Changes in cortical excitability and blood lactate after a fatiguing hand-grip exercise.

Coco, Marinella; Alagona, Giovanna; Perciavalle, Valentina; Perciavalle, Vincenzo; Cavallari, Paolo; Caronni, Antonio

Coco, Marinella; Alagona, Giovanna; Perciavalle, Valentina; Perciavalle, Vincenzo; Cavallari, Paolo; Caronni, Antonio.

Affiliation

Coco M; Department of Bio-Medical Sciences, Università degli Studi di Catania , Italy .

Somatosens Mot Res ; 31(1): 35-9, 2014 Mar.

Article in En | MEDLINE | ID: mdl-24044581

ABSTRACT

ABSTRACT

Excitability of primary hand motor cortex (PHMC), evaluated with transcranial magnetic stimulation by using the "1 mV resting motor threshold" method, and capillary blood lactate were measured at the end, as well as 5 and 10 min after a fatiguing hand-grip exercise. The relation between blood lactate and the amplitudes of motor-evoked potentials showed a significant direct proportionality. Blood lactate seems to exert a protective role on PHMC against fatigue reduction during extremely intensive isometric exercises.

Subject(s)

Cerebral Cortex/physiology; Evoked Potentials, Motor/physiology; Hand Strength; Isometric Contraction/physiology; Lactic Acid/blood; Muscle Fatigue/physiology; Adult; Humans; Male; Transcranial Magnetic Stimulation

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Full text: 1 Database: MEDLINE Main subject: Cerebral Cortex / Muscle Fatigue / Hand Strength / Evoked Potentials, Motor / Lactic Acid / Isometric Contraction Limits: Adult / Humans / Male Language: En Journal: Somatosens Mot Res Journal subject: NEUROLOGIA / PSICOFISIOLOGIA Year: 2014 Type: Article Affiliation country: Italy

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