Training & Nutrition - After Ride Nutrition (6 mile sprint)
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10-17-06, 02:08 AM
After a quick blast like this is an apple suitable carb to help with recovery ? or do I need somthing more balanced ?
10-18-06, 09:59 AM
Do you reckon that a six mile sprint needs any form of recovery eating at the end ?
10-18-06, 10:19 AM
A six mile all-out TT is pretty taxing. Probably around 12-15 minutes of full bore effort, so I'd get a little something in my stomach afterward.
An apple with some natural peanut butter should do the trick. That gives you some carbs and some fat and protein to balance it out.
The protein in peanut butter is very low and the bv of that protein is even lower, the apple idea is great and I like the idea of fat as well but would recommend some walnuts or macadamia nuts (much more omega 3) and some whey or egg protein. The other thing to consider is waiting a little longer as sprinting will usually illicit the release of gh and this can be suppressed by eating to soon post workout may want to wait an hr. I have lots of supporting data on this if interested.
10-18-06, 12:02 PM
link to supporting data?
NP, I will dig it up when I get a moment.
To be honest there are good arguments for both sides so I will post and be my own devils advocate just bear in mind that there is money to be made with post workout suplements.
Solving the post-workout puzzle I (http://www.johnberardi.com/articles/nutrition/puzzle_1.htm)
Solving the post-workout puzzle II (http://www.johnberardi.com/articles/nutrition/puzzle_2.htm)
I usually TRY :) to wait one hr to eat post workout it really depends on your goals
Also I forgot if the goul is to replenish muscle glycogen post workout an apple ie high fructose may not be ideal as that will tend to go to liver glycogen as apposed to muscle glycogen
Our bodies can only absorb monosaccharides (glucose, galactose, or fructose), the single units of sugars and starches. Once absorbed through the small intestines into the portal vein, and then circulated into the bloodstream through the liver as blood glucose, our bodies can put glucose to work in three ways:
1. It can burn the glucose immediately for energy if blood glucose levels are not at a stable level of 20 grams blood borne glucose circulating per hour.
2. If it is not needed for energy immediately, then it is converted into glycogen in the liver or muscles. The liver has the capacity to store 100 grams of glycogen. The muscles have the capacity to store between 250-400 grams of glycogen, depending on muscle mass and physical condition. Liver glycogen supplies energy for the entire body. Muscle glycogen only supplies energy to muscles.
3. If the body has an excess of glucose, and all of the glycogen stores are full, the surplus glucose is converted to fat by the liver and stored as adipose tissue (bodyfat) around the body. If needed, fatty acids can be burned as fuel (BUT the fat cannot be converted back to glucose).
Now that we have outlined how our bodies use glucose, we will discuss why fruit (fructose or fruit sugar) is detrimental in an attempt to maximize fat loss. Since muscles have the specific purpose of contraction, they have a limited number of enzymes for glycogen synthesis. Muscle only has the necessary enzymes to convert glucose (and nothing else) into glycogen. The liver, however, is able to make glycogen from fructose, lactate, glycerol, alanine, and other three-carbon metabolites. Muscle glycogen, which is similar in structure to starch, is an amylopectin (branched chained polymer containing hundreds of glucose units). Unlike muscles, which can only supply energy to themselves through the stored 250-400 grams of glycogen, the liver is responsible for supplying energy to the entire body.
If you have fruit, fruit juice, or any of its derivatives, the following conditions occur:
Referring to the three ways the body uses glucose, assuming that blood glucose levels are adequate, the glucose will then be stored as glycogen. Muscle does not have the necessary enzymes to synthesize fructose into glycogen; therefore the liver converts this fructose into liver glycogen. It would only take three, 8-ounce glasses of orange juice to fully replenish liver glycogen stores. Since the liver is responsible for supplying energy to the entire body, once its stores are full, a rate limiting enzyme in glucose metabolism which is responsible for signaling the body to store glucose as glycogen or convert it to fat (phosphofructokinase), signals the body that all stores are full. If the glycogen stores are signaled as full, then the third way our body uses excess glucose is to convert it to fatty acids and store as adipose tissue. In essence, fruit sugar is easily converted to fat.
Many may be asking why then is fruit low on the glycemic index? If it does not cause a sudden release of insulin, then how could it ever be a poor food choice? Once the fructose (fruit sugar) enters the liver and liver glycogen is already full, then it can not be used by the muscles for glycogen or energy production. It is converted to fat and released back into the bloodstream to be stored as adipose tissue. The low glycemic response is based on the fact that fructose leaves the liver as fat, and fat does not raise insulin levels.
This is the biochemistry behind the recommendations to limit fruit in your diet. As mentioned, fruit is a very nutritious food full of vitamins, minerals, fiber, and low in calories and fat. If your goal is to exclusively to minimize bodyfat, then it is advisable that you consume more complex carbohydrates, which will go to replenishing muscle glycogen stores rather than fruit, which will only replenish liver glycogen stores, and is useless in muscle glycogen replenishment.
10-20-06, 03:37 AM
Many thanks, as weight is a present a concern I will avoid the apple as a after ride boost,
but my findings so far with eating the apple when I reach my car is that I do not raid the fridge and cupboards when I arrive back home so maybe it is better to have that apple rather than empty the fridgeon a carb hunt.
Is there somthing that will give me that full feeling that the apple does but go to muscle rather than the liver and fat production as outlined above ?
10-20-06, 05:33 AM
If your goal is to exclusively to minimize bodyfat, then it is advisable that you consume more complex carbohydrates, which will go to replenishing muscle glycogen stores rather than fruit, which will only replenish liver glycogen stores, and is useless in muscle glycogen replenishment.
Very informative. This explains exactly why so many americans who consume/prefer soda to water are almost always overweight.
Question: I have not checked out your links so if this is covered be patient with me.
This problem would be obvously more accute for non-athletes, so for athletes it is simply more advisable to consume reasonable amont of fruit prior to working out than post, right? Even so, because your body has burned off calories and glycogen it would still need replacing? One question further: even though it is better to generate glycogen stores that can more easily be converted to glucose for mussles, if your goal is NOT weight loss and you train regularly, does maintaining a workout glucose level <20 really matter for non-pro athletes that are not trainng for a TT? It seem that the excess would be relativly small...
I hope this made sense...
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