ESPN Sport Science video: BJ Penn with fNIR
Sport Science brings in former UFC Lightweight champion B.J. Penn to demonstrate the impact of the rear-naked choke on host John Brenkus and uses the fNIR System from BIOPAC to measure oxygen supply to the frontal cortex during the exercise; EEG and heart rate were also recorded. John’s heart rate drops from 124 to 80, respiration drops 55%, and electrical activity in the brain reduces by 65% during the 9-second choke. John’s body reboots after the choke out to normal levels in just 3 seconds. Click here to watch Sport Science: BJ Penn.
![BJ PENN ESPN BIOPAC data BJPenn-fnir](https://www.biopac.com/wp-content/uploads/BJPenn-fnir.jpg)
![BJ PENN BIOPAC EEG fNIR EEG and heart rate during BJ Penn choke out](https://www.biopac.com/wp-content/uploads/Penn-choke-out-Brenkus.jpg)
![BJ PENN chokeout fNIR data fNIR analysis of BJ Penn chock out on SportScience host](https://www.biopac.com/wp-content/uploads/BJPenn-chokeout-fnir.jpg)
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