Shoulder strength flexibility and proprioception are of great importance for athletes who do overhead activities throwing sports. In volleyball, basketball, handball, the shoulder muscles work under heavy conditions technical load game. this study, it was aimed to compare force senses (FS) team athletes. A total 36 healthy individuals, including 14 12 10 handball players, with a mean age 19.0 ±...

The low-back pain has demonstrated to be a common finding among athletes and particularly the overload in the lumbar column resulting from a strength or isometric resistance involvement of muscles of this segment as result of the muscular fatigue has been considered as important etiological factor for its development. In this context, tests used for the training evaluation of the lumbar spinae ...

BACKGROUND AND PURPOSE A new method of dynamometry has been developed to measure the performance of the craniocervical (CC) flexor muscles by recording the torque that these muscles exert on the cranium around the CC junction. This report describes the method, the specifications of the instrument, and the preliminary reliability data. SUBJECTS AND METHODS For the reliability study, 20 subject...

Normalization of electromyographic (EMG) amplitudes is necessary in the study of human motion. However, there is a lack of agreement on the most reliable and appropriate normalization method. This study evaluated the reliability of single leg stance (SLS) and maximal voluntary isometric contraction (MVIC) normalization methods and the relationship between these measures for the gluteus maximus ...

The influences of aging in muscle recruitment are still unclear. We used an isometric contraction protocol and an EMG–driven muscle model to estimate the contribution of each component of triceps surae muscle to ankle torque, in both young adults and elderly. Six subjects were enrolled in the study, 3 young and 3 elderly. The experimental protocol consists in two sustained contractions of 20% a...

The value of electromyography (EMG) in the interpretation of normal and pathological movement depends on recording, processing, and normalization procedures. Traditionally, maximum voluntary isometric contraction (MVIC) of individual muscles is commonly used for EMG normalization. However, this is a time- and energy-consuming procedure, especially in patients. The aim of the present study was t...

This study examines if electromyographic (EMG) amplitude differences exist between patients with shoulder instability and healthy controls performing scaption, prone horizontal abduction, prone external rotation, and push-up plus shoulder rehabilitation exercises. Thirty nine subjects were categorized by a single orthopedic surgeon as having multidirectional instability (n = 10), anterior insta...

The purpose of this study was to determine the reliability of three normalization methods for analyzing hip abductor activation during rehabilitation exercises. Thirteen healthy subjects performed three open kinetic chain and three closed kinetic chain hip abductor exercises. Surface EMG activity for the gluteus medius was collected during each exercise and normalized based on a maximum volunta...

Williams, MJ, Gibson, N, Sorbie, GG, Ugbolue, UC, Brouner, J, and Easton, C. Activation of the gluteus maximus during performance back squat, split barbell hip thrust relationship with maximal sprinting. J Strength Cond Res 35(1): 16–24, 2021—The purpose this research was to compare muscle activation ground reaction force between thrust, squat determine these outcomes vertical horizontal forces...

The aims of this study were to compare the activation of global and local muscles of the trunk during bridging with sling exercise (BSE), bridging with ball exercise (BBE), and normal bridging exercise (NBE) and to conduct and analyze these exercises in supine and prone positions to prove the effectiveness of sling exercises. Thirty patients with current low back pain (LBP) were recruited. In t...