The purpose of this research is to find out how pain sensation may change in the Achilles tendon after the use of manual physical therapy. The testing itself will use a device that gradually produces a sensation of heat or cold on your skin, which we will place directly over your Achilles Tendon. You will let the researcher know when the heat or cold becomes what you would describe as "slight discomfort," at which point the pressure will be stopped. Testing will be completed three (3) times in a row. The device has built-in programming which ensures that the heat or cold applied will be safe, even though it may be briefly uncomfortable. After this first testing the researchers will perform 1-3 repetitions of the ankle joint mobilization/manipulation. This technique involves the researcher providing a small quick stretching movement downwards at the ankle. This is a common therapeutic technique utilized by Physical Therapists, chiropractors, and physicians and is considered very safe. After this treatment we will perform the same measurements of hot and cold discomfort on your Achilles tendon
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Heat and Cold Thresholds
Timeframe: Baseline and 1 hour