Search results for "muscle isometric contraction"

showing 2 items of 2 documents

Plantar flexor activation capacity and H reflex in older adults: adaptations to strength training.

2002

The purpose of this study was to investigate whether the voluntary neural drive and the excitability of the reflex arc could be modulated by training, even in old age. To this aim, the effects of a 16-wk strengthening program on plantar flexor voluntary activation (VA) and on the maximum Hoffman reflex (Hmax)-to-maximum M wave (Mmax) ratio were investigated in 14 elderly men (65–80 yr). After training, isometric maximum voluntary contraction (MVC) increased by 18% ( P < 0.05) and weight-lifting ability by 24% ( P < 0.001). Twitch contraction time decreased by 8% ( P < 0.01), but no changes in half relaxation time and in peak twitch torque were observed. The VA, assessed by twitch …

MaleVolitionAgingPhysiologydegenerationadaptationIsometric exerciseNerve conduction velocityhuman experimentH-ReflexTriceps surae muscleTwitch interpolationadaptation; aged; aging; article; controlled study; degeneration; excitability; exercise; Hoffmann reflex; human; human experiment; male; muscle contraction; muscle isometric contraction; muscle relaxation; muscle twitch; nerve conduction; normal human; plantaris muscle; priority journal; reflex arc; strength; torque; training; voluntary movement; Aging; Exercise; Triceps surae; Twitch interpolationAged 80 and overtrainingvoluntary movementReflex arcarticlereflex arcmusculoskeletal systemAdaptation Physiologicalmuscle twitchmedicine.anatomical_structuremuscle relaxationpriority journalCardiologyTriceps suraemedicine.symptomstrengthMuscle contractionMuscle Contractionmedicine.medical_specialtyWeight Liftingplantaris muscleStrength trainingPhysical exercisePhysical medicine and rehabilitationPhysiology (medical)Internal medicineexcitabilitymedicineHumanscontrolled studyhumannormal humanMuscle SkeletalExercisenerve conductionAgedmuscle isometric contractionbusiness.industrybody regionsHoffmann reflexTorqueH-reflexbusinessJournal of applied physiology (Bethesda, Md. : 1985)
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Cross-sectional area of the paraspinal muscles and its association with muscle strength among fighter pilots: a 5-year follow-up

2019

Background: A small cross sectional area (CSA) of the paraspinal muscles may be related to low back pain among military aviators but previous studies have mainly concentrated on spinal disc degeneration. Therefore, the primary aim of the study was to investigate the changes in muscle CSA and composition of the psoas and paraspinal muscles during a 5-year follow up among Finnish Air Force (FINAF) fighter pilots. Methods: Study population consisted of 26 volunteered FINAF male fighter pilots (age: 20.6 (±0.6) at the baseline). The magnetic resonance imaging (MRI) examinations were collected at baseline and after 5 years of follow-up. CSA and composition of the paraspinal and psoas muscles wer…

Malelcsh:Diseases of the musculoskeletal systemrasitusvammatphysical activitylumbar vertebralihaksetsotilaslentäjätMilitary aviationisometric strengthLongitudinal Studiesnuclear magnetic resonance imagingpathophysiologyFinlandlow back painsotilasilmailuLumbar VertebraeAnatomy Cross-Sectionallumbar spineIncidenceIsometric strengthmagneettikuvauslongitudinal studyMagnetic Resonance ImagingOccupational Diseasesmuscle massG-forceselkäseurantatutkimusResearch ArticleMRIAdultanatomyParaspinal Musclesairplane pilotvolunteerArticleYoung Adultworkmuscle compositionFinn (citizen)follow upHumanscontrolled studyLow back painhumanMuscle Strengthmuscle isometric contractiondisease associationkipuPilotsMuscle compositionparaspinal muscle3121 General medicine internal medicine and other clinical medicineoccupational diseasephysiologylcsh:RC925-935psoas muscleanatomy and histologyFollow-Up StudieslihasvoimaBMC Musculoskeletal Disorders
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