Jämförelse mellan styrketräning med fria vikter och med pneumatiskt motstånd

[King Grub]

Because free weight (FW) and pneumatic (PN) resistance are characterized by different inertial properties, training with either resistance could afford unique strength, velocity and power adaptations. Eighteen resistance-trained men completed baseline tests to determine their FW and PN bench press 1RM. During the FW session, 4 explosive repetitions were performed at loads of 15, 30, 45, 60, 75 and 90% 1RM to assess force, velocity and power. Participants were then assigned to a FW or PN training group, which involved three 90-minute sessions/week for 8 weeks. Both intervention groups completed identical periodized programs with the exception of the resistance used to perform all bench press movements. FW participants significantly increased their FW and PN 1RM (10.4% and 9.4%), and maximum (any load) force (9.8%), velocity (11.6%), and power (22.5%). PN-trained participants also exhibited increases in FW and PN 1RM (11.6% and 17.5%), and maximum force (8.4%), velocity (13.6%), and power (33.4%). Both interventions improved peak barbell velocity at loads of 15% and 30% 1RM; however, only the PN-trained individuals displayed improvements in peak force and power at these same loads. Training with PN resistance may offer advantages if attempting to improve power at lighter relative loads by affording an opportunity to consistently achieve higher accelerations and velocities (F=ma), in comparison to FW. Exploiting the inertial properties of the resistance, whether mass, elastic or pneumatic, could afford an opportunity develop mixed-method training strategies and/or elicit unique neuromuscular adaptations to suit the specific needs of athletes from sports characterized by varying demands.

J Strength Cond Res. 2015 Sep 23. Changes in maximal strength, velocity and power following eight weeks of training with pneumatic or free weight resistance.