Intermittent time-restricted feeding in middle-aged mice: muscle strength and mitochondria
In middle-aged mice, time-restricted feeding during the inactive phase was linked to better muscle strength and stable basal blood glucose in early aging, alongside muscle-fiber-type-specific changes in mitochondria. This is an animal study reported in an abstract. [1]
Automatic summary · not editorially reviewed
The key findings
In a middle-aged mouse model, time-restricted feeding during the inactive phase was reported to improve muscle strength and maintain basal glycemia during early aging. [1]
The reported effects were accompanied by a tendency toward higher succinate dehydrogenase expression and significantly reduced lipid droplet accumulation. [1]
The abstract describes muscle-type-specific adaptations of the mitochondrial network and of sarcoplasmic reticulum-mitochondria interaction in response to time-restricted feeding. [1]
The source at a glance
- Study type / format
- Animal study (abstract)
- Population / context
- Middle-aged mice
- Summary based on
- Study abstract
- Original publication
- July 17, 2026
Middle-aged mice and inactive-phase feeding window
The study examined skeletal muscle health in a middle-aged mouse model. Time-restricted feeding means all calorie intake is confined to a defined daily time window; here the window fell in the animals' inactive phase. The stated aim was to see whether changing only the daily feeding schedule could delay or lessen the decline in physical performance. The abstract frames this against sarcopenia, the age-related loss of skeletal muscle mass and function, and notes that molecular changes in the mitochondrial network can occur before symptoms appear.
Supporting source [1]
Strength, basal glycemia and lipid droplets in mice
According to the abstract, inactive-phase time-restricted feeding had beneficial effects on skeletal muscle: muscle strength improved and basal glycemia was maintained during early aging. There was also a tendency toward increased expression of succinate dehydrogenase, an enzyme the source names, and lipid droplet accumulation was significantly reduced. These effects are described as correlating with muscle-type-specific adaptations of the mitochondrial network and of the interaction between the sarcoplasmic reticulum and mitochondria. The abstract presents these as findings of the study, not as established causes of longer life.
Supporting source [1]
Abstract-only scope of the mouse feeding study
The abstract concludes that inactive-phase time-restricted feeding may be an easy-to-follow approach during middle age to maintain physical performance in early aging. It does not report sample size, the exact feeding window, the comparison group, the duration of follow-up or how strength and glycemia were measured. Because only the abstract was available, the full text was not reviewed, and details of study design and statistical uncertainty cannot be checked here. The results come from mice and do not show that the same schedule improves performance or health in people.
Supporting source [1]
How to interpret this
Abstract only; the full text was not reviewed. Sample size, feeding window, comparison group, follow-up and measurement methods are not reported in the abstract. Findings are from mice and do not establish human benefits.
Based on the study abstract; the full paper, tables and supplementary data were not reviewed.
Source & supporting passages
Briones-Manríquez F, Almarza G, Ramos B, Silva-Urbina MJ, Pesce L, Jeria V, Aranda J, Grau-Grass A, Díaz-Castro F, Bórquez JC, Videla LA, Basualto-Alarcón C, Tacchi F, Portal-Rodriguez M, Troncoso R, Cabello-Verrugio C, Del Campo A. · europepmc.org · July 17, 2026