Stability of biceps brachii MMax with one session of strength training.
The maximal compound muscle action potential (Mmax ) of biceps brachii is altered by 1 session of strength training. We examined whether the number of training sets in a session plays a role in this effect.



Ten subjects completed 1 session of isometric strength training of the elbow flexors (2 sets, 75% maximal force with 1 arm; 12 sets with the other). Biceps Mmax was acquired in both arms before training, immediately after training, and every 5 min for 30 min.



Mmax area was initially potentiated after 2 (7.2%) and 12 sets (13.6%) but returned to baseline within 5 min.



Biceps Mmax is similarly affected by 2 and 12 sets of strength training. The overall effect is minimal compared with ∼25% depression reported after similar training in a different arm posture. Thus, changes in Mmax appear more dependent on training posture than number of training sets. Muscle Nerve 54: 791-793, 2016.
Neuroscience Research Australia, PO Box 1165, Randwick, NSW, Australia, 2031.|School of Medical Sciences, University of New South Wales, Kensington, NSW, Australia.
James L
JL
Nuzzo
Neuroscience Research Australia, PO Box 1165, Randwick, NSW, Australia, 2031.|School of Medical Sciences, University of New South Wales, Kensington, NSW, Australia.
Benjamin K
BK
Barry
Neuroscience Research Australia, PO Box 1165, Randwick, NSW, Australia, 2031.|Prince of Wales Clinical School, University of New South Wales, Kensington, NSW, Australia.
Simon C
SC
Gandevia
Neuroscience Research Australia, PO Box 1165, Randwick, NSW, Australia, 2031. j.taylor@neura.edu.au.|School of Medical Sciences, University of New South Wales, Kensington, NSW, Australia. j.taylor@neura.edu.au.
Janet L
JL
Taylor
D000200:Action Potentials / Q000502:physiology*; D000293:Adolescent; D000328:Adult; D004551:Elbow Joint / Q000502:physiology; D005260:Female; D006801:Humans; D007537:Isometric Contraction / Q000502:physiology*; D008297:Male; D018482:Muscle, Skeletal / Q000502:physiology*; D055070:Resistance Training / Q000379:methods*; D055815:Young Adult
M-wave; Mmax; biceps brachii; maximal compound muscle action potential; posture; strength training