Manchester Metropolitan University

About: Manchester Metropolitan University is a education organization based out in Manchester, Manchester, United Kingdom. It is known for research contribution in the topics: Population & Context (language use). The organization has 5435 authors who have published 16202 publications receiving 442561 citations. The organization is also known as: Manchester Polytechnic & MMU.

Relationships Between Objective and Perceived Housing in Very Old Age

Abstract: Purpose: Our purpose in this study was to explore relationships between aspects of objective and perceived housing in five European samples of very old adults, as well as to investigate whether cross-national comparable patterns exist. Design and Methods: We utilized data from the first wave of the ENABLE-AGE Survey Study. The five national samples totalled 1,918 individuals aged 75 to 89 years. Objective assessments of the home environment covered the number of environmental barriers as well as the magnitude of accessibility problems (an aspect of person-environment fit). To assess perceptions of housing, we used instruments on usability, meaning of home, and housing satisfaction. We also assessed housing-related control. Results: Overall, the results revealed that the magnitude of accessibility problems, rather than the number of physical environmental barriers, was associated with perceptions of activity-oriented aspects of housing. That is, very old people living in more accessible housing perceived their homes as more useful and meaningful in relation to their routines and everyday activities, and they were less dependent on external control in relation to their housing. The patterns of such relationships were similar in the five national samples. Implications: Objective and perceived aspects of housing have to be considered in order to understand the dynamics of aging in place, and the results can be used in practice contexts that target housing for senior citizens.

Changes in joint angle, muscle-tendon complex length, muscle contractile tissue displacement, and modulation of EMG activity during acute whole-body vibration

Abstract: It has been suggested that vibration causes small changes in muscle length, but to the best of our knowledge, these have yet to be demonstrated during whole-body vibration (WBV). This was an observational study to determine whether acute WBV would result in muscle lengthening. We hypothesized that acute WBV would increase electromyography (EMG) activity concurrently with measurable changes in muscle contractile length. Nine healthy males performed two conditions on a Galileo vibration machine for 15 s at 0 HZ (resting) and 6 HZ at a set knee angle of 18 degrees. Muscle tendon complex length, contractile tissue displacement of the medial gastrocnemius muscle, and EMG of soleus, tibialis anterior, and vastus lateralis muscles were measured. At 6 HZ the medial gastrocnemius (MG) muscle tendon complex (MTC) amplitude (375 microm) was significantly greater (P < 0.05) compared to 0 HZ (35 microm). The MG contractile length (CD) amplitude at 6 HZ (176 microm) was significantly greater (P < 0.01) compared to 0 HZ (4 microm). Significant increases (P < 0.05) in EMG modulation were found for all muscles during the 6 HZ compared to the 0 HZ condition. The major finding was that approximately 50% of the elongation occurred within the muscle itself and was associated with preceding changes in EMG. This indicates muscle lengthening may be a prerequisite for eliciting stretch reflexes. In conclusion, there is a temporal association between EMG activity and muscle contractile tissue displacement where low-frequency WBV results in small muscle length changes and increases muscle activation.