Nandrolone doesn't heal regardless of what anecdotal data suggests in all the internet panels, in fact theres research stating there's little to no facts that it does just that, and it can cause greater damage because AAS actually weaken tendons and affect tensile strength of tendons that can/may be detrimental by causing failure with restriction of elongation..Nandrolone and other AAS that have a higher affinity to possibly aromatase by way of particular enzymes or the presence of certain metabolites (in the case for nandrolone back door E2 conversion by indirect effects) the increase of E1/E2 can yield more fluid in or around connective tissue assisting with a smooth, lubricated like relief feeling, but in no fashioning is it healing and can be greatly mistaken for just that and set someone up for the artificial sense of rejuvenate and recovery ultimately convincing them that they can lift heavy or longer only to turn around and create more tissue damage..It's a false sense of recovery, but rather just temporary relief from joint/tendon agitation... It's merely just a "ohhh,ahhh, that feels better" type of drug... However, due to this it can release tension and stress allowing the body time to self heal with decreasing inflammation and the employment of cartilage cells and collagen-rich extracellular matric known as the (ECM)..Your systems on response and recovery method, it's own self made glue..
Think of a toothache.. You can take all the pain killers you want and it may not assist at all, but once you take antibiotics and get rid of the infection and inflammation, the meds can assist there after.. With nandrolone your simply giving a cushion, allowing the region a break from constant agitation..Most cases the body will self repair within reason (genetics and age will dictate the speed and rate of self recovery)..