High proportion of type I fibres in the gluteus medius muscle of young Norwegian–Swedish coldblooded trotters

Five Standardbred trotters were trained on a treadmill 3 times/wk for 12 wk by intervals of draft-loaded exercise. The draft load was 34 kp and the velocity approximately 7 m/s. Muscle biopsies were taken from the gluteus medius and longissimus muscles before training and after 2, 4, 8, and 12 wk of training and from the brachiocephalicus muscle before and after training. Both the percentage and the area of type IIa fibers increased and the percentage of type IIb fibers decreased in the gluteus medius muscle during the first 2 wk of training, and then no further significant difference was noted. The percentage of type I fibers increased in the brachiocephalicus muscle, and the area of type IIb fibers increased in the longissimus muscle. The citrate synthase activity increased in the gluteus muscle only, and the increase was seen during the first 2 wk. No significant differences were seen in 3-hydroxy-acyl-CoA dehydrogenase and lactate dehydrogenase activities in the muscles during the entire training period. Less glycogen was utilized in the gluteus muscle and less blood lactate accumulated when the horses performed an unloaded submaximal exercise test after compared with before training. It can be concluded that rapid changes are induced in the gluteus medius muscle when horses are trained pulling a light-draft resistance at a submaximal trotting speed.

Download Full-text

Light exercise causes adaptive changes in muscles of young Brasileiro de Hipismo horses

Ciência Rural ◽

10.1590/s0103-84782008000500017 ◽

2008 ◽

Vol 38 (5) ◽

pp. 1313-1318 ◽

Cited By ~ 3

Author(s):

Flora Helena de Freitas D'Angelis ◽

Marco Augusto Giannoccaro da Silva ◽

Carla Braga Martins ◽

Guilherme de Camargo Ferraz ◽

João Ademir de Oliveira ◽

...

Keyword(s):

Physical Activity ◽

Gluteus Medius ◽

Cross Sectional Area ◽

Type I ◽

Fiber Types ◽

Sectional Area ◽

Light Physical Activity ◽

Cross Sectional ◽

Gluteus Medius Muscle ◽

Intensity Physical Activity

This study aimed to determine the changes in the Gluteus medius of 4 year-old Brasileiro de Hipismo (BH) horses submitted to light physical activity for 10 months. The study involved 11 horses from the "Nove de Julho" Battalion of the Military Police of São Paulo State (PM-SP). Percutaneous muscle biopsy was performed in horses at maintenance and in those that had participated in routine police work for 10 months with the PM-SP. Fragments of the left Gluteus medius muscle was removed at depths of 20mm and 60mm. To determine the fiber types, the histochemical analyses were performed for myofibrillar adenosine triphosphatase (mATPase) and nicotinamide adenine dinucleotide tetrazolium reductase (NADH-TR). The morphometry of the fibers was performed by calculating the cross sectional area (CSA), relative frequency distribution (F) and relative cross-sectional area (RCSA). After the period of physical activity, type IIA fibers showed an increase in F and RCSA at both depths. The type I fibers showed a decrease in F at a depth of 60mm and the type IIX fibers showed no change in F at the two depths. With regard to the results for RCSA, type I and IIX fibers also did not show alterations after 10 months of light physical activity. Low intensity physical activity produced significant adaptations in the Gluteus medius muscle of horses of the BH breed, including changes in metabolic and contractile properties as evidenced by the increase in the area occupied by type IIA fibers at both depths of the biopsy.

Download Full-text

NaCl content and temperature effects on moisture diffusivity in the Gluteus medius muscle of pork ham

Meat Science ◽

10.1016/s0309-1740(02)00048-7 ◽

2003 ◽

Vol 63 (1) ◽

pp. 29-34 ◽

Cited By ~ 60

Author(s):

P Gou ◽

J Comaposada ◽

J Arnau

Keyword(s):

Temperature Effects ◽

Gluteus Medius ◽

Moisture Diffusivity ◽

Gluteus Medius Muscle

Download Full-text

Gluteus Medius Muscle Activities According to Various Angle of Mediolateral Ramp During Cross Walking and One-leg Standing

