Neuromuscular fatigue induced by alternating isometric contractions of the ankle plantar and dorsiflexors

摘要: Ankle muscle activity is important in regulating postural control as well more complex movement tasks. Fatigue of these muscles clearly influences stability; however, the mechanisms responsible for this change have not been characterized. In study fatigue produced plantar (PF) and dorsiflexors (DF) during intermittent, isometric contractions was examined recovery process monitored ten minutes post-fatigue. Fifteen healthy participants alternated between PF DF until torque reduced to >50% pre-fatigue maximal voluntary contraction level both directions. Peripheral identified by measuring twitch M-wave amplitude pre Central determined comparing activation The protocol decreased production similar levels; characteristics were different two groups. This demonstrates that although antagonist can be same level, may therefore impact motor tasks way.