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Beta-Alanine Does Not Enhance the Effects of Resistance Training in Older Adults. | LitMetric

AI Article Synopsis

  • A study explored the effects of beta-alanine on muscular endurance in older adults (60-82 years) participating in a 12-week resistance training program, using a randomized double-blind design with 27 participants.
  • While results showed no significant benefits of beta-alanine on most performance measures, there was a notable improvement in the leg press strength (1RM) for those doing resistance training.
  • The endurance-based resistance training positively influenced muscle performance variables like mechanical power and fatigue reduction, suggesting future research should test different dosages of beta-alanine and varied training protocols.

Article Abstract

To investigate the potential of beta-alanine to increase muscular endurance of elder individuals in specific resistance-training protocols, we randomly assigned 27 participants (60-82 years of age) to a 12-week double-blind intervention using 3.2 g/day beta-alanine or placebo with or without resistance training to determine the effects on anthropometrics, muscular performance, and activities of daily living (ADL). The endurance-based resistance-training program (ERT) was given three times per week and included two sets of 15-25 repetitions on 11 computerized pneumatic machines (alternating upper and lower body) at an intensity of 50% of maximum lifting weight (1RM). Mixed design analysis of variance (ANOVA) revealed no significant group × time interactions (p > .05) for any anthropometric or strength measures except 1RM leg press (p = .010). A post hoc analysis revealed significant improvements in 1RM leg press for both the resistance-training groups (p < .001) but no significant between-group difference attributable to beta-alanine. For the 20-repetition chest and leg press tests, no main effects of beta-alanine or group × time interactions for the exercise versus control groups were observed. Pairwise comparisons, however, did reveal significant improvements in peak and average power for both tests and fatigue index for the chest press in resistance-training groups. Although beta-alanine had no effect on any measures, the ERT program did positively affect three performance variables: 1RM, mechanical power, and fatigue patterns during muscular endurance testing. Future research should examine beta-alanine with different dosages and training programs to expand upon our findings using endurance-based resistance training.

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Source
http://dx.doi.org/10.1080/19390211.2017.1406422DOI Listing

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