OBJECTIVE To evaluate the patellar height of volunteers with and without patellofemoral pain syndrome (PPS) during maximal voluntary isometric contraction (MVIC) in open kinetic chain (OKC) and closed kinetic chain (CKC) exercises. METHODS Twenty healthy women, and nineteen women with patellofemoral pain syndrome were evaluated and subjected to nuclear magnetic resonance imaging during rest a...

Objectives The aim of this investigation was to determine if acute or repeated applications ischemic preconditioning (IPC) could enhance the recovery process, following exercise induced muscle damage (EIMD). Design Randomized control trial. Methods Twenty-three healthy males were familiarised with damaging protocol (five sets 20 drop jumps from a 0.6 m box) and randomly allocated one three grou...

To investigate if the type of encouragement during a maximal voluntary isometric contraction (MVIC) had an influence on peak muscle force in strength-trained versus untrained collegiate women. Eleven strength-trained (20±1 y) and twelve untrained (21±1 y) women participated in three, five-second MVICs of seated knee extension. The three trials consisted of verbal only encouragement, verbal + vi...

BACKGROUND Few interventions reduce patellar tendinopathy (PT) pain in the short term. Eccentric exercises are painful and have limited effectiveness during the competitive season. Isometric and isotonic muscle contractions may have an immediate effect on PT pain. METHODS This single-blinded, randomised cross-over study compared immediate and 45 min effects following a bout of isometric and i...

Post-activation performance enhancement (PAPE) is an improvement to voluntary muscle following a conditioning activity. There evidence of fatigue resistance deficits in non-exercised muscles unilateral fatiguing exercise contralateral muscle. The purpose this study was determine if protocol could induce PAPE contralateral, young healthy adults. Thirty-two recreationally trained (n = 16) and ath...

BACKGROUND During a continuous femoral nerve block, the influence of catheter tip position relative to the femoral nerve on infusion characteristics remains unknown. METHODS We inserted bilateral femoral perineural catheters in volunteers (ultrasound-guided, needle in-plane). Subjects' dominant side was randomized to have the catheter tip placed either anterior or posterior to the femoral ner...

BACKGROUND Hamstring injuries are common in many sports, including track and field. Strains occur in different parts of the hamstring muscle but very little is known about whether common hamstring loading exercises specifically load different hamstring components. The purpose of this study was to investigate muscle activation of different components of the hamstring muscle during common hamstri...

This study determined whether age-related mechanisms can increase fatigue of arm muscles during maximal velocity dynamic contractions, as it occurs in the lower limb. We compared elbow flexor fatigue of young (n=10, 20.8±2.7 years) and old men (n=16, 73.8±6.1 years) during and in recovery from a dynamic and an isometric postural fatiguing task. Each task was maintained until failure while suppo...

PURPOSE The effects of exercise training on neuromuscular function of arm and leg muscles in type 2 diabetic patients (T2D) was investigated. METHODS Eight T2D sedentary male patients (61.0±2.3years) and eight sedentary healthy age matched control subjects (H, 63.9±3.8years) underwent a 16-week supervised combined endurance and resistance exercise program. Before and after training, maximal i...

CONTEXT Contralateral muscular imbalances have been suggested to increase the risk of lower extremity injury. Previous groups have assessed strength of the quadriceps and hamstring muscle groups; however, no previous authors have compared bilateral hip-abductor muscular performance. OBJECTIVE To examine the strength and fatigability of the hip abductors in the dominant and nondominant legs. ...