Simple past tense and past participle of hyperextend.(verb)
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Use "hyperextended" in a sentence
"LHP Jo-Jo Reyes (hyperextended right knee) went on the 15-day disabled list retroactive to April 13. —"
"JaVale McGee also missed practice while dealing with the flu, but Kirk Hinrich returned after missing the past three games with a hyperextended right shoulder."
"The other problem: McKnight hyperextended his right elbow during the Washington game."