Dietitian's corner

[Dgas]

Cut back on the snark, hotshot. It's neither smart nor necessary.

 

Got a bit confused on the meaning of snark so at the risk of sounding snarky I looked it up on Wikepida. Now I am even more confused. Anyway I refrain from the mentioning of mythical creatures, boats, aircraft, etc........as that had nothing to do with cycling at all.

 

"Fictional creatures"

 

- Snark (Lewis Carroll), a fictional animal species in Lewis Carroll's The Hunting of the Snark (1876)

- Snark (Half-Life), fictional small, bug-like species of alien used as a weapon

- Zn'rx, a race of fictional aliens in Marvel Comics publications, commonly referred to as "Snarks"

- Corporal Snark, a minor character in Catch-22 (1961) by Joseph Heller

- A species of creature in The 100 Lives of Black Jack Savage

-The Snark, fictional alien machine that visits Earth in the novel In the Ocean of Night (1977) by Gregory Benford

- A fictional creature from the TV series The Troop

- A fictional creature from the book series A Song of Ice and Fire, fictional even in the fictional world

 

"Aircraft and missiles"

- SM-62 Snark, an American intercontinental nuclear cruise missile

- Sopwith Snark, a British experimental fighter plane

 

"Ships"

-Snark, an experimental rescue submersible in the film Gray Lady Down (1978)

-The Snark, a yacht described in Jack London‍ '​s book The Cruise of the Snark (1911)

- Snark sailboat, a small, inexpensive, and lightweight sailboat

- MV The Second Snark, historically a shipyard tender, now in service as a cruise boat and ferry

- USS Snark (SP-1291), a United States Navy patrol boat in commission from 1917 to 1919

 

Other

- Snark (graph theory), a type of graph

- SNARK (theorem prover), a computer program

-.Succinct Non-interactive ARgument of Knowledge, a cryptographic tool for producing short proofs of statements without revealing any additional information

- Snark, an Open Source BitTorrent client

- Snark (2009), a book by film critic David Denby

- Snark, computer game published in the book What to Do After You Hit Return or P.C.C.'s First Book of Computer Games (1977) by Bob Albrecht

- Snark, a late 70s moped produced by F.I.V. Edoardo Bianchi

- Snark, snarky, or snarkiness, terms referring to sarcastic remarks.

[Dgas]

I can assure you that he has read that, as well as many more papers.

 

This is a great topic, lets not spoil it with snarky remarks and assumptions on peoples knowledge.

 

Lets await a response and be constructive about this.

Absolutely agreed that we should discuss the topic. As a matter of interest how do you know what he has read?

[Dgas]

Using a formula that I have, which builds in body weight, your long ride expends about 16606kJ or 3969 kcal. Using the calculator found at  http://www.tribology-abc.com/calculators/cycling.htm , the long ride burns off 20287Kj or 4842 kcal. So the 15000kJ might be a slight underestimation of your energy expenditure.

 

Your indoor energy expenditure of 5800 + 9300 is spot on according to my calculations.

 

I think you most certainly have the basics covered, and the fact that your weight has been stable also indicates this.

 

I know your wife might give me stick, but you could lose a few more kg and derive many benefits in doing so, both cycling and healthwise.

 

Perhaps worth thinking about is the situation of averaging your weekly energy requirements and taking in a similar amount every day. Obviously post workout nutrition would be slightly different, but this approach removes the need to consume large amounts in one day just to maintain one’s weight. I’d also say that listening to your body and eating slightly intuitively on workout days is also important. Hope this helps?

Thanks for the response, really interesting. On another post you mention that you do DNA testing on your clients, why and how does that affect diet or weight loss?

[Dgas]

Using a formula that I have, which builds in body weight, your long ride expends about 16606kJ or 3969 kcal. Using the calculator found at  http://www.tribology-abc.com/calculators/cycling.htm , the long ride burns off 20287Kj or 4842 kcal. So the 15000kJ might be a slight underestimation of your energy expenditure.

 

Your indoor energy expenditure of 5800 + 9300 is spot on according to my calculations.

 

I think you most certainly have the basics covered, and the fact that your weight has been stable also indicates this.

 

I know your wife might give me stick, but you could lose a few more kg and derive many benefits in doing so, both cycling and healthwise.

 

Perhaps worth thinking about is the situation of averaging your weekly energy requirements and taking in a similar amount every day. Obviously post workout nutrition would be slightly different, but this approach removes the need to consume large amounts in one day just to maintain one’s weight. I’d also say that listening to your body and eating slightly intuitively on workout days is also important. Hope this helps?

Thanks for the link to the spreadsheet. Takes a lot of the guess work out and gives me some faith in my Garmin, which I have now replaced by a SRM power meter. That does show kJ, but the numbers that I am getting seem to be kJ delivered not consumed. Could you expand on deliver vs consumed?

[Patchelicious]

Absolutely agreed that we should discuss the topic. As a matter of interest how do you know what he has read?

Has it occurred to you that I might know him?

[Dgas]

Has it occurred to you that I might know him?

Absolutely occurred to me. Was just asking in case you were proposing that, if it is said on The Hub, it must be the truth.

[Sports Certified Dietitian]

Thanks for the link to the spreadsheet. Takes a lot of the guess work out and gives me some faith in my Garmin, which I have now replaced by a SRM power meter. That does show kJ, but the numbers that I am getting seem to be kJ delivered not consumed. Could you expand on deliver vs consumed?

