Accommodating resistance exercise machines
Some exercise scientists view this as a disadvantage, as it may cause disturbance in the brain centers that interpret force and movement patterns.The advantage of variable resistance fitness equipment is that it amplifies the level of stress placed on the muscles by forcing them to work equally hard throughout the full range of motion.In doing so, you are able to maximize the amount of exercise stress your muscles receive" (source: International Sports Sciences Association; 2001).Accommodating resistance exercise equipment somewhat controls the resistance that is encountered, thereby allowing the user to exert maximum force throughout the entire range of motion and throughout the entire exercise.They spend 30 or 45 seconds at each station, either working a hydraulic resistance machine or doing aerobics. Sufficient anecdotal evidence exists to prove that circuit training can help women achieve fast weight loss.But how about the training technology behind the workout?Critics respond that since everyone is different is size, stature and strength it is virtually impossible to match everybody's leverage with machine leverage.Static Resistance Devices: "Contracting your muscles without movement is called static contraction.
Unlike constant resistance devices, variable resistance fitness equipment does not match the natural way the human body works.
Weight training in this manner has some inherent disadvantages.
First of all, constant resistance weight lifting exercise does not correct for changes in the musculoskeletal leverage that occurs during an exercise movement.
Therefore, the user doesn't gain as much benefit during the 'easy' portion of the movement.
Muscles need stress to gain strength and endurance, so with the relatively diminished stress of constant resistance devices some of the benefit is gone.
This is the type of gym equipment used at circuit training fitness centers.