Determining Heavy Loads and Understanding Intensity in Weight Lifting

Use actual intensity, relative intensity, and perceived intensity to dial in your weight training.

Many books on weight training will have chapters on intensity and its importance. They describe 100% intensity as being whatever weight one can only do one rep of within a certain exercise. If you can do more than one rep of the particular exercise then its intensity is lower. Thus, the more reps one can do, the lower the intensity the weight will be.

 

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source https://breakingmuscle.com/fitness/determining-heavy-loads-and-understanding-intensity-in-weight-lifting