric Trexler is a PhD student at UNC Chapel Hill, under Dr. Abbie Smith-Ryan. He has a research focus on how exercise and nutrition affect metabolism, performance, and body composition. Eric comes from a background in natural bodybuilding, powerlifting, and strength coaching, and currently holds certifications in sports nutrition (CISSN) and strength and conditioning (CSCS). Eric completed his undergraduate degree at The Ohio State University, and his master’s degree at UNC Chapel Hill.
In This Episode We Discuss:

Proposed mechanisms of action of citrulline
Citrulline malate vs. L-citrulline
Nitric oxide "boosters"
Why arginine is ineffective
Dietary nitrates and nitrate supplementation via beetroot/pomegranate
What athletes might this work for?
Research on cordyceps supplementation for exercise performance

Transcript

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0:00.0	And it turns out a lot of the arginine that we take orally gets biode, it gets degraded in the gut before it really makes it out into systemic circulation.
0:16.7	And so people then kind of shifted the focus from arginine and started looking more at citoline,
0:22.6	which is involved in the same pathway of nitric oxide formation.
0:28.6	And you can look at blood flow's effect on exercise from both perspectives.
0:31.6	You could say, well, it enhances flow to the muscle, which will probably deliver the important things we need to fuel activity.
0:39.3	On the flip side, you could say after you're done, it probably helps clear out some of those metabolites that
0:45.3	contribute to fatigue and soreness. Hello and welcome to Sigm Sigma Nutrition Radio as always.
1:15.6	I am your host, Danny Lennon, and you are listening to episode 176 today.
1:22.6	And just in a short moment, I'm going to be talking to a researcher who has been absolutely
1:28.4	cranking out research, like there's no tomorrow over the past couple of years.
1:33.5	Eric Trexler from the University of North Carolina in Chapel Hill.
1:39.1	Eric is working in the lab there under the tutelage of Dr. Abbey Smith, Ryan, who was on this podcast way, way back
1:47.2	in, I think, episode 20 something a few years ago. And so really great group there. And Eric
1:54.5	is being kind of an integral part of some of the research they've been publishing over the
1:59.1	past couple of years, which, like I said, is at quite a phenomenal rate.
2:03.3	Eric's focus is mainly on research related to either body composition or diet and supplementation for athletic performance.
2:13.0	And that's where we're really going to dive in today and look at some of the various different supplements that have been evaluated in the literature over the past number of years, some more emerging
2:22.8	ones, some that can potentially have a benefit for performance and training in various different
2:29.4	types of activities and we'll dive into all that stuff in this episode. But before things do kick off,
2:36.4	let me again mention something that may be of interest to some of you that are based in Europe.
2:41.8	The European Powerlifting Conference is being held in Ireland this July. So that's July 1st and
2:46.9	2nd this year. It's going to be a two-day event where you're going to be able to
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