1 Isotonic -a muscle fiber contraction in which force production is unchanged when the muscle contracts causing movement of an external load.  Isokinetic -a muscle fiber contraction in which force production of the contraction is sufficient to overcome the external load.
HIV/AIDS. HIV Risk Behaviors. The risk of getting HIV varies widely depending on the type of exposure or behavior (such as sharing needles or having sex without a condom). Some exposures to HIV carry a much higher risk of transmission than other exposures.
Prisoners are at exceptional risk for infection with HIV because of the association of injection drug use with incarceration. Women prisoners who have practiced prostitution, which frequently is associated with injection drug use and contact with HIV-infected sex partners, are at additional risk for HIV infection.