Forbes et al. 2022: Creatine and Resistance Training Meta-Analysis in Older Adults

TL;DR — Forbes et al. 2022

Forbes, Candow, Ostojic, Roberts, and Chilibeck published a systematic review and meta-analysis in Nutrients (2022) examining whether creatine supplementation augments the effects of resistance training on lean body mass in older adults. Pooling data from 721 participants across multiple studies, they found that creatine plus resistance training increased lean mass by 1.37 kg more than resistance training with placebo (SC et al., 2022) . This is strong evidence that creatine is a practical tool against age-related sarcopenia.

Background

Sarcopenia — the progressive loss of muscle mass and strength with aging — is a major public health concern. Adults lose approximately 3-8% of muscle mass per decade after age 30, with the rate accelerating after 60. Resistance training is the primary intervention, but strategies that enhance its effectiveness are valuable.

Previous individual studies by Candow et al. (2014) had suggested creatine enhances training outcomes in older adults (DG et al., 2014) . Forbes and colleagues sought to quantify this effect through meta-analysis.

Study Design

This was a systematic review and meta-analysis of randomized controlled trials that compared creatine plus resistance training against placebo plus resistance training in adults over 50 years old. The primary outcome was change in lean body mass. The authors followed PRISMA guidelines and registered the review protocol in advance.

Inclusion criteria:

• Randomized controlled trials
• Participants aged 50 years or older
• Creatine monohydrate supplementation
• Resistance training program of at least 4 weeks
• Lean body mass measurement by validated method (DXA, BIA, or similar)

Key Findings

1. Creatine increased lean mass by 1.37 kg above placebo

The pooled effect across all studies showed a statistically significant increase of 1.37 kg in lean body mass when creatine was added to resistance training compared to resistance training alone.

2. Duration mattered

Studies lasting 12 weeks or longer showed greater effects than shorter interventions. This aligns with the understanding that muscle building is a gradual process enhanced by sustained creatine saturation.

3. Consistent effects across subgroups

The benefit of creatine was observed consistently regardless of sex, initial training status, or specific resistance training protocol. This supports broad applicability of creatine supplementation in aging populations.

Practical Implications

1. Creatine amplifies resistance training results: For older adults already doing resistance training, adding 3-5 g/day of creatine monohydrate meaningfully increases muscle gains
2. Longer supplementation yields greater benefits: Committing to at least 12 weeks provides the most substantial lean mass improvements
3. Affordable intervention: Creatine monohydrate is one of the least expensive supplements available, making it accessible to elderly populations
4. Complement to exercise: Creatine does not replace resistance training but makes it more effective

Malaysian Relevance

Malaysia’s population is aging rapidly. By 2030, Malaysia is projected to become an aging society with 15% of its population over 60. Sarcopenia prevention strategies are becoming increasingly important for Malaysian healthcare. Creatine monohydrate, at approximately RM 30-50 per month, represents an affordable intervention that can be combined with exercise programs at community fitness centers.

The ISSN position stand supports creatine supplementation across the lifespan (RB et al., 2017) , providing further confidence for its use in elderly Malaysians.

Limitations

• Heterogeneity existed across studies in terms of training protocols and duration
• Most participants were from Western populations, with limited data from Asian demographics
• Functional outcomes (strength, mobility, fall risk) were not the primary focus of this meta-analysis
• Individual variation in creatine response may affect real-world results

Full Citation

Forbes SC, Candow DG, Ostojic SM, Roberts MD, Chilibeck PD. Meta-analysis examining the importance of creatine ingestion strategies on lean tissue mass and strength in older adults. Nutrients. 2021;13(6):1912. doi:10.3390/nu13061912

Study Design and Methodology

Understanding how a study was designed helps assess the strength of its conclusions. Key methodological factors to evaluate include:

• Sample size — larger studies (n=50+) provide more reliable results than small studies (n=10-15). Small sample sizes increase the risk of false positives and limit the ability to detect moderate effect sizes
• Study duration — creatine research requires adequate duration for muscle saturation (minimum 4 weeks for maintenance dosing, 1 week for loading). Studies shorter than this may miss the full effect
• Blinding — double-blind, placebo-controlled designs (where neither researchers nor participants know who receives creatine) are the gold standard for minimising bias
• Population studied — results from trained athletes may not fully apply to untrained individuals, and vice versa. Age, sex, and dietary habits (particularly vegetarian status) also influence creatine response
• Outcome measures — direct measures (muscle biopsy, MRS imaging) are more informative than indirect proxies (blood markers, performance tests) for assessing creatine uptake and metabolism

Clinical Implications and Practical Relevance

This research contributes to our understanding of creatine in several practical ways:

For athletes and fitness enthusiasts: The findings support the use of creatine monohydrate as a safe, effective ergogenic aid. The standard dosing protocol of 3-5g daily remains well-supported by the cumulative evidence base including this study.

For healthcare professionals: Understanding the specific mechanisms and safety data from studies like this helps clinicians provide evidence-based guidance to patients who ask about creatine supplementation. The research consistently shows a favourable safety profile at recommended doses.

For the Malaysian context: While most creatine research is conducted in Western populations, the fundamental biochemistry (ATP-phosphocreatine system) is universal. Malaysian consumers can apply these findings with confidence, adjusting for local factors like tropical climate (increased hydration needs) and halal dietary requirements (synthetic creatine monohydrate is permissible).

How This Fits Into the Broader Evidence

No single study should be used to make definitive claims about creatine supplementation. Instead, this research should be viewed as one piece of a much larger evidence base:

• The ISSN Position Stand (2017) synthesises hundreds of studies into comprehensive recommendations
• Multiple systematic reviews and meta-analyses confirm creatine’s effects on strength, power, and lean mass
• Long-term safety data spanning up to 5 years shows no adverse effects at recommended doses

For a complete overview of the evidence, explore our Research Library which covers 60+ landmark creatine studies.

Sources & References

This article is based on the meta-analysis by Forbes et al. published in Nutrients (2022) and contextualized with Candow et al. (2014) and Kreider et al. (2017). All citations reference PubMed-indexed publications.

Further Reading

• creatine dosage guide
• creatine safety profile
• creatine monohydrate
• creatine for muscle building
• creatine loading phase
• buying creatine in Malaysia