Poster E41, Monday, March 26, 2:30-4:30 pm, Exhibit Hall C
The acute effects of moderate-intensity aerobic exercise and high-intensity interval exercise on working memory
Shih-Chun Kao1, Joseph Ritondale2, Keita Kamijo3, Eric Drollette4, Naiman Khan2, Charles Hillman1; 1Northeastern University, 2University of Illinois at Urbana-Champaign, 3Wasada University, 4University of North Carolina at Greensboro
Existing literature has indicated facilitation of cognitive control during the recovery period following a single bout of moderate-intensity continuous exercise (MICE). Further, despite high-intensity interval exercise (HIIE) being known for its effectiveness toward improving health outcomes, little is known regarding the transient effects of HIIE on post-exercise cognition. Accordingly, this investigation compared the effects of acute HIIE and MICE on working memory; one aspect of cognitive control. Using a within-participants design, task performance (RT, response accuracy), slow wave positivity during memory encoding, and initial and terminal components of contingent variation negativity (iCNV, tCNV) during cognitive preparation were assessed while 36 young adults performed a modified Sternberg task following 20 minutes of rest, MICE, and HIIE on separate days in counterbalanced order. The results indicated shorter overall reaction time and increased iCNV amplitude, while no changes were observed for response accuracy, tCNV, or encoding-related slow wave amplitude following HIIE compared to rest. Interestingly, no behavioral or neuroelectrical changes were observed following MICE compared to rest and HIIE. Further, higher heart rate (i.e., beats per minute) prior to the Sternberg task was associated with larger iCNV amplitude. These findings suggest that a single bout of HIIE induced levels of arousal that may enhance attentional orienting and behavioral performance during a working memory task. Collectively, these findings demonstrate transient facilitating effects on working memory following acute bouts of HIIE, and provide evidence to support HIIE as a promising approach for enhancing cognitive control.
Topic Area: EXECUTIVE PROCESSES: Working memory