8 weeks of EEG neurofeedback reduce stress markers and improve executive functions in elite athletes, randomized controlled trial, Arns et al. 2022.
This randomized controlled trial by Arns et al. (2022), published in Applied Psychophysiology and Biofeedback (DOI 10.1007/s10484-022-09537-3), specifically examines the impact of neurofeedback on cognitive performance and stress management in elite athletes practicing precision and rapid decision-making sports.
The originality of this study lies in its target population, athletes whose baseline neurophysiological profile is already optimal, and in the simultaneous measurement of objective markers (EEG, salivary cortisol) and subjective markers (stress questionnaires, measured sports performance).
The results demonstrate that even highly performing individuals can benefit from neurofeedback, by improving their flow state, their ability to manage competitive pressure and their executive functions under cognitive load.
Double-blind RCT with sham-control (non-contingent feedback). 64 athletes randomized: 32 in the active neurofeedback group, 32 in the sham group. Duration: 8 weeks, 2 sessions/week of 45 min.
SMR/beta training (13-21 Hz) at Cz for motor inhibition and concentration. Theta suppression (4-8 Hz) at Fz to reduce mind wandering. 16 sessions in total with threshold adjustment every 4 sessions.
Resting EEG (19 channels): evolution of theta/alpha and theta/beta ratios. Morning salivary cortisol (before and after the protocol). Heart rate variability (RMSSD) during standardized stress tasks.
Executive function tests (Stroop, TMT-B, N-back 3). Validated questionnaires: PSS-10 (stress), PANAS (affect), Flow State Scale. Sport-specific measurements (accuracy, decision time, real-competition performance).
This study is particularly relevant to our approach, because it targets a population resembling many of our clients: individuals already performing at a high level who seek to break through a new ceiling rather than treat a pathology. It demonstrates that the performance glass ceiling can be pushed back even for the best.
The simultaneous reduction in cortisol and improvement in executive functions illustrate the central mechanism of neurofeedback applied to performance: by training the brain to maintain a state of calm vigilance (high SMR, low theta), the neurophysiological conditions for flow are created, that state where optimal performance occurs without excessive conscious effort.
In our practice, we apply exactly this SMR/beta protocol for our patients: competitive athletes, traders, surgeons, trial lawyers, all professionals whose performance depends on rapid decisions under pressure.
The decrease in EEG theta/beta ratio is one of the biomarkers we track session by session to objectify each patient's progression and adjust the protocol in real time.