I assume it's additional strain or has something to do with to much range of motion but was looking to understand better.
212338
There is something a little bit precarious about pitching from a mound...Stepping forward and down at the batter in the midst of a aggressive pitching motion while wearing cleats.  The throwing mechanics of the pitching motion can mostly be duplicated on flat grounf and allow the recovering pitcher to keep his arm lively while not risking any sort of slip from the pitching rubber.  I liken it to a flight simulator training for pilots before going up in the actual plane.
201838
Usually due to a chemical imbalance in the muscle.
208181
Could be something to do with the joints of your ankles. You should get that checked out.
350459
They had that on an episode of Mythbusters.  The ball travelled less further because of the decrease in mass and no change in volume.  It was more susceptible to air resistance.
377045
Well one possible reason is the mind's ability.. or rather tendency to limit the amount of power expended by the muscle groups.  The body naturally limits how much stress is placed on any muscle in the body at times of use. This is to prevent damage to the body - uncontrolled most muscles could pull loose or damage the connections and even break bones in your body.  In time of severe stress this can often be overcome by other chemicals (such as adrenalin) - I guess you have all heard of little old ladies lifting cars off injured people (maybe not little old ladies but certainly normal people see web link below) - this is due to the system over-riding the normal limitations applied and allowing the body to work to extremes...\n\nSo, let us assume that those not quite the full shilling as you put it (nor sure how many readers know what a shilling is!!) Lets assume their mental faculties are not operating at the same level, then it may be the case that the subconscious operations are equally limited.. thus allowing more use (and more liable to injury) of the muscles in both normal and extreme conditions.\n\nPerhaps it may also have to do with demonstrating emotions in a different manner!\n\nBut I do agree with you, my wife works in a special needs school and is often speaking of the strength of even the youngest kids.\n\nWell, thats my thoughts anyway...
671915
Sounds like you are subconsciously making up for the slight immobility in your leg. I can understand why it would cause foot pain, especially in the Achilles tendon, since your inertia as you move would be causing you to be hyperextending your foot. It's probably also connected to the knee pain. You may have developed a habitual limp. Anyone who's ever injured their knee or ankle has experienced the same sort of feeling. I can imagine that this feels completely abnormal though, or else you wouldn't have been describing it here. If you have BlueCross BlueShield, I know that specialists are covered without recommendation under "special office visits". You should have an orthopaedist do an xray to ensure that your cartilage isn't developing elasticity and that it's not flipping around a bone or growth. He should also watch your walk and see what habits you may have developed. Do you have a cane? I've learned that this can cause a weekness in certain muscles, causing others to over-compensate.
149444
Depends also if it is muscle or fat.  The muscle can overcome the inertia & air friction.
63813
It's probably a wash. The weight of the body is distributed over twice the number of legs, so each leg has to do less work. More legs, though, mean that there's more energy required to move them all. The more legs thing could be cut down depending on the gait.
643956
Maybe it has something to do with the actions you're making.  When you're timing yourself out of water, you're just sitting there right?  But when your under water, you're treding or moving in some sort?  Try timing yourself when your walking around the house or jumping up and down....the blood takes in more oxygen(which means you need more) when its pumping faster.  Just an idea!
449393
i'm not completely sure, but i think that it has something to do with negative spins and all that. \n\nthe best thing to do would be to ask your teacher.  he's the one that would now the best...
66616
I think it is also because of the wrong angle while jumping, the timing and when to part the feet.
500349
I suspect it's something simple.  I think because of the way your arm joints work, when you release the board with your right hand, for example, the board will have a very slight horizontal inclination to the left, which will eventually cause it to turn in the air and veer to the left.\n\nIt will be interesting to hear what someone with a knowledge of biology or physics will say though.  :)
161428
you could possibly have a pinched nerve. or you might just need to stretch more.
675413
I may be way off base with this, but I had a friend who had a similar problem.  They got the problem when they started lifting heavy weight.  One time (and there wasn't any pain during the incident), they lifted something and it tore the tissue in their tail bone.  Same symptoms, when they sneezed, sat, or sqautted down and picked things up, it hurt them.  It's something to look into, at least.
396198
Increase your elevation or find a court with less gravitational force.   It's  a physics thing.
296065
Its not uncommon the main reason for this is stress alot of excess stress can cause your body to strain its self. nothing to worry about your just going threw some changes in life.
311730
Could be poor circulation.