This study is the first in which measurements of thickness, fascicle angle and length, tendon elongation were combined to examine impact eccentric strength training on both muscle architecture tendinous structures. Eighteen healthy male subjects divided into an group (n = 10) a control 8). The program consisted 18 sessions exercises over 7-week period. All tested at baseline after last session. Using ultrasound imaging, length thickness medial gastrocnemius (MG) analyzed rest (i.e.,...

This study was designed to investigate the modulations of H-reflex and V-wave responses during passive maximal active dynamic actions. Experiments were performed on 16 healthy males [age: 24 +/- 4 (SD) yr]. Maximal H-reflexes (Hmax) M-waves (MmaxR) evoked at same muscle length isometric, shortening lengthening actions voluntary concentric, eccentric plantar-flexion. In all contraction types, supra-maximal stimulus intensity used evoke superimposed M wave (MmaxA) V (V) soleus muscle. At rest,...

The aim of the study was to use combined longitudinal measurements soleus (SOL) and gastrocnemii evoked V-wave H-reflex responses determine site adaptations within central nervous system induced by 5 wk neuromuscular electrical stimulation (NMES) training plantar flexor muscles. Nineteen healthy males subjects were divided into a electrostimulated group (n = 12) control 7). program consisted 15 sessions isometric NMES over 5-wk period. All tested before after SOL, lateral gastrocnemius (LG),...

Purpose: The aim of the study was to use eccentric strength training plantar flexor muscles investigate plasticity spinal reflexes during maximal voluntary isometric, concentric, and contractions. Methods: Eighteen healthy male subjects were divided into an group (N = 10) a control 8). program consisted 18 sessions exercise for 7-wk period. All tested before, during, after program. Soleus (SOL) medial gastrocnemius (MG) (H-reflex V-wave) M-waves evoked at same angular position passive...

This study was designed to investigate the cortical and spinal mechanisms involved in modulations of neural activation during lengthening compared with isometric shortening maximal voluntary contractions (MVCs). Two muscles susceptible different adjustments at level, soleus (SOL) medial gastrocnemius (MG), were compared. Twelve healthy males participated least two experimental sessions assess corticospinal excitabilities. We modulation motor evoked potentials (MEPs) response transcranial...

This study investigated the influence of torque produced by plantar flexor muscles on cortical and spinal excitability during lengthening shortening voluntary contractions. To that purpose, modulations motor-evoked potential (MEP) Hoffmann (H) reflex were compared in soleus (SOL) medial gastrocnemius (MG) anisometric submaximal maximal contraction (MVC) muscles. For contractions, target was set at 50% their respective MVC force. The results indicate amplitudes both MEP H-reflex responses,...

Objective: To examine the effect of eccentric endurance training on exercise capacities in patients with coronary artery disease. Design: Randomized parallel group controlled study. Setting: Cardiac rehabilitation unit, Dijon University Hospital. Participants: Fourteen stable disease after percutaneous intervention. Intervention: Patients followed 15 sessions (1 session per day, 3 days a week), either concentric group, following standard programme, or performing resistance exercises using...

In this study we investigated the influence of gender and obesity on electrical current thresholds in an attempt to optimize application skeletal muscle stimulation (ES) clinical practice.Thirty-two obese 35 age-matched, non-obese men women received graded ES quadriceps for sensory (detection) motor (contraction) threshold assessment. Concomitant pain tolerance were recorded.Sensory was lower than (P < 0.001), both non-obese. Sensory higher subjects 0.05), body mass index a strong predictor...

Beta-band oscillations have been suggested to promote the maintenance of current motor (or cognitive) set, thus signaling 'status quo' system. While this hypothesis has reliably demonstrated in many studies, it fails explain changes beta-band activity due accumulation physical fatigue. In study, we aimed reconcile functional role beta during fatigue within status quo theory. Using an innovative electroencephalography design, identified two distinct power dynamics areas as rises: (i)...

Physiological aging leads to a progressive weakening of muscles and tendons, thereby disturbing the ability control postural balance consequently increasing exposure risks falls. Here, we introduce simple easy-to-use neuromuscular electrical stimulation (NMES) training paradigm designed alleviate deficit in elderly, first hallmarks which present as functional impairment. Nine pre-frail older women living long-term care facility performed 4 weeks NMES on their plantarflexor muscles, seven...

During voluntary contractions, corticomuscular coherence (CMC) is thought to reflect a mutual interaction between cortical and muscle oscillatory activities, respectively measured by electroencephalography (EEG) electromyography (EMG). However, it remains unclear whether CMC modulation would depend on the contribution of neural mechanisms acting at spinal level. To this purpose, modulations were compared during submaximal isometric, shortening lengthening contractions soleus (SOL) medial...

This study was designed to investigate the influence of muscle contraction type on spinal recurrent inhibition during maximal voluntary contractions (MVC) plantar flexor muscles.To that purpose, paired Hoffmann-reflex (H-reflex) technique permitted assess changes in pathway by comparing modulations test, reference and conditioning H-reflexes (H', Href H1 respectively) soleus isometric, concentric eccentric MVC. Twenty-five subjects participated an experimental session activity pathway.The...

The 200-m fast-walk test has been proposed as a high- intensity performance in healthy, elderly subjects. Adaptation of low-risk coronary artery disease patients during this were compared with those 6-min walk and maximal cardiopulmonary exercise test.Thirty stable (51.9 +/- 8.7 yrs), referred to the cardiac rehabilitation department, performed test, then random order, before after training period (6 wks, 3 days per week). Heart rate was monitored each test. Peak workload distance walked on...

Recent findings provided evidence that spinal regulatory mechanisms were involved in corticomuscular coherence (CMC) modulation between contraction types. Although their relative contributions could not be precisely identified, it was suggested recurrent inhibition (RI) modulate CMC by regulating the synchronization of motoneuron activity. To confirm this hypothesis, concurrent modulations RI and for soleus (SOL) compared during submaximal isometric, shortening lengthening plantar flexions....

Abstract While physical performance has long been thought to be limited only by physiological factors, many experiments denote that psychological ones can also influence it. Specifically, the deception paradigm investigates effect of factors on manipulating a variable unbeknownst subjects. For example, during exercise performed failure, previous results revealed an improvement in (i.e., holding time) when clock shown subjects was deceptively slowed down. However, underlying...

Abstract Beta-band oscillations have been suggested to promote the maintenance of current motor (or cognitive) set, thus signaling ‘status quo’ system. While this hypothesis has reliably demonstrated in many studies, it fails explain changes beta-band activity due accumulation physical fatigue. In study, we aimed reconcile functional role beta during fatigue within status quo theory. Using an innovative EEG design, identified two distinct power dynamics areas as rises: (i) enhancement at...

ABSTRACT Purpose Increase in recurrent inhibition was observed during eccentric compared with isometric and concentric maximal voluntary contractions but the neural mechanisms involved this specific control of Renshaw cell activity are unknown. This study designed to investigate supraspinal anisometric plantar flexor muscles. Methods To that purpose, paired Hoffmann-reflex (H-reflex) technique permitted assess changes homonymous pathway by comparing modulations test conditioning H-reflexes (...

Original results are that in response to passive muscle lengthening and increased length, inhibition of the effectiveness activated Ia afferents discharge α-motoneurons increases, with primary afferent depolarization homosynaptic postactivation depression mechanisms playing central roles this regulatory process. Our findings highlight for first time a cumulative inhibitory effect length on α-motoneurons.