The velocity of movement and applied load affect the production of mechanical power output and subsequently the extent of the adaptation stimulus in strength exercises. We do not know of any known function describing the relationship of power and velocity and load in the bench press exercise. The objective of the study is to find a function modeling of the relationship of relative velocity, relative load and mechanical power output for the bench press exercise and to determine the intensity zones of the exercise for specifically focused strength training of soccer players. Fifteen highly trained soccer players at the start of a competition period were studied. The subjects of study performed bench presses with the load of 0, 10, 30, 50, 70 and 90% of the predetermined one repetition maximum with maximum possible speed of movement. The mean measured power and velocity for each load (kg) were used to develop a multiple linear regression function which describes the quadratic relationship between the ratio of power (W) to maximum power (W) and the ratios of the load (kg) to one repetition maximum (kg) and the velocity (m•s(-1)) to maximal velocity (m•s(-1)). The quadratic function of two variables that modeled the searched relationship explained 74% of measured values in the acceleration phase and 75% of measured values from the entire extent of the positive power movement in the lift. The optimal load for reaching maximum power output suitable for the dynamics effort strength training was 40% of one repetition maximum, while the optimal mean velocity would be 75% of maximal velocity. Moreover, four zones: maximum power, maximum velocity, velocity-power and strength-power were determined on the basis of the regression function.

Human Motion Diagnostics Center University of Ostrava Czech Republic

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Baker D, Nance S, Moore M. The load that maximizes the average mechanical power output during explosive bench press throws in highly trained athletes. J Strength Cond Res. 2001a;15:20–24. PubMed

Baker D, Nance S, Moore M. The load that maximizes the average mechanical power output during jump squats in power-trained athletes. J Strength Cond Res. 2001b;15:92–97. PubMed

Bonnans JF, Gilbert JC, Lemaréchal C, Sagastizábal CA. Numerical Optimization: Theoretical and Practical Aspects. Springer. 2006

Caldwell GE. Muscle modeling. In: Robertson G, Caldwell G, Hamill J, Kamen G, Whittlesey S, editors. Research methods in Biomechanics. Human Kinetics; Champaign: 2004. pp. 183–209.

Carpinelli RN. The size principle and a critical analysis of the unsubstantiated heavier-is-better recommendation for resistance training. J Exerc Sci Fit. 2008;6:67–86.

Cormie P, McBride J, McCaulley G. Validation of power measurement techniques in dynamic lower body resistance exercises. J Appl Biomech. 2007a;23:103–118. PubMed

Cormie P, McCaulley G, Triplett N, McBride J. Optimal loading for maximal power output during lower-body resistance exercises. Med Sci Sport Exer. 2007b;39:340–349. PubMed

Hill AV. The heat of shortening and the dynamic constants of muscle. Proceedings of the Royal Society. 1938;B126:136–95.

Hori N, Newton R, Nosaka K, McGuigan M. Comparison of Different Methods of Determining Power Output in Weightlifting Exercises. Strength Cond J. 2006;28:34–40.

Jandacka D, Uchytil J. Optimal load maximizes the mean mechanical power output during upper body exercise in highly trained soccer players. J Strength Cond Res. in press; PubMed

Jandacka D, Vaverka F. A regression model to determine load for maximum power output. Sport Biomech. 2008;7:361–371. PubMed

Jandacka D, Vaverka F. Validity of mechanical power measurement at bench press exercise. J Human Kinetics. 2009;21:33–43.

Jidovtseff B, Quièvre J, Hanon C, Crielaard J. Inertial muscular profiles allow a more accurate training loads definition. Sci Sport. 2009;24:91–96.

Kawamori N, Crum A, Blumert P, et al. Influence of different relative intensities on power output during the hang power clean: identification of the optimal load. J Strength Cond Res. 2005;19:698–708. PubMed

Kovaleski J, Heitman R, Scaffidi F, Fondren F. Effects of isokinetic velocity spectrum exercise on average power and total work. J Athl Training. 1992;27:54–56. PubMed PMC

Kraemer JW, Newton RU. Training for muscular power. Sci pricip sport rehab. 2000;11:341–368. PubMed

Kraemer JW, Ratamess AN, Fry CA, French ND. Strength Training: Development and Evaluation of Methodology. In: Maud JP, Foster C, editors. Physiological Assessment of Human Fitness. Human Kinetics; Champaign: 2006. pp. 119–150.

Li L, Olson M, Winchester J. A proposed method for determining peak power in the jump squat exercise. J Strength Cond Res. 2008;22:326–331. PubMed

Miller C. Développement des capacités musculaires. In : Entraînement de la force - spécificité et planification. Les cahiers de l’Insep. 1997:49–84.

Newton R, Murphy A, Humphries B, Wilson G, Kraemer W, Hakkinen K. Influence of load and stretch shortening cycle on the kinematics, kinetics and muscle activation that occurs during explosive upper-body movements. Eur J Appl Physiol Occup Physiol. 1997;75:333–342. PubMed

Thomas G, Kraemer W, Spiering B, Volek J, Anderson J, Maresh C. Maximal power at different percentages of one repetition maximum: influence of resistance and gender. J Strength Cond Res. 2007;21:336–342. PubMed

Zatsiorsky VM. Kinetics of Human Motion. Human Kinetics; Champaign: 2002. pp. 528–529.

Zatsiorsky VM, Kraemer JW. Science and practice of strength training. Human Kinetics; Champaign: 2006. pp. 194–195.