The Method by Juli Zeh
Mia Holl lives in a state governed by The Method, where good health is the highest duty of the citizen. Everyone must submit medical data and sleep records to the authorities on a monthly basis, and regular exercise is mandatory.
Mia is young and beautiful, a successful scientist who is outwardly obedient but with an intellect that marks her as subversive. Convinced that her brother has been wrongfully convicted of a terrible crime, Mia comes up against the full force of a regime determined to control every aspect of its citizens' lives.