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There are plenty of sources of calcium outside of dairy products. These include fruits, vegetables, beans, cereals, some types of orange juice, etc.
If your son is also eating fish, meats and eggs, then he's also getting some vitamin D from the diet which is required for the maintenance of blood calcium. Vitamin D is also formed from a byproduct in the formation of cholesterol (which your body makes naturally) in reaction to sunlight -called cholecalciferol (i.e. your son's body will make vitamin D while playing ball in the sun!). Younger children also have a lower requirement for calcium than older adults.
Hope this helps some, try not to fret the calcium too much!
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| Posts: 22 | Location: St. Maarten, Netherlands Antilles | Registered: November 26, 2007 |    |
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HSBBWeb Old Timer
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I'd suggest tracking eat habits and seeing how much calcium (or any other vitamin, mineral, etc) you (or your son) is getting. MyPyramid.gov has a tracker that you can use. It's free  I think many people would be surprised at what they actually do get! I have been doing it the last few days, and while it's not the greatest out there probably, it works. I have gotten an average of 730.225 mg of Calcium without consuming any milk. The recommendation is about 1000 mg but I would guess it might be a little higher for athletes.
"The Harder You Work, The Harder It is to Surrender"
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| Posts: 869 | Location: Waterloo, IL--Cape Girardeau, MO | Registered: February 05, 2006 |    |
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Member
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quote: Originally posted by leftypitcher08: its prolly lactic acid build up. his calcium levels probably aren't that low. cereals have calcium as do some vegetables.
Lactic acid is good, not bad. http://www.maxxtraining.com/forum/viewtopic.php?t=89&highlight=lactic%20acid (Read JarHead's post and MAXX's post on Dec 20, 2006, 10:42 am)
"In great attempts, it is glorious even to fail."
"They call it coaching but it is teaching. You do not just tell them…you show them the reasons."
"The harder you work, the harder it is to surrender." -Vince Lombardi
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| Posts: 230 | Location: Minnesota, USA | Registered: September 05, 2005 |    |
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Member
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A lot of those lactic acid posts are giving me a bad itch!! I'll outline the entire process so that everyone is in the know.
The first step in producing energy in the muscle is the breakdown of glycogen to glucose. The glucose is then utilized for energy (as an aside - when all of your glycogen stores have been depleted, your body then dips into your fat stores to produce energy). Glucose undergoes a series of reactions (collectively termed glycolysis) creating pyruvate. Pyruvate can do a few of different things from here. First, when enough oxygen is present, energy can be made in the mitochondria in the form of ATP (pyruvate is converted to acetyl-CoA which enters the citric acid cycle, producing NADH which is the required to produce energy). Pyruvate can also be shuttled into lactic acid when little oxygen is present.
The buildup of lactic acid during strenuous exercise is actually a survival mechanism that humans have adapted over the course of evolution. Converting glucose --> pyruvate <---> lactic acid is another way to create energy when the citric acid cycle is not active (this is when there is a deficiency of oxygen in the working muscle and therefore a diminished usage of NADH in the mitochondria, since oxygen is required to make ATP, or energy). I tend to disagree with some points in the article (the link above) - it should be that an athlete can use oxygen more efficiently than the non-athlete, thereby reducing lactic acid production (instead of the athlete's ability to "absorb more lactic acid"). In the presence of plenty of oxygen, very little lactic acid will be produced. Glycogen is not converted to lactic acid until there is a lack of oxygen. All of these pathways turn each other on and off depending on the amount of energy production of the muscle cell.
In other words, when you're short on oxygen, it's difficult for mitochondria to produce energy. Because this pathway isn't working, the pyruvate is diverted to create lactic acid, which builds up in working muscle in a shortage of oxygen. The muscle burning is due to a drop in blood pH as a result of the lactic acid buildup. This is actually where creatine comes in handy (creatine is kind of a storage unit for ATP). This allows you to use energy for a longer period of time during anaerobic exercise without the burning and fatigue.
The cramping obviously would go away once your muscles have received enough oxygen to burn off the lactic acid (lactic acid is routed back through pyruvate, through the citric acid cycle producing NADH and therefore producing energy in the mitochondria). The soreness after about 12-24 hours is a result of the microtears in the muscle.
Got it? Basically, in a working muscle without oxygen (anaerobic, like during sprinting), your body will produce lactic acid as a way to make energy (by producing NADH, from which energy is made). The soreness is also a survival mechanism in order to preserve the function of the muscle.
I know it's complicated, but that's how it works. I hope this helps a little.
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| Posts: 22 | Location: St. Maarten, Netherlands Antilles | Registered: November 26, 2007 |    |
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