Contextual overview
The study distinguishes between 'training for coordination' and 'testing for power.' For athletes looking to improve explosiveness, bodyweight jumping is superior for teaching coordination, while loaded jumps (30% BW) are necessary for accurately measuring mechanical power output.
Original publication abstract
The 2020 study by Bermudez et al. investigated how external loads controlled by an FEMD affect lower-limb coordination and power during Squat Jumps (SJ). The results showed that adding loads changes joint coordination patterns, with unloaded jumps being more efficient for rotational-to-vertical velocity transfer.
Check the original article for the population, device, protocol and limitations before applying its results to a different configuration.