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During any given resistance exercise, your muscles are stronger at different points of a repetition and weaker at others. Dynamic variable resistance training serves to even out this force curve. This trains your muscles to work at maximum speed throughout a lift. This will make you stronger, and it could positively influence muscle hypertrophy due to the fact that this type of training forces you to recruit more muscle fibers due to more effort being exerted throughout the course of a lift.
Equipment for dynamic variable resistance training serves to make the weight lighter at the bottom of the lift where the muscles are normally their weakest, and heavier at the top of the lift where the muscles are at their strongest. This can be in the form of chains or resistance bands attached to the end of a barbell to make the weight heavier as it is lifted.
According to strength experts Vladimir Zatsiorsky and William Kraemer, the point of dynamic variable training is not to induce maximal strength but to improve the rate of force development and explosive strength. This training will help you to lift with more velocity and explosion. This is important to athletes like football players who need to be explosive, and it is important to those seeking aesthetic goals because it will help them to recruit more muscle fibers, leading to greater stress on the central nervous system. This will help to increase your basal metabolic rate and will lead to greater muscle hypertrophy.
If you are following a strength program, program at least one dynamic variable upper-body workout and one dynamic variable lower-body workout per week. These should be programmed in addition to maximal strength and hypertrophy workouts for the upper and lower body as well as several cardio sessions per week to get the maximum health and fitness benefit.
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