The present disclosure relates to optimizing an individual's heart-rate cycle using a biofeedback system so as to facilitate coherence and resonance, by which a subject's emotional state, stress levels and performance may be concurrently improved. In an embodiment, a biofeedback system and method as disclosed herein accesses an individual's current coherence state and based upon that analysis, provides an environment related to the individual's current coherence state and allows the individual to progress to alternative environments that represent “better” or more coherent states. A biofeedback system can include a heart monitor and an RR interval monitor that provide information related to the individual's HRV. A biofeedback system can be conveniently portable and therefore used at most any location so as to afford the individual the ability to decrease their stress level and/or improve their state of mind as desired.
