The Overload Principle for Fitness: How Hard Should You Work Out? | Ray the F... - 0 views
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The Principle of Overload asserts that you must gradually and systematically increase your fitness training load. Overloading causes changes within your muscles as a direct result of the type of training you perform. Because your body gets used to working out at a particular level, you must progressively increase your work load in order to continue to improve.
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For strength, lift weights at 60-100% of your single maximum repetition (1 RM) for specific lifts (e.g., squat, bench press). However, if you are not conditioned, testing 1 RM is not advisable nor is it feasible for all exercises. One RM calculators offer a safer way to estimate the weight you can lift for a single repetition.