Real gem.
Down to earth explanation.
Practical guidance how to get office worker to counter act on decades of desk-dwelling and get him runner's body.
Precise mobility/flexibility/balance/injury risk assessment with pictures with explanation and follow up steps often with progression for each possible assessment outcome.
Mind that where a problem manifests might be far from the actual cause. The book will break it down to you and get you to find what it is and fix it.
I followed the advice and got outstanding improvement in running economy - which has been professionally quantified.