Tier 2 — strong

The effects of chronic betaine supplementation on exercise performance, skeletal muscle oxygen saturation and associated biochemical parameters in resistance trained men

John F Trepanowski, Tyler M Farney, Cameron G McCarthy, Brian K Schilling, Stuart A Craig, Richard J Bloomer
Journal of strength and conditioning research 2011 25(12):3461-3471

Bibliography

PubMed
PMID 22080324
DOI
10.1519/JSC.0b013e318217d48d
Funding
Funding was not specified in the indexed record or accessible funding metadata.
Competing interests
A competing-interest declaration was not available in the indexed record or accessible disclosure metadata.

Study snapshot

DesignRandomized crossover controlled trial
ModelHuman participants
SampleResistance-trained men; sample size not given in the indexed abstract
InterventionBetaine 2.5 g/day in a carbohydrate-electrolyte beverage versus placebo
Duration14 days per treatment; 21-day washout
EndpointsExercise performance; Muscle oxygenation; Biochemical markers

What the study showed, in plain terms

Published in 2011, this source examined exercise performance and body composition. Design: Randomized crossover controlled trial. Sample/model: Resistance-trained men; sample size not given in the indexed abstract. The exposure or intervention was Betaine 2.5 g/day in a carbohydrate-electrolyte beverage versus placebo. Follow-up or treatment period: 14 days per treatment; 21-day washout.

The main repeated-measures analysis did not show significant performance differences. Within-betaine improvements in bench volume and repetitions should not be confused with clear superiority to placebo.

Small short study with multiple analyses; within-group significance is weaker evidence than a treatment-by-time difference.

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Key findings

  • The main repeated-measures analysis did not show significant performance differences.
  • Within-betaine improvements in bench volume and repetitions should not be confused with clear superiority to placebo.
  • The recorded outcome domains were Exercise performance; Muscle oxygenation; Biochemical markers.
  • The result applies to the tested exposure: Betaine 2.5 g/day in a carbohydrate-electrolyte beverage versus placebo; 14 days per treatment; 21-day washout.

What this study can and cannot tell us

  • Small short study with multiple analyses; within-group significance is weaker evidence than a treatment-by-time difference.
  • An individual controlled trial must be interpreted alongside its comparator, sample size, endpoint selection and independent replication. It does not validate a different commercial formulation or a general longevity claim.
  • Source basis: Indexed abstract and bibliographic data. Missing method details, funding information or participant denominators are not inferred.

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Editorial review

Reviewed by the Biohack Blueprint research team

Last verified

Dr. Khaled Mahmoud, MBBChCritical Care Medicine, Longevity Science & Editorial Direction Dr. Amr Yasser, PhDCardiometabolic, Musculoskeletal, Gut & Bioavailability Dr. Abdulla Mostafa, PhDCellular Senescence, Neurological, Mitochondrial & Brain-Ageing Biology