We report that human tendons including the Achilles tendons exhibits the very unusual mechanical property of a negative Poisson's ratio (auxetic) meaning that they get fatter rather than thinner when stretched. This report is backed by in vivo and ex vivo experiments we performed which clearly confirm auxeticity in this living material for strains which correspond to those experienced during most normal everyday activities. We also show that this property is not limited to the human Achilles tendon, as it was also found in tendons taken from sheep and pigs. This new information about tendons can form the scientific basis for a test for tendon health as well as enable the design of better tendon prosthesis which could replace damaged tendons.
Background: Pulmonary Rehabilitation (PR) is known to lead to improvements in exercise tolerance, health related quality of life and help reduce symptoms. Exercise, although of great benefit, can increase the inflammatory response related to Chronic Obstructive Pulmonary Disease, depending on intensity and duration. Through this study, the effects of a 12 week, high intensity PR programme on COPD inflammatory related markers were investigated. and exhaled NO at baseline and upon completion of the programme.Results: This 12 week PR programme resulted in significant improvements in both the 6MW distance and health quality of life, but resulted in no changes in the inflammatory markers.
Conclusion:Beneficial effects on functional and HR-QoL measures resulted, which however appear unrelated to changes in the systemic inflammatory markers.
This work presents a qualitative and quantitative pilot study which explores the kinematics of Venetian style forward-facing standing rowing as practised by able-bodied competitive athletes. The technique, made famous by the gondoliers, was replicated in a biomechanics laboratory by a cohort of four experienced rowers who compete in this style at National Level events in Malta. Athletes were marked with reflective markers following the modified Helen Hayes model and asked to row in a manner which mimics their on-water practise and recorded using a Vicon optoelectronic motion capture system. Data collected were compared to its equivalent using a standard sliding-seat ergometer as well as data collated from observations of athletes rowing on water, thus permitting the documentation of the manner of how this technique is performed. It was shown that this rowing style is characterised by rather asymmetric and complex kinematics, particularly upper-body movements which provides the athlete with a total-body workout involving all major muscle groups working either isometrically, to provide stability, or actively.
Osteoarthritis is a condition commonly present in the elderly, with many having altered balance, aggravated with weak lower limb and core musculature predisposing them to falls. Despite the knowledge about the link between balance and core stability, studies investigating the importance of core stability exercise and their impact on balance are limited. Therefore, the authors aimed to explore whether core strengthening exercises in combination with hip exercises, when compared to a hip exercise programme and a control group, led to better improvements in balance in patients with hip osteoarthritis. In order to meet these aims, this paper reports the outcomes of a randomized, three-arm parallel, assessor-blinded, controlled clinical trial. Fifty-one participants awaiting a total hip replacement were recruited into this study. All patients were randomly allocated to a control, hip exercise group and hip and core exercise group. All participants were assessed for core muscle strength using a pressure biofeedback unit and balance using the four-stage balance test. The control group had no intervention. A 12-week hip and core exercise programme did not result in improvements over and above the hip exercise group in balance scores. However an improvement in core stability was noted for the hip and core exercise group (P = 0.001). Therefore, this study concluded that both exercise groups are resulted in improved balance with the core and hip exercise group noted to have added improvements, but the difference between the groups was not statistically significant.
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