"An EMG is a device that is used for measuring extremely small amounts of electricity generated by muscles below the surface of the skin (...) Electromyographical (EMG). Muscle contraction is initiated by electrical charges that travel across the membrane of muscle fibers. This movement of ion flow can be measured on the skin by a surface electromyogram (SEMG) (2; 5) An SEMG provides a representation of the entire electrical activity of the motor units and the frequency of their firing rates for each muscle being examined (1; 4). (...) Beside the number is the percentage of muscle fibers worked:
Pectoralis major:
Decline dumbbell bench press - 93
Decline bench press (Olympic bar) - 89
Push-ups between benches - 88
Flat dumbbell bench press - 87
Flat bench press (Olympic bar) - 85
Flat dumbbell flys - 84"
1. DeLuca, Fj., R.S. LeFever, M.P. McCue, and A.P. Xenakis. (1982), “Behavior of human motor units in different muscles during lineally varying contractions” Journal Physiology (Lond), 329:113-128.
2. Kobayashi Matsui, H. (1983), “Analysis of myoelectric signals during dynamic and isometric contraction.” Electromyog Clin Neurophysiol, 26, 147-160.
3. Melo, G.L. and E. Cafarelli. (1994-95), Exercise Physiology Laboratory Manual, 25.
4. Moritani, T. and H.A. deVries. (1987), “Re-examination of the relationship between the surface integrated electromyogram (IEMG) and force of isometric contraction.” American Journal of Physiological Medicine, 57:263-277.
5. Moritani, T., M. Muro, and A. Nagata. (1986), “Intramuscular and surface electromyogram changes during muscle fatigue.” Journal of Applied Physiology, 60:1179-1185.
vamos que lo que mas recluta es el declinado
yo pienso que una rutina de pecho con press inclinado y unos fondos estaria bastante bien