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.
What Increases Your Risk. Most people get HIV by having unprotected sex with someone who has HIV. Another common way of getting the virus is by sharing needles with someone who is infected with HIV when injecting drugs. You have an increased risk of becoming infected with HIV through sexual contact if you: 1  Have unprotected sex (do not use condoms). 2  Have multiple sex partners. 3  Are a man who has sex with other men.  Have high-risk partner(s) (partner has multiple sex partners, is a man who has sex with other men, or injects drugs).
So you claim to wear condoms most of the time, but when examining your most recent sexual romps, the details of them are a little hazy. Maybe you wore a condom, but maybe you didnât. Drugs and alcohol are one of the biggest risk factors when it comes to the spread of HIV. If you know that your likelihood of wearing a rubber decreases as the drinks start to flow, you may want to take a sobering look at just how risky your behavior may be.