One tap arms the audio — then hands-free for the whole session
N-back training stresses working memory and inhibitory control. HIIT spikes BDNF — the plasticity molecule — creating a biochemical window. Training inside that window stacks cognitive load on top of neuroplasticity. The color stream adds a second independent channel (visuospatial), true dual n-back detectable via peripheral vision even while shadowboxing. Execute the N-back movement and the N-back color modifier simultaneously — that's PFC + striatum under cardio stress.