Influence of exercise intensity on training-induced tendon mechanical properties changes in older individuals

This study compared the effects of low vs. high intensity training on tendon properties in an elderly population. Participants were pair-matched (gender, habitual physical activity, anthropometrics, and baseline knee extension strength) and then randomly assigned to low (LowR, i.e., ∼40 % 1RM) or high (High R, i.e., ∼80 % 1RM) intensity resistance training programmes for 12 weeks, 3x per week (LowR, n = 9, age 74 ± 5 years; HighR, n = 8, age 68 ± 6 years). Patellar tendon properties (stiffness [K], Young's modulus [YM], cross-sectional area [T CSA], and tendon length [T L]) were measured pre and post training using a combination of magnetic resonance imaging (MRI), B-mode ultrasonography, dynamometry, electromyography and ramped isometric knee extensions. With training K showed no significant change in the LowR group while it incremented by 57.7 % in the HighR group (p < 0.05). The 51.1 % group difference was significant (p < 0.05). These differences were still apparent when the data was normalized for T CSA and T L, i.e., significant increase in YM post-intervention in HighR (p < 0.05), but no change in LowR. These findings suggest that when prescribing exercise for a mixed genders elderly population, exercise intensities of ≤40 % 1RM may not be sufficient to affect tendon properties. © 2014 American Aging Association

Physical activity in older age: perspectives for healthy ageing and frailty.

Regular physical activity helps to improve physical and mental functions as well as reverse some effects of chronic disease to keep older people mobile and independent. Despite the highly publicised benefits of physical activity, the overwhelming majority of older people in the United Kingdom do not meet the minimum physical activity levels needed to maintain health. The sedentary lifestyles that predominate in older age results in premature onset of ill health, disease and frailty. Local authorities have a responsibility to promote physical activity amongst older people, but knowing how to stimulate regular activity at the population-level is challenging. The physiological rationale for physical activity, risks of adverse events, societal and psychological factors are discussed with a view to inform public health initiatives for the relatively healthy older person as well as those with physical frailty. The evidence shows that regular physical activity is safe for healthy and for frail older people and the risks of developing major cardiovascular and metabolic diseases, obesity, falls, cognitive impairments, osteoporosis and muscular weakness are decreased by regularly completing activities ranging from low intensity walking through to more vigorous sports and resistance exercises. Yet, participation in physical activities remains low amongst older adults, particularly those living in less affluent areas. Older people may be encouraged to increase their activities if influenced by clinicians, family or friends, keeping costs low and enjoyment high, facilitating group-based activities and raising self-efficacy for exercise

Self-reported physical fitness in frail older persons: Reliability and validity of the self-assessment of physical fitness (Sapf)

In very old and/ or frail older people living in long-term care facilities, physical inactivity negatively affects activities of daily living. The main reason to assess older adults' perceived fitness is to establish the relation with their beliefs about their ability to perform physical activity adjusted to daily tasks. The Self-Assessment of Physical Fitness scale was developed to address these needs. The aim of this study was to estimate the test-retest reliability and construct validity of the scale. 76 elderly people (M age =86.0 yr., SD = 6.3) completed the test. Cronbach's alpha was.71. One-week test-retest reliability ICC's ranged from.66 (SAPF aerobic endurance and SAPF balance) to .70 (SAPF sum score). Concurrent validity with the Groningen Fitness Test for the Elderly was fair to moderate. Despite the limited number of participants (N =76), results suggest that the scale may be useful as an assessment of perceived fitness in older adults

Frailty in older inpatients: what physicians need to know

Physicians involved in the care of medical inpatients, irrespective of their sub-specialty area, will be responsible for the management of a significant number of older adults with complex care needs and multiple co-morbidities. These patients are vulnerable to poor outcomes (including falls, institutionalization and death)-a vulnerability often linked with the term 'frail' or 'frailty'. Frailty is associated with advanced chronological age and chronic disease but is a separate construct. The measurement of frailty has received significant attention in recent geriatric medicine literature, with various models proposed to predict the risk of poor outcomes. Here, we briefly review different approaches to the definition of frailty, focusing on the conceptualization of frailty as the failure of a complex system. We explore how falls, a common cause of morbidity and mortality in older patient groups, may be a manifestation of increasing frailty and argue that falls services should avoid the practice of pursuing a single-organ cause when there are likely to be several contributing factors at play. We also consider the impact of frailty on medication prescribing and discuss how individualized prescribing could reduce the risk of adverse drug reactions in at-risk older inpatients. While it can be frustrating for physicians to manage patients who do not fit well into disease-based diagnostic and management algorithms, understanding frailty has the potential to improve the clinical care of vulnerable older people in the hospital setting