Don't hyperextend your elbow.    From Wordnet, Princeton University. 

My joints hyperextend, and they -- they move too much.    From Wordnik.com.  [CNN Transcript Mar 8, 2009] Reference

It is a mistake, therefore, to try and hyperextend the scientific method to encompass questions beyond its domain.    From Wordnik.com.  [The Memory Hole] Reference

Sleeping in odd positions — the child may arch his neck backwards (hyperextend) in order to open the airway or sleep sitting up.    From Wordnik.com.  [Childhood Obstructive Sleep Apnea] Reference

Gross, who was on the Chargers 'practice squad last year, appeared to hyperextend his right knee at the end of an 8-yard carry.    From Wordnik.com.  [USATODAY.com - Football - San Diego vs. St. Louis] Reference

You hyperextend, and you turn your neck, you can get this injury by one blow, one blow, one hyperextension, turning of the neck -- it's not cumulative.    From Wordnik.com.  [CNN Transcript Jan 10, 2002] Reference

So there I'd be, explaining the best way to hyperextend a kneecap while telling about David bringing down old Goliath and how that fight was worth something.    From Wordnik.com.  [A Time To Every Purpose] Reference

Then there are his freak-of-nature traits, such as his elbows, which hyperextend a good 10 degrees past level, and his serpentine toes, which are, in a word, gross.    From Wordnik.com.  [MIGHTY MICHAEL] Reference

I hyperextend, as the muscles are pulled longer than they are supposed to be, this causes muscle pain, and my knees to go backward, and my shoulder to dislocate more often than others.    From Wordnik.com.  [4 paragraphs to explain my disease plus: Love a Puffin, Masturbate and living.] Reference

Riding head first can lead to a brain injury, and it's a good way to hyperextend the neck, says Kate Cronan, the head of emergency medicine at the Alfred I. duPont Hospital for Children in Wilmington, Del.    From Wordnik.com.  [Test-Driving a Sno-Park Maserati] Reference

The pair banged knees, causing Chavez's right leg to hyperextend.    From Wordnik.com. Reference

When stretching, be careful not to lock your joints or hyperextend.    From Wordnik.com.  [CBS 2 - KCAL 9 - Los Angeles - Southern California - LA Breaking News, Weather, Traffic, Sports] Reference

Swagger with a DDT to the injured leg as he tries to hyperextend the knee.    From Wordnik.com.  [PWInsider Latest Articles] Reference

This stabilizes your spine so you don't hyperextend it during downhill sections.    From Wordnik.com.  [Vail Daily - Top Stories] Reference

That can happen if you hyperextend your cspine (look all the way up) while squatting / deadlifting.    From Wordnik.com.  [www.hardwarezone.com.sg] Reference

It is very often seen in new moms because they hyperextend the thumb when holding their baby's head.    From Wordnik.com.  [The Full Feed from HuffingtonPost.com] Reference

Joe takes Angle down, but Kurt uses his legs to keep Joe's weight off him, and tries to hyperextend Joe's elbow.    From Wordnik.com.  [PWTorch.com] Reference

"It's not exactly the same as hyperextending it because there's scar tissue in there that won't let it hyperextend.".    From Wordnik.com.  [The Green Bay Press-Gazette Latest Headlines] Reference

Garnett has missed Boston's last 10 games with a hyperextend right knee, and the Celtics are glad to have him back tonight.    From Wordnik.com.  [Projo.com Projo Local News] Reference

Shoko Fukaki's "arm-crushing reverse cross" is a well drawn arm bar, a grappling lock that aims to hyperextend the elbow or shoulder.    From Wordnik.com.  [Ain't It Cool News - The best in movie, TV, DVD, and comic book news.] Reference

"Natalie, from the waist up, is really, really believable as a ballet dancer, but when you start getting into the 20 years you need to train legs to hyperextend and go on pointe, you run into problems," says the director, who used a pair of professional dancers as his star's double in the full-body performance shots.    From Wordnik.com.  [Phillies Zone] Reference

My joints hyperextend and they move too much.    From Wordnik.com.  [CNN Transcript Mar 8, 2009] Reference

Wow, Hannah, way to hyperextend that kid's elbow.    From Wordnik.com.  [SPARTACUS: episode 11] Reference

Thoroughbreds, conversely, tend to land flat-footed and hyperextend the fetlock within the first stride from the gate. ".    From Wordnik.com.  [TheHorse.com News]

Extend but do not hyperextend.    From Wordnik.com.  [Recently Uploaded Slideshows] Reference

Be careful not to hyperextend the child's neck.    From Wordnik.com.  [Recently Uploaded Slideshows] Reference

Do not hyperextend.    From Wordnik.com.  [Recently Uploaded Slideshows] Reference