Micronutrients & recovery
In older adults (65-83 years), higher habitual physical activity is significantly associated with lower intramuscular noncontractile (fat) content, whereas this relationship is absent in young adults (26-44 years).
If you are over 65, staying physically active is crucial for keeping fat out of your muscles, which helps maintain strength and function. This link between activity and muscle quality is not as obvious in younger people, but becomes a dominant factor as you age. Focus on consistent daily movement rather than just intense workouts to manage intramuscular fat.
There was a significant linear relationship between physical activity and percent noncontractile area in older (r = -0.68, P = 0.002) but not young subjects.
Why this rating
Cross-sectional observational study with objective MRI measurements and accelerometer data, but lacks causal inference due to design.
Source
Skeletal muscle contractile and noncontractile components in young and older women and men
Jane A. Kent‐Braun et al. · Journal of Applied Physiology · 2000
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