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.
(ORAL SEX AND HIV/STD RISK, 2010). ...that of anal or vaginal sex, numerous studies have demonstrated that oral sex can result in the transmission of HIV and other sexually transmitted diseases (STDs) . Abstaining from oral, anal, and vaginal sex altogether or having sex only with a...