I love to walk, but i have been having trouble. i feel tired, like i just don't have energy. i push myself to walk but later get spasms in my foot & ankle really bad. only ice give me relief. could this be related to low potassium or calcium? body weak

Need to examine: It is not feasible to provide a meaningful opinion without taking additional history, physical examination and may be some tests. It would be prudent to see your doctor and discuss if you may be depressed. Counter-intuitive as it may seem, exercise may help. Start with low intensity exercise such as walking and gradually increase the intensity as tolerated. Wish you good health!