wendyrs, actually i lost 49pounds of weight with no exercise at all other than light home duties, so it's not about exercise but how we regulate how our body recieves & eliminates through our cells.
serviceu, the reason why you get head aches is you are right at the threshold of detoxification if you were to have a mild detox program or even use some alkalizing foods a bit more in your diet the head aches would be gone in 3 to 5 days & your body would feel more capable.
then you could use this symptom to tell you when you need to detox or cut down on coffee as i do.
anyone using a lot of caffeine should be careful not to cause themselves a magnesium deficiency or dehydration which can cause, believe it or not,weight gain.