Bone spur(s)?
1. Eventually the elliptical bike are great ways to get back in shape without the pounding in running.
I can tell for you the hard part will be holding back and not going full tilt too soon.
Slow and steady wins the race - to full health.
2. It is amazing that after a warm up, even areas that are quite sore often feel much better.
I don't know exactly what is happening, but I suspect it could be a combination of factors.
Warmed up muscles are more elastic and supple. More force can be absorbed by the long muscle body, rather than being transferred to the tendon ending, especially if some degree of "spasm" is present in the muscle.
Exercise leads to increased blood flow and greater exchange of the [interstitial] fluid that bathes our tissues. The chemicals [cytokines] that are regulating the inflammation (and irritating the sensitive nerve fibers) are being "washed away" faster than new cytokines are being generated at the site.
Just to give you and everyone else an update on my issues (I can't quite call them "problems", because whatever the issue(s), they're not affecting my performance/recovery).
Back in December/January, I decided to take ~ month off to rest this injury, and just to refresh my mind and get away from the game. I have since resumed tennis with the same intensity. Nothing's changed, there is still no pain while I'm playing. I am not experiencing any limitations as for as stamina/duration, nor am I experiencing any lost in explosiveness.
However, the aftermath/shut-down pain discomfort remains.
I'm beginning to speculate that it's a bone spur causing me the aftermath/shut-down discomfort. I can recall one specific incident where I landed squarely on that heel, it was very painful at the time. I walked it off, but I am sure the discomfort began after that incident. I've had surgeries on my shoulder before, I know what soft tissue/tendon irritation should feel like, and this is not it at all.
I've ruled myself out of "Haglund's Deformity", I don't see a bulge on either side of my heel.
As an intern, I can't use my company insurance yet, so I'm doing some more home remedy, and it's actually working!
I'm icing more, and I'm stretching and strengthening my calves (lowering it on a step, then rising and hold for ~2seconds, 15reps).
If it is a bone spur, I would be hesitant on removing it. ESPECIALLY if it requires the detachment and re-attachment of the achilles tendon. (I'm sorry, but in my view, that's a bigger injury itself than some bone spurs).