Journal of the Korean Society of Physical Medicine ◽

10.13066/kspm.2017.12.2.53 ◽

2017 ◽

Vol 12 (2) ◽

pp. 53-57 ◽

Cited By ~ 5

Author(s):

Seon-Chil Kim ◽

Sang-Yeol Lee

Keyword(s):

Gluteus Medius ◽

Gluteus Medius Muscle

Download Full-text

β-Hydroxy β-methylbutyrate supplementation to adult Thoroughbred geldings increases type IIA fiber content in the gluteus medius

Journal of Animal Science ◽

10.1093/jas/skab264 ◽

2021 ◽

Vol 99 (10) ◽

Author(s):

Nicolas I Busse ◽

Madison L Gonzalez ◽

Mackenzie L Krason ◽

Sally E Johnson

Keyword(s):

Gluteus Medius ◽

Biceps Femoris ◽

Biomechanical Properties ◽

Metacarpophalangeal Joint ◽

Type I ◽

Median Frequency ◽

Hind Limbs ◽

Integrated Emg ◽

Improved Performance ◽

Surface Electromyograms

Abstract Consumption of β-hydroxy β-methylbutyrate (HMB) alters muscle composition and metabolism leading to strength and agility improvements in human athletes. To determine if HMB affects athletic performance and muscle function in horses, Thoroughbred geldings were fed a control (CON; n = 5) or HMB (n = 6) supplement for 6 wk prior to completing a standardized exercise test (SET). Gluteus medius (GM) muscle biopsies were obtained before the SET for fiber typing. Heart rate, biceps femoris (BF) and semitendinosus (ST) surface electromyograms (EMG), and fore and hind limbs metacarpophalangeal joint angles were captured at the gallop of the SET. Results demonstrate that HMB supplementation increased (P < 0.05) the percentage of type IIA and IIA/X muscle fibers in the GM with a corresponding decrease (P < 0.05) in type IIX fibers. The percentage of type I fibers was unaffected by diet. Supplementation with HMB did not result in any measurable effects on performance or biomechanical properties by comparison to CON. Supplementation with HMB resulted in an increase (P < 0.05) in ST median frequency at speeds of 10 m/s and greater. Increasing treadmill speed resulted in an increase (P < 0.05) in stride length and the maximal proximal forelimb fetlock angle, and a decrease (P < 0.05) in stance phase time of the gait cycle. Integrated EMG (iEMG) increased (P < 0.05) with increasing treadmill speeds for both the BF and ST with the BF exhibiting greater (P < 0.05) iEMG values than the ST. In summary, HMB increased the percentage of type IIA GM fibers, which did not translate into improved performance.

Download Full-text

EVALUATION OF THE GLUTEUS MEDIUS MUSCLE AFTER A PELVIC SUPPORT OSTEOTOMY TO TREAT CONGENITAL DISLOCATION OF THE HIP

The Journal of Bone and Joint Surgery (American) ◽

10.2106/00004623-200510000-00014 ◽

2005 ◽

Vol 87 (10) ◽

pp. 2246-2252

Author(s):

MUHARREM INAN ◽

ALPAY ALKAN ◽

AHMET HARMA ◽

KADIR ERTEM

Keyword(s):

Gluteus Medius ◽

Congenital Dislocation ◽

Gluteus Medius Muscle ◽

Pelvic Support ◽

Pelvic Support Osteotomy ◽

Dislocation Of The Hip

Download Full-text

Risk of Superior Gluteal Nerve and Gluteus Medius Muscle Injury During Femoral Nail Insertion

The Journal of Bone and Joint Surgery (American) ◽

10.2106/00004623-200704000-00019 ◽

2007 ◽

Vol 89 (4) ◽

pp. 829-834 ◽

Cited By ~ 9

Author(s):

Mehmet Hakan Ozsoy ◽

Kerem Basarir ◽

Alp Bayramoglu ◽

Bulent Erdemli ◽

Eray Tuccar ◽

...

