Muscle contraction is the activation of tension-generating sites within muscle fibers.In physiology, muscle contraction does not mean muscle shortening because muscle tension can be produced without changes in muscle length such as holding a heavy book or a dumbbell at the same position.n contrast, a muscle contraction is isotonic if muscle length changes but the muscle tension remains the same. Furthermore, if the muscle length shortens, the contraction is concentric.
Senior Systems Administrators with one to two decades of relevant experience report an average salary of approximately $85K. After two decades in the workforce, the average Senior Systems Administrator generally earns more than ever; median pay for this group is estimated at $92K.
Executive Administrator Salary. Executive Administrators in the United States tend to be well-versed in their field, and just below three-fifths have more than 10 years of experience. Average salary is expected to be around $54K annually, but may range from $32K to $81K per year. Cash earnings for Executive Administrators â which occasionally include more than $8K from bonuses and more than $8K from profit sharing â stretch from around $32K to approximately $81K.