Laurin J, Dousset E, Carrivale R, Grélot L, Decherchi P
UMR CNRS 6233, Institut des Sciences du Mouvement (ISM), Parc Scientifique et Technologique de Luminy, Faculté des Sciences du Sport de Marseille, Etienne-Jules MAREY, Université de la Méditerranée (Aix-Marseille II) - Aix-Marseille Université, Cedex, France.
Scand J Med Sci Sports. 2012 Aug;22(4):534-44. doi: 10.1111/j.1600-0838.2010.01279.x. Epub 2011 Mar 1.
We aimed at determining the recovery pattern of neural properties of soleus muscle after a single bout of neuromuscular electrical stimulation (NMES) session. Thirteen subjects performed an NMES exercise (75 Hz, 40 contractions, 6.25 s per contraction). Maximal voluntary contraction (MVC), H-reflex at rest and during voluntary contraction fixed at 60% of MVC (respectively, H(max) and H(sup) ) and volitional (V) wave were measured before and during the recovery period following this exercise [i.e., immediately after, 2 h (H2), 2 days (D2) and 7 days (D7)]. MVC exhibited an immediate and a delayed declines at 2 days (respectively, -29.8±4.6%, P<0.001; -13.0±3.4%, P<0.05). Likewise, V/M(sup) was decreased immediately and 2 days after NMES session (respectively, -43.3±11.6%, P<0.05; 35.3±6.6%, P<0.05). The delayed decrements in MVC and V-wave occurred concomitantly with muscle soreness peak (P<0.001). It could be concluded that motor command alterations after an NMES resistance session contributed to the immediate and also to the delayed decreases in MVC without affecting resting and active H-reflex excitability. These results suggested that spinal circuitry function of larger motoneurons was inhibited by NMES (as indicated by the depressed V-wave responses) contrary to the smaller one (indicated by the unchanged H-reflex responses).
我们旨在确定单次神经肌肉电刺激（NMES）疗程后比目鱼肌神经特性的恢复模式。13名受试者进行了NMES运动（75Hz，40次收缩，每次收缩6.25秒）。在该运动后的恢复期间（即运动后立即、2小时（H2）、2天（D2）和7天（D7）），测量最大自主收缩（MVC）、静息时和自主收缩固定在MVC的60%时的H反射（分别为H(max)和H(sup)）以及意志（V）波。MVC在2天时出现即刻和延迟下降（分别为-29.8±4.6%，P<0.001；-13.0±3.4%，P<0.05）。同样，NMES疗程后立即和2天时V/M(sup)降低（分别为-43.3±11.6%，P<0.05；-35.3±6.6%，P<0.05）。MVC和V波的延迟下降与肌肉酸痛峰值同时出现（P<0.001）。可以得出结论，NMES阻力疗程后的运动指令改变导致了MVC的即刻和延迟下降，而不影响静息和主动H反射兴奋性。这些结果表明，与较小的运动神经元（由未改变的H反射反应表明）相反，NMES抑制了较大运动神经元的脊髓回路功能（由降低的V波反应表明）。
