12-Week Resistance Training Reverses Frailty and Boosts Function in Centenarians
A supervised resistance exercise program improved physical performance and reduced frailty biomarkers in adults aged 100+, a first-of-its-kind trial.
Summary
Spanish researchers conducted the first exercise intervention trial in centenarians, enrolling 12 adults aged 100 or older in a 12-week supervised resistance training program. The intervention group showed meaningful gains in physical performance (SPPB and PPME scores) and reduced frailty (Fried Phenotype and FTS5 scales). Crucially, molecular biomarkers associated with frailty—including miR194-5p, miR125b-5p, miR454-3p, EGR1, IL-6, and IL-1β—showed distinct expression patterns in centenarians compared to younger and older adults, and these markers improved following the exercise intervention. The findings suggest that even at the extreme of human longevity, targeted resistance training can meaningfully restore functional capacity and modulate underlying biological drivers of frailty.
Detailed Summary
Centenarians represent the fastest-growing demographic segment globally and offer a unique window into extreme human longevity. While they experience fewer age-related diseases than typical older adults, they are not exempt from frailty—a state of physiological vulnerability associated with falls, hospitalization, and loss of independence. Until this study, no exercise intervention had ever been tested in this age group, leaving a critical gap in geriatric care evidence.
Researchers from Spain enrolled 19 institutionalized centenarians (aged ≥100 years) across geriatric nursing homes. Due to COVID-19 lockdowns, 7 participants dropped out, leaving 12 who were randomized to either a control group (usual care, n=6, all women) or an intervention group (n=6, 4 women). The intervention consisted of supervised resistance training twice weekly for 12 weeks—8 exercises per session, 1–3 sets of 8–10 repetitions at 50–70% of estimated one-repetition maximum, with biweekly load adjustments. Functional capacity was assessed using the Short Physical Performance Battery (SPPB) and Physical Performance and Mobility Examination (PPME), while frailty was evaluated with the Fried Frailty Phenotype and Frailty Trait Scale 5 (FTS5). Blood samples were collected pre- and post-intervention, and compared against samples from 44 older adults (mean age 79.5 years) and 34 young adults (mean age 29.1 years).
ANCOVA analyses demonstrated statistically significant improvements in the intervention group across all four functional and frailty measures: SPPB (post 5.0 vs. pre 2.3; p=0.01), PPME (post 6.5 vs. pre 3.8; p<0.001), Fried Frailty Phenotype (post 3.0 vs. pre 3.8; p=0.001), and FTS5 (post 30.7 vs. pre 34.0; p=0.05). The control group showed no meaningful change. Importantly, the molecular biomarker analysis revealed that centenarians had distinct expression profiles for frailty-associated miRNAs (miR194-5p, miR125b-5p, miR454-3p) and the transcription factor EGR1, as well as elevated inflammatory cytokines IL-6 and IL-1β, compared to both younger cohorts. Following the resistance exercise intervention, these biomarkers shifted toward healthier expression levels, suggesting a biological basis for the functional improvements observed.
Correlation analyses further strengthened the findings: SPPB scores correlated significantly with miR454-3p (ρ=0.73), while FTS5 scores correlated with miR454-3p (ρ=−0.83), IL-6 (ρ=0.60), and miR125b-5p (ρ=−0.55). These relationships suggest that these biomarkers may serve as objective molecular indicators of frailty severity and exercise response in very old adults.
This study is the first to demonstrate that resistance exercise is both safe and effective in centenarians, and that its benefits extend to the molecular level. The results challenge assumptions that extreme old age renders individuals non-responsive to exercise and open the door to exercise-based frailty management even at the frontier of human lifespan.
Key Findings
- 12 weeks of supervised resistance training significantly improved SPPB (5.0 vs 2.3) and PPME (6.5 vs 3.8) scores in centenarians.
- Fried Frailty Phenotype and FTS5 scale scores improved significantly (p=0.001 and p=0.05) in the exercise group vs. controls.
- miR454-3p, miR125b-5p, miR194-5p, EGR1, IL-6, and IL-1β showed distinct frailty-associated expression patterns unique to centenarians.
- Resistance training modulated frailty and inflammation biomarkers, suggesting molecular-level benefits beyond physical performance.
- miR454-3p strongly correlated with both SPPB (ρ=0.73) and FTS5 (ρ=−0.83), marking it as a promising frailty biomarker.
Methodology
Randomized controlled pilot trial with 12 centenarians (≥100 years) assigned to 12-week supervised resistance training (twice weekly, 50–70% 1RM) or usual care. Functional capacity was assessed via SPPB, PPME, Fried Frailty Phenotype, and FTS5; molecular biomarkers were measured by qRT-PCR and ELISA. Comparative biomarker data were drawn from cohorts of 44 older adults and 34 young adults.
Study Limitations
The sample size is very small (n=12 completing the trial) and the dropout rate was high (7/19) largely due to COVID-19 lockdowns, limiting statistical power and generalizability. The study was restricted to institutionalized centenarians, which may not represent community-dwelling individuals of the same age. Lack of a longer follow-up period prevents conclusions about durability of functional and biomarker improvements.
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