A way to get off a plateau and see results in muscle tone is to vary positions and angles. Different muscles fibers are stimulated. Here are some examples:
1. See the biceps blog on how to vary sets by turning your writes inside or outside.
2. For the pectoral muscles, when using free weights on a bench, hold them with your palms facing you and do four sets of ten repetitions, and then repeat with your palms facing upward. For the chest press, sometimes use a machine where you can squeeze the handles together at the end of repetitions. For the bench press, vary where you hold the bar.
3. For latissimus dorsi, when you use the latissimus dorsi pulldown machine, vary where you hold the bar. The same is true for the machine with the hanging bar.
4. For the leg press machines, vary where you put your feet. See that blog.
My third book, Pocket Guide to Fitness, is available on http://www.authorhouse.com and http://www.amazon.com. If you look up my name on those Web sites, you will find my other books The Boy in a Wheelchair and Life, Work and Play: Poems and Short Stories. These two books are on my Web site http://www.louizapatsis.com.
Disclaimer: None of the above information can be taken as a substitute for advice from a medical professional such as a physician.