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There are two forms of exercises for building strength, isotonic and isometric exercises. Isotonic exercises are those where your muscles are working against resistance, such as that supplied by gravity, water, weights, rubber bands, or your own body weight.

In isometric exercise, muscles are contracted and relaxed without movement of the joints. An example is when you place your palms together in front of you (in a prayer position) and push them together. Isometric exercises are very useful for RA patients who are limited by disability and pain.

Your PT will help you develop a program of isometric and/or isotonic strength exercises that are appropriate to your needs and abilities

Every person should have a regular exercise program specifically tailored to their abilities and needs. The goal of regular exercise is to achieve and maintain optimal health and physical functioning. Regular exercise, including exercises for strengthening muscles, stretching (range of motion), building endurance, and improving coordination and balance, can be useful in managing many of the symptoms that commonly affect people with RA, including fatigue, stiffness, pain, and weakness. Regular exercise is an important key for maintaining joint and bone health.

Exercise also provides general health benefits to people who are at increased risk for cardiovascular disease and osteoporosis (loss of bone with increased risk for fracture). Exercise can help you maintain cardiovascular health, strengthen muscles, and maintain your bones.
In addition, regular exercise can help lift your mood and spirits, improve your outlook on life, improve your sleep, and help prevent the onset of depression and other mental health conditions that commonly affect persons living with chronic autoimmune disease.