Hi Lollyj. Im the same age as you and in the same situation. Be patient and your muscle pain should improve. I started a similar fitness regime in February and its now a lot easier than it was.Biggest help Ive found is remembering to stretch after each walk or other exercise session. I dont do much - just quad, calf and ankle stretches but it really helps and when I forget, that's when I seize up. Well done for making the changes though ! If you keep at it you'll reap rewards 😊😊😊 xx