Have to be honest that in a non-clinical sense I haven't heard of kJ being delivered. I could be wrong, but perhaps it needs to be put into context i.e. 2000 kJ delivered to perform x amount of work? Let's see what others in the know have to say about this.

[Sports Certified Dietitian]

Thanks for the response, really interesting. On another post you mention that you do DNA testing on your clients, why and how does that affect diet or weight loss?

Since the mapping of the human genome, genes are being discovered that play specific roles in health and sport. There are a few battery of tests that target specific genes where there is ample evidence showing their role in our bodies. So for example there is a test for weight maintenance that tests many genes which play a major role in controlling our weight. It targets absorption, metabolism, satiety, insulin sensitivity, exercise responsivenes, sleep patterns, fat storage etc. By knowing which genes you have, you can ideally alter your diet and "switch on" favourable genes while "switching off" less favourable scenarios.

 

Perhaps if a few people at least are keen to hear more about DNA testing for health and performance I can discuss it this week and go into more detail?

[Dgas]

Since the mapping of the human genome, genes are being discovered that play specific roles in health and sport. There are a few battery of tests that target specific genes where there is ample evidence showing their role in our bodies. So for example there is a test for weight maintenance that tests many genes which play a major role in controlling our weight. It targets absorption, metabolism, satiety, insulin sensitivity, exercise responsivenes, sleep patterns, fat storage etc. By knowing which genes you have, you can ideally alter your diet and "switch on" favourable genes while "switching off" less favourable scenarios.

 

Perhaps if a few people at least are keen to hear more about DNA testing for health and performance I can discuss it this week and go into more detail?

I am really interested in knowing more about the subject.

[Captain Fastbastard Mayhem]

Since the mapping of the human genome, genes are being discovered that play specific roles in health and sport. There are a few battery of tests that target specific genes where there is ample evidence showing their role in our bodies. So for example there is a test for weight maintenance that tests many genes which play a major role in controlling our weight. It targets absorption, metabolism, satiety, insulin sensitivity, exercise responsivenes, sleep patterns, fat storage etc. By knowing which genes you have, you can ideally alter your diet and "switch on" favourable genes while "switching off" less favourable scenarios.

 

Perhaps if a few people at least are keen to hear more about DNA testing for health and performance I can discuss it this week and go into more detail?

Yes, please do...

[Mntboy]

Since the mapping of the human genome, genes are being discovered that play specific roles in health and sport. There are a few battery of tests that target specific genes where there is ample evidence showing their role in our bodies. So for example there is a test for weight maintenance that tests many genes which play a major role in controlling our weight. It targets absorption, metabolism, satiety, insulin sensitivity, exercise responsivenes, sleep patterns, fat storage etc. By knowing which genes you have, you can ideally alter your diet and "switch on" favourable genes while "switching off" less favourable scenarios.

 

Perhaps if a few people at least are keen to hear more about DNA testing for health and performance I can discuss it this week and go into more detail?

Yes please, that would be very interesting.

 

Have been following your thread from the start and some very informative comments have been made. Have really learned a lot from reading what everyone's had to say.

[Sports Certified Dietitian]

Yes please, that would be very interesting.

 

Have been following your thread from the start and some very informative comments have been made. Have really learned a lot from reading what everyone's had to say.

Glad you enjoying the thread.

 

Okay, then that's settled. I shall focus, perhaps for the next few weeks, on the area called Nutrigenomics i.e. how our nutrition effects our genes, and how our genes express themselves determines our health and sporting performance in the end.

[cadenceblur]

Guys, can anyone give some guidance, I've started using My Fitness Pal and have a query around the calories calculation. I train with a power meter and the Garmin gives a Calorie figure in the power section and also in the summary. Which does one use? The summary figure is drastically higher than the WORK figure in the power section.

[openmind]

Recent credible science (Robert Lustig et al) has shown that the whole calories in vs calories out "balance" is a myth - basically "a calorie is not a calorie". What they mean by that is that expending 100 calories of work on the bike does not "burn" 100 of the food calories that you ate. They are only vaguely related as the metabolic process is highly complex and cannot be reduced to calories in vs calories out. A calorie of protein is metabolised very differently to a calorie of fat, for example, and that is again influenced by a host of other factors. 

 

The implications are that tools like MyFitnessPal are useless. It could well be that the mere act of noting what you eat makes you more conscious of your diet and keeps it in check. It's far more likely that this indirect placebo effect is what gives the results rather than having kept your supposed calories in equal to your calories out. 

 

My experience has confirmed this. (Ok, I know, sample of one, anecdotal and all.) About two years ago I modified my diet by cutting back refined carbs and eating more saturated fat. I lost 6kg but can assure you that my food calorie intake (as e.g. MyFitnessPal would measure it) *increased* without a commensurate increase in exercise. 

 

Here's a good explanation:

http://www.huffingtonpost.com/robert-lustig-md/sugar-toxic_b_2759564.html

[cadenceblur]

Thanks, will have a look.

But I hear you on the behavioural changes it brings about.

[Dgas]

Thanks, will have a look.

But I hear you on the behavioural changes it brings about.

I use " My Fitness Pal" and it works for me. I do realize that calories used while excersizing are not quite the same as calories consumed. On days that I do not train I make sure I don't go over my food calorie target for the day. On days that I excersize I make sure that I have at least 2000 kJ " left over " after eating. It helps to log everything that you eat and drink as it makes you realize how it all adds up. i now plan my meals well in advance.