Journal Logo

F-65 Free Communication/Poster - Clinical Exercise Physiology - Other Friday, May 31, 2019, 1: 00 PM - 6: 00 PM Room: CC-Hall WA2

Inflammatory and Affective Responses to Acute Resistance Exercise of Varying Loads in Postmenopausal Women.

3174 Board #220 May 31 3:30 PM - 5:00 PM

Fairman, Ciaran M.1; Lustberg, Maryam B.2; Haynam, Marcy L.2; Kimborowicz, Anna2; Bartels, Josh2; Lantz, Michael2; Johnson, Sarah2; Maresh, Carl2; Kraemer, William J. FACSM2; Focht, Brian C. FACSM2

Author Information
Medicine & Science in Sports & Exercise: June 2019 - Volume 51 - Issue 6S - p 881
doi: 10.1249/01.mss.0000563132.59377.b8
  • Free

Resistance exercise (RE) is increasingly recognized as a powerful behavioral intervention that can improve key metabolic and cardiovascular risk factors among aging women. The manipulation of RE variables, such as repetitions and load, may illicit differing physiological and psychological responses to acute bouts of RE. Although differential responses to acute RE may influence training adaptations and subsequent motivation for regular RE participation, the effects of acute RE upon these outcomes in postmenopausal (PMW) have yet to be evaluated.

PURPOSE: To determine the effects of RE intensity on physiological, affective, and motivational outcomes in PMW.

METHODS: Thirteen PMW (Age: 59.23±11.3; BMI 29.99±4.55) participated in the study. Each participant completed 3 experimental conditions in a randomly assigned order. The low-load condition involved 3 sets of 12-15 reps at 55%-64% 1 repetition maximum (RM), with 60 seconds of rest between sets. The moderate load involved 3 sets of 8-12 reps at 65%-75% 1RM, with 90 seconds of rest between sets. The heavy load involved 3 sets of 3-6 reps at 80-90% 1RM, with 120 seconds of rest between sets. Assessment of inflammatory markers (IL-6, TNF-a) were obtained prior to, immediately after, 15 minutes and 30 minutes after each condition. Affective and motivational outcomes were assessed prior to, during, and at multiple timepoints following each condition.

RESULTS: Results revealed no significant (p > 0.05) differences in inflammatory markers or affective responses as a function of RE load. Furthermore, there was no significant differences (p > 0.05) in intention or self-efficacy between experimental conditions.

CONCLUSIONS: Acute bouts of RE at 55-64% 1RM, 65-75% 1RM and 80-90% 1RM yielded comparable inflammatory and affective responses in PMW. The similar responses to the varying loads of acute RE observed in this investigation may have valuable practical implications for RE prescription among PMW.

Copyright © 2019 by the American College of Sports Medicine