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.The pushup is a classic example of a constant resistance body weight exercise, as the weight load is the same on both the lowering and rising phases.Traditional planks, side planks, squats and lunges are also in this category as the load is constant throughout the movement of the exercise.
Compared with the way that many train though, powerlifting seems like an improvement.
Training tools such as medicine balls, kettlebells and resistance bands also provide constant resistance.
Medicine balls and kettlebells can often be used in place of free weights, and resistance bands can help to strengthen all of the major muscle groups in the body.
Whether it is more effective than other machines or free weights remains to be seen.
Those of you who, like me, have spent nearly 50 years in theweight room will recall all manner of equipment that promised torevolutionize training.
You see more explosive lifting and very-low rep sets.