your consultant had also to inform u too that steroid injections have a high risk of rupturing collagenous structures, as tendons are!!! So i dont understand why you MAY NOT follow a strengthening-stetching programme...In fact it will be dangerous if u ve taken many times steroid injections in your tendon, to start a rehabilitation programme....If something then goes wrong your physician will blame the physiotherapist,when in the meantime tendon may have weakened because of the injections...We ve seen this "scene" many times in practice
Bear in mind, that tendinopathies are not true INFLAMMATORY procedures, as many people believe...I am saying this to give u an example, why some times the use of steroid or any form of NSAD is futile and pointless!