Редактирование: RP2 (раздел)

==Publications==

{{medline-entry
|title=Stumbling over obstacles in older adults compared to young adults.
|pubmed-url=https://pubmed.ncbi.nlm.nih.gov/15615837
|abstract=Falls are a major problem in older adults. Many falls occur because of stumbling. The aim of the present study is to investigate stumbling reactions of older adults and to compare them with young adults. While subjects walked on a treadmill, a rigid obstacle unexpectedly obstructed the forward sway of the foot. In general, older adults used the same movement strategies as young adults ("elevating" and "lowering"). The electromyographic responses were categorized according to latencies: short-latency (about 45 ms, [[RP1]]), medium-latency (about 80 ms, [[RP2]]), and long-latency responses (about 110 ms, RP3; about 160 ms, RP4). Latencies of [[RP1]] responses increased by about 6 ms and of [[RP2]] by 10-19 ms in older adults compared with the young. Amplitudes of [[RP1]] were similar for both age groups, whereas amplitudes of [[RP2]]-RP4 could differ. In the early-swing elevating strategy (perturbed foot directly lifted over the obstacle) older adults showed smaller responses in ipsilateral upper-leg muscles (biceps femoris and rectus femoris). This was related to shorter swing durations, more shortened step distances, and more failures in clearing the obstacle. In parallel, RP4 activity in the contralateral biceps femoris was enhanced, possibly pointing to a higher demand for trunk stabilization. In the late-swing lowering strategy (foot placed on the treadmill before clearing the obstacle) older adults showed lower [[RP2]]-RP3 responses in most muscles measured. However, kinematic responses were similar to those of the young. It is concluded that the changes in muscular responses in older adults induce a greater risk of falling after tripping, especially in early swing.
|mesh-terms=* Adult
* Aged
* Aging
* Biomechanical Phenomena
* Electromyography
* Exercise Test
* Female
* Gait
* Gait Disorders, Neurologic
* Humans
* Male
* Middle Aged
* Postural Balance
* Reaction Time
* Reference Values
* Time Factors

|full-text-url=https://sci-hub.do/10.1152/jn.00396.2004
}}
{{medline-entry
|title=Influence of age at nutritional restriction on growth and sexual development of gilts.
|pubmed-url=https://pubmed.ncbi.nlm.nih.gov/1777056
|abstract=Large White females were fed on a plane of nutrition close to ad libitum during the entire experimental period ([[CTRL]] group, n = 48) or restricted during a limited period of their growth ([[RP1]] group: 28-62 kg, [[RP2]] group: 64-96 kg, RP3 group: 97-131 kg, n = 48/group). Blood samples were taken before 200 and 230 days of age in order to detect cyclic gilts by assaying their progesterone levels. Animals were slaughtered at approximately 260 d of age and their genital tracts were examined. Overall feed intake, feed conversion ratio and daily gain were significantly lower in restricted than in [[CTRL]] gilts (average daily gain: 678, 680, 668 and 741 g/day respectively in [[RP1]], [[RP2]], RP3 and [[CTRL]] groups, P less than 0.05). At slaughter, animals from the 3 restricted groups has similar live weights but were lighter (152 vs 164 kg live weight, P less than 0.05) and leaner than [[CTRL]] (fat thickness: 29.5, 30.5, 28.0 and 34.1 mm respectively, in [[RP1]], [[RP2]], RP3 and [[CTRL]] groups). Respectively, 9, 43 and 76% of the gilts were puberal at 200, 230 and 260 days of age. The percentage of cyclic females was not influenced by treatment at 200 and 260 days of age while it was higher in [[CTRL]] (50%) and [[RP1]] (56%) groups than in [[RP2]] (35%) and RP3 (29%) groups at 230 days of age (P less than 0.05). At 260 days of age, ovarian and genital tract weights were not influenced by treatment either in prepuberal or in cyclic gilts.(ABSTRACT TRUNCATED AT 250 WORDS)
|mesh-terms=* Aging
* Animals
* Female
* Food Deprivation
* Sexual Maturation
* Swine
* Weight Gain

|full-text-url=https://sci-hub.do/10.1051/rnd:19910604
}}