He said that it was not his intention to replace freeweights with his machines.
In other words, the weight of the chains ‘accommodates’ (i.e.
gets heavier or lighter) alongside the athlete’s ability to produce force – when they are in either a stronger position or a weaker one.
Then a few of the more thoughtfulathletes and trainers realized that the ability of a muscle torapidly generate maximum force involves a time/rate dependency thattheir current training technology was unable to address adequately. Eventually four categories ofdevice could be discerned (Hatfield et al.,1999): Most sport scientists agree that machines are generally inferiorto the constant resistance provided by free weights.
Nevertheless,derivative technologies continue to flood the marketplace.
In a personal communication to me, Naidus wrote: I believe the features of my machines are excellent for permitting the exerciser to engage in different and unique routines in every workout, thereby serving to stimulate the muscles and impose upon them new patterns of workloads.
This should ultimately result in constant adaptation, and better strength gains. This, from an old gym rat: it's certainly wortha try! Stephen Plisk pointed out that the machine is a modified versionof those designed to exercise muscle groups in isolation. The author thought thisassessment was "a bit harsh", because they "work fine at producingoverload".As the athlete moves up towards the end position of an exercise, they are also typically moving up the ascending strength curve (Figure 2).As they move up, the weight gets heavier, and vice versa.Reviewed by: William J Kraemer Ph D, Human Performance Laboratory, Ball State University, Muncie, Indiana 47306; Steven S Plisk, MS CSCS, Director of Sports Conditioning, Yale University, New Haven, Connecticut 06520 A new strength-training machine allows the user to instantly change resistance at any point in the exercise movement.The machine has the potential to improve strength by optimizing the time each targeted muscle spends under maximum stress.As a result, Table 1 provides a simple ‘guide’ to the mass-displacement relationships of a variety of chains, and is also downloadable and printable for use in gym facilities.