Keyword(s):

Muscle Injury ◽

Gluteus Medius ◽

Gluteus Medius Muscle ◽

Superior Gluteal Nerve ◽

Femoral Nail ◽

Nail Insertion

Download Full-text

Design and Feasibility Study of a Leg-exoskeleton Assistive Wheelchair Robot with Tests on Gluteus Medius Muscles

Sensors ◽

10.3390/s19030548 ◽

2019 ◽

Vol 19 (3) ◽

pp. 548 ◽

Cited By ~ 3

Author(s):

Gao Huang ◽

Marco Ceccarelli ◽

Qiang Huang ◽

Weimin Zhang ◽

Zhangguo Yu ◽

...

Keyword(s):

Lower Limb ◽

Gluteus Medius ◽

Lower Limbs ◽

Gluteus Medius Muscle ◽

Emg Signal ◽

Assistive Robot ◽

Robotic Motion ◽

Leg Motion ◽

Motion Characteristics ◽

Exercise Efficiency

The muscles of the lower limbs directly influence leg motion, therefore, lower limb muscle exercise is important for persons living with lower limb disabilities. This paper presents a medical assistive robot with leg exoskeletons for locomotion and leg muscle exercises. It also presents a novel pedal-cycling actuation method with a crank-rocker mechanism. The mechanism is driven by a single motor with a mechanical structure that ensures user safety. A control system is designed based on a master-slave control with sensor fusion method. Here, the intended motion of the user is detected by pedal-based force sensors and is then used in combination with joystick movements as control signals for leg-exoskeleton and wheelchair motions. Experimental data is presented and then analyzed to determine robotic motion characteristics as well as the assistance efficiency with attached electromyogram (EMG) sensors. A typical muscle EMG signal analysis shows that the exercise efficiency for EMG activated amplitudes of the gluteus medius muscles approximates a walking at speed of 3 m/s when cycling at different speeds (i.e., from 16 to 80 r/min) in a wheelchair. As such, the present wheelchair robot is a good candidate for enabling effective gluteus medius muscle exercises for persons living with gluteus medius muscle disabilities.

Download Full-text

Gluteus medius muscle function in people with and without low back pain: a systematic review

BMC Musculoskeletal Disorders ◽

10.1186/s12891-019-2833-4 ◽

2019 ◽

Vol 20 (1) ◽

Cited By ~ 4

Author(s):

Sean Sadler ◽

Samuel Cassidy ◽

Benjamin Peterson ◽

Martin Spink ◽

Vivienne Chuter

Keyword(s):

Systematic Review ◽

Low Back Pain ◽

Back Pain ◽

Muscle Function ◽

Weight Bearing ◽

Gluteus Medius ◽

Measurement Tool ◽

Low Back ◽

Case Control Studies ◽

Gluteus Medius Muscle

Abstract Introduction Globally, low back pain (LBP) is one of the greatest causes of disability. In people with LBP, dysfunction of muscles such as the gluteus medius have been demonstrated to increase spinal loading and reduce spinal stability. Differences in gluteus medius function have been reported in those with LBP compared to those without, although this has only been reported in individual studies. The aim of this systematic review was to determine if adults with a history, or current LBP, demonstrate differences in measures of gluteus medius function when compared to adults without LBP. Methods MEDLINE, EMBASE, AMED, PsycINFO, PubMED, Pro Quest Database, CINAHL and SPORTDiscus were searched from inception until December 2018 for published journal articles and conference abstracts. No language restrictions were applied. Only case-control studies with participants 18 years and over were included. Participants could have had any type and duration of LBP. Studies could have assessed gluteus medius function with any quantifiable clinical assessment or measurement tool, with the participant non-weight bearing or weight bearing, and during static or dynamic activity. Quality appraisal and data extraction were independently performed by two authors. Results The 24 included articles involved 1088 participants with LBP and 998 without LBP. The gluteus medius muscle in participants with LBP tended to demonstrate reduced strength and more trigger points compared to the gluteus medius muscle of those without LBP. The level of activity, fatigability, time to activate, time to peak activation, cross sectional area, and muscle thickness showed unclear results. Meta-analysis was not performed due to the heterogeneity of included studies. Conclusion Clinically, the findings from this systematic review should be considered when assessing and managing patients with LBP. Future studies that clearly define the type and duration of LBP, and prospectively assess gluteus medius muscle function in those with and without LBP are needed. Trial registration PROSPERO (CRD42017076773).

Download Full-text