If you can't change your job then change yourself . Get fitter and stronger both physically and mentally. Set new goals within the confines of the reality you live in . Achieve them . Tick off the boxes and regain hope and as much control of your destiny as you can realistically hope to achieve . If someone had suggested this to me three years ago I would have been angry at their lack of understanding at my plight . But after bumbling along seeking answers it's become clear that it works . If you are in a career long term that you once performed at a high level and we're perfectly capable of surviving the challenges of that role ...does the job really change , or is it that you have just become less well equipped to perform it . Fix yourself , fix all problems .