One method of developing strength and power is flywheel inertial training, which has become increasingly popular over the last two decades. This method makes use of specialized devices that utilize rotational inertia resistance, and hence it differs from more traditional forms of resistance training

During inertial training, brief episodes of eccentric overload occur, and the peak value of force during inertial exercise is greater than during standard weight training. Several studies have confirmed the efficacy of this training for improving strength and power, and training with the peak power output has been found to promote the greatest increases in power. A recent research “Effects of a 10-Week In-Season Eccentric-Overload Training Program on Muscle-Injury Prevention and Performance in Junior Elite Soccer Players” (Moisés de Hoyo, Marco Pozzo, Borja Sañudo, Luis Carrasco, Oliver Gonzalo-Skok, Sergio Domínguez-Cobo, and Eduardo Morán-Camacho; International Journal of Sports Physiology and Performance, 2015, 10, 46-52) analyze the effect of an eccentric-overload training program using flywheel ergometers with individualized load on muscle-injury incidence and severity and performance in junior elite soccer players. The study, concludes that eccentric-based program led to a reduction in muscle-injury incidence and severity and showed improvements in common soccer tasks such as jumping ability and linear-sprinting speed.