Happy you are seeing more Positive results helping your body heal !
The idea of Exercise and it's proper utilization to provide for the most Positive results, instead of Negative Results may Depend upon how the exercise is done ?
When we exercise for too long of a time to the point of becomming worn out, this type of exercise may Cause more Acids to be formed in our body than the amount of oxygen taken in !
If we exercise for shorter time periods rapidly to get our breathing deeper and then take breaks to Rest, this type of exercise may provide for more Oxygen than what is needed to Neutralize the Acids created, thus Causing the body to become more to the Alkaline side, because of this Extra Ozygen !
As usual not everything may be as it may first seem to be !