Background: Bone fatigue resistance and more generally the ability to dissipate the stress sustained in dynamic tasks are partly affected by tissue properties. Men and women demonstrate substantial differences in body composition.
Research Question: To assess whether gender, as a function of body composition, affects impact-related parameters in running.
J Orthop Sports Phys Ther
February 2016
Study Design: Controlled laboratory study.
Background: Orthotic heel lifts are thought to lower tension in the Achilles tendon, but evidence for this effect is equivocal.
Objective: To investigate the effect of a 12-mm, in-shoe orthotic heel lift on Achilles tendon loading during shod walking using transmission-mode ultrasonography.
Background: Footwear remains a prime candidate for the prevention and rehabilitation of Achilles tendinopathy because it is thought to decrease tension in the tendon through elevation of the heel. However, evidence for this effect is equivocal.
Purpose: This study used an acoustic transmission technique to investigate the effect of running shoes on Achilles tendon loading during barefoot and shod walking.
This case study reports the kinematic effect of 2 different cricket shoes on a fast bowler who reports a history of posterior ankle joint impingement. The participant bowled 6 trials in 2 pairs of cricket shoes. The 3-dimensional kinematics of the joints of the front leg was quantified during stance phase of the delivery stride.
View Article and Find Full Text PDFBackground: The evaluation of foot posture in a clinical setting is useful to screen for potential injury, however disagreement remains as to which method has the greatest clinical utility. An inexpensive and widely available imaging system, the Microsoft Kinectâ„¢, may possess the characteristics to objectively evaluate static foot posture in a clinical setting with high accuracy. The aim of this study was to assess the intra-rater reliability and validity of this system for assessing static foot posture.
View Article and Find Full Text PDFExcessive foot pronation has been associated with injuries of the lower extremity. No research has investigated the effect of enhancing plantar sensory feedback on foot pronation. The aim of this study was to determine whether a shoe with enhanced plantar sensory feedback reduces midfoot pronation.
View Article and Find Full Text PDFEur J Appl Physiol
February 2011
Estrogen receptors in skeletal muscle suggest a tissue-based mechanism for influencing neuromuscular control. This has important physiological implications for both eumenorrheic women with fluctuating estrogen levels and those with constant and attenuated estrogen levels, i.e.
View Article and Find Full Text PDFClin Biomech (Bristol)
July 2010
Background: The relationship between the phases of the menstrual cycle and injury risk remains unclear. Neuromuscular function may be compromised during menstruation, which could result in reduced cyclicality of movement patterns. We hypothesize that mediolateral (varus/valgus) knee acceleration during running gait will possess increased variability during menstruation when compared to approximately ovulation in women who do not take the monophasic oral contraceptive pill (MOCP).
View Article and Find Full Text PDFBackground: A method of measuring tri-axial plantar fascia strain that is minimally affected by external compressive force has not previously been reported.
Objective: The purpose of this study was to assess the use of micro-strain gauges to examine strain in the different axes of the plantar fascia.
Method: Two intact limbs from a thawed, fresh-frozen cadaver were dissected, and a combination of five linear and one three-way rosette gauges were attached to the fascia of the foot and ankle.
J Appl Physiol (1985)
October 2008
The purpose of this study was to elucidate the effect of normal fluctuating [non-monophasic oral contraceptive pill (MOCP) users] and low, consistent (MOCP users) endogenous plasma estrogen levels on the strain behavior of the Achilles tendon in vivo. Twenty women (age 28.0 +/- 4.
View Article and Find Full Text PDFNew research has changed our perception and management of common injuries. Magnetic resonance imaging and arthroscopy of the hip have shown that labral injuries, chondral injuries, rim lesions, synovitis and tears of the ligament teres are common causes of hip, groin and low-back pain. Hip arthroscopy is used both as a diagnostic and therapeutic tool; it has been shown to be of benefit in recent traumatic labral injury, but disappointing in the management of chronic hip pain (which may be associated with degenerative change, and chondral lesions of the acetabulum).
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