Search results for "fibre type"
showing 4 items of 4 documents
Absence of an aging-related increase in fiber type grouping in athletes and non-athletes
2020
The ageing-related loss of muscle mass is thought to be partly attributable to motor neuron loss and motor unit remodelling that result in fibre type grouping. We examined fibre type grouping in 19- to 85-year-old athletes and non-athletes and evaluated to which extent any observed grouping is explained by the fibre type composition of the muscle. Since regular physical activity may stimulate reinnervation, we hypothesised that fibre groups are larger in master athletes than in age-matched non-athletes. Fibre type grouping was assessed in m. vastus lateralis biopsies from 22 young (19-27 years) and 35 healthy older (66-82 years) non-athletes, and 14 young (20-29 years), 51 middle-aged (38%6…
Presymplectic manifolds and conservation laws
2008
In this paper we make use of a new structure called seeded fibre bundle. This allows us to combine the symplectic formalism and general relativity. A theorem of existence is obtained and some examples and properties are studied.
Absence of an aging‐related increase in fibre type grouping in athletes and non‐athletes
2020
The ageing‐related loss of muscle mass is thought to be partly attributable to motor neuron loss and motor unit remodelling that result in fibre type grouping. We examined fibre type grouping in 19‐ to 85‐year‐old athletes and non‐athletes and evaluated to which extent any observed grouping is explained by the fibre type composition of the muscle. Since regular physical activity may stimulate reinnervation, we hypothesised that fibre groups are larger in master athletes than in age‐matched non‐athletes. Fibre type grouping was assessed in m. vastus lateralis biopsies from 22 young (19‐27 years) and 35 healthy older (66‐82 years) non‐athletes, and 14 young (20‐29 years), 51 middle‐aged (38‐6…