5) The main advantage of 1RM testing is that it is tested with free weights. It is convenient as no special equipment is needed. Also, a lifter can lift more than his expectation in 1RM that works as motivation to achieve higher goals. It is a well tested and practical method which is considered a gold standard test among trainers world-wide.
The main disadvantage of lifting maximum weight in 1 repetition is that lifter is prone to injuries if not done correctly. A thorough warm-up should be done before 1RP, also 24 hrs rest is needed before 1RP. It is time-consuming.
Other testing methods like 6RM are safer.
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