Re: Why can't I get in shape?
I agree with the other poster, add magnesium to balance the calcium.
As to your sore legs after your walks, how much walking were you doing before this routine? You may be progressing too fast. Your body needs to be challenged, but even more it needs a rest period in which to repair strained muscles and to grow new ones. If you are challenging the same muscles every day, without a rest you are breaking them down without allowing them to be built up again. The older you are, the longer the rest period should be. Try doing these long walks every 3rd day. An intense work out is just a beneficial as a long one, try to find a route that has some hills even if it is not as far. Many trainers no longer recommend sit ups. It is too easy to hurt yourself. Try doing crunches instead and again, not every day. One last suggestion. Muscles need to be in balance, those days you are not doing sit ups try doing some upper back exercises. Talk to your doctor first. If you have back issues already, you want exercises that help, not ones that may make things worse. Lower back pain is something I occasionally suffer from too. I am the same age as you and gentle, gentle stretches can help. I find it is best it I try stretches I can do lying down, even in bed before getting up in the morning.
I hope this helps.