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In this March 23, 2011 free audio episode: The Central Governor with Dr. Tim Noakes, is non-alcoholic beer healthy, receding gum lines, serum vs. free testosterone, isometric ab exercises, how to raise natural hormone levels in women, and indoor cycling workouts.

Remember, if you have any trouble listening, downloading, or transferring to your mp3 player just e-mail ben@bengreenfieldfitness.com. And don't forget to leave the podcast a ranking in iTunes - it only takes 2 minutes of your time and helps grow our healthy community! Just click here to go to our iTunes page and leave feedback.

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Featured Topic: "Tim Noakes Tells You How You Can Use The "Central Governor" To Tap Into Your Muscle's Hidden Potential." In this interview with Dr. Tim Noakes, who has written multiple books on physiology, including "Lore of Running", which you can view more about by clicking here, Ben talks to Noakes about the central governor theory and asks:

Can you describe the central governor model?

What are examples of this model in sports today?

In consideration of this model, how can athletes advantageously modify their training and racing protocols?

What type of research are you doing now on this subject?

This is a can't miss interview for anyone who wants to learn how to exercise harder, longer and faster using the principles of the central governor theory.

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Listener Q&A:

====================================== [contact-form 3 "AskBen"] ======================================

Jeff has a call-in question about non alcoholic beer. Cara asks: I read the book Digestive Wellness and the author states that receding gum lines in the mouth are due to bone loss. I eat paleo (no dairy) but I do eat plenty of vegetables and strength train. Is that enough to prevent bone loss? My gums are receding and seem to be getting worse. I had been taking AdvaCal Ultra 1000 as a supplement. Should I not supplement with any calcium or do something different?

Gerry asks: I know you've talked about serum testosterone in the blood. Is there a direct relationship between serum levels and free testosterone levels? If so, how strong in the correlation? My serum testosterone levels are at 84

Julie asks: Hey Ben. I had some back surgery on L4/L5 and L5/S1 a few months ago. My doctor cleared me to start exercising but recommended avoiding all exercises that involve a crunching or pike motion. Can you outline effective and safe abdominal and lower back exercises that are isometric in nature? Right now all I can think of is the plank. Are upright rotational movements okay for spinal injuries (such as the woodchopper exercises)?

Liz has a call in question: I am a 33 year old active female. I run an average of 40 miles per week, and I just qualified for Boston with no small thanks due to your Marathon Dominator package (awesome, by the way!). I am pretty lean, at about 5'6" and 117lbs. I also lift weights 5 days per week. I stopped getting my period about a year and a half ago, and although irregular menstration runs in my family, and it did coincide with a significant rise in my general fitness level, my doctor recently prescribed a ten day dose of Progesterone to induce a period. I was wondering if you could offer any nutritional guidelines for helping to raise my hormone levels naturally.

In my response to Liz, I recommend EnerEssence I.

Kris asks: Personally Indoor bike session are painful I would much rather be outside. My question to you is how long is a fair amount of time to spend on the bike trainer, and what kind of drills, intervals etc can I do on the trainer?

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Remember, if you have any trouble listening, downloading, or transferring to your mp3 player just e-mail ben@bengreenfieldfitness.com And don't forget to leave the podcast a ranking in iTunes - it only takes 2 minutes of your time and helps grow our healthy community! Just click here to go to our iTunes page and leave feedback.

Brand new - get insider VIP tips and discounts from Ben - conveniently delivered directly to your phone! Just complete the information below...

First Name Last Name Email Cell # (1+area code):

Scroll down to donate anything over $15 to the show, and Ben will send you a BenGreenfieldFitness.com t-shirt...you can also conveniently donate any amount with your phone by simply clicking here.

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