Is walking good for me if i have fibromyalgia that results in shoulders cramps.and what is the range per week ? i walk for two hours 3days a week.?

Great: That amount is great. If you are not have any other symptoms like leg pain or chest pain. You may want to try some stretching exercises. Consider a session with a personal trainer to get some pointers. Many people forget about the benefits of stretching and light weight training.

Keep exercising: You should keep exercising but instead walk 30 - 60 minutes daily. You will experience less muscle and joint fatigue but still get the same health benefits.