Muscle Strengthening sessions should be a minimum of 8-10 exercises using the major muscle groups. Ideally use some sort of resistance (such as a weight for arm exercises) and do 8-12 repetitions of each exercise. The level (weight) of each exercise should be so that you can do 8-12 repetitions before the muscle group gets tired. So, for example, for the upper arm muscles, hold a weight in your hand and flex (bend) your arm up and down 8-12 times. This should make your arm muscles tire.
Persons, who battle hypothyroidism, normally have to deal with sudden weight gain or obesity. In addition to these afflictions, other symptoms of hypothyroidism include: heart problems, joint pains, fatigue, and cold intolerance.