Everyone these days wants to optimise their workouts, but when a study seems too good to be true, it usually is Prof Devi Sridhar is chair of global public health at the University of Edinburgh Everyone these days wants to optimise their workouts, but when a study seems too good to be true, it usually is Prof Devi Sridhar is chair of global public health at the University of Edinburgh W e live in an increasingly polarised world – and I’m not talking about politics, I’m talking about exercise.