Exercise-Induced Hypoalgesia Is Not Influenced by Physical Activity Type and Amount

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Abstract

Purpose

This studied examined the EIH response to pressure stimuli among college-age women of differing activity levels.

Methods

Fifty women were tested. Pressure pain threshold (PPT) values were assessed before and immediately after isometric handgrip exercise to exhaustion in the right and left forearms. Participant's PA levels were assessed by wearing an accelerometer for seven consecutive days during waking hours, excluding water activities. Participants were classified into four PA groups: met the American College of Sports Medicine aerobic recommendations (AERO), met aerobic and resistance training recommendations (AERO + RT), insufficiently aerobically active but resistance trained (RT), and insufficiently active (IA) based on their measured and self-reported PA level and type.

Results

AERO and AERO + RT had greater vigorous (P < 0.001) and total PA (P < 0.001) compared with RT and IA. EIH was observed for PPT in both right and left arms (P < 0.001), with PPT increasing 7.7% (529 ± 236 vs 569 ± 235 kPa) and 7.0% (529 ± 299 vs 571 ± 250 kPa) in the right and left forearms, respectively. EIH did not differ among activity groups (P = 0.82). PPT values were found to be inversely related to vigorous-intensity PA (r = −0.29).

Conclusions

PA levels and types had no effect on endogenous pain inhibition after exercise in college-age women.

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