Settle this once and for all....

calf raises or eccentric calves? seen a pfaff pdf document with one of the vague heading he must of talked about in his presentation was “eccentric calves are good”

Did he start recommending this before or after donovan bailey achilles blowout?

For myself i started off the deteriorating tendon process on my left achilles 2 years back. Did eccentric/concentric heel raising/lowering(with forefoot on step) as rehab to stretch and strengthen up the achilles so I could sprint again. I stopped doing them once I started sprinting again and was able to sprint train 2X a week for about 6 weeks before my left achilles fucked up again. Now if I want to remain sprint training I have to remain doing these ‘eccentric calves’. My theory is if I stop doing them I lose mobility and range of motion in the plantarflexed and dorsiflexed directions, then when this happens too much trauma is put on the achilles. Something like that.