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PURPOSE: To investigate HRV and autonomic activity in intercollegiate explosive power (EXP) vs. sustained power and endurance athletes (SEN).

METHODS: A standard operating procedure was created to assess resting HRV and autonomic activity over 10-15 minutes in 27 Intercollegiate athletes (EXP n= 17, SEN n= 10). Data were sorted and analyzed by sport type using t-tests.

RESULTS: Despite a 43% variation, EXP athletes’ LF Power did not differ significantly from SEN athletes (p= 0.08); however, EXP had a significantly higher HF Power (56%) than SEN (p= 0.03). EXP did not differ significantly in HRV via Poincaré SD1 compared with SEN athletes (p= 0.09). LF: HF ratio was similar in all athletic types.