Sports Medicine - Open volume 6 , Article number: 31 Cite this article. Metrics details. The testβretest reliability of the one-repetition maximum 1RM test varies across different studies. Given the inconsistent findings, it is unclear what the true reliability of the 1RM test is, and to what extent it is affected by measurement-related factors, such as exercise selection for the test, the number of familiarization trials and resistance training experience.
The aim of this paper was to review studies that investigated the reliability of the 1RM test of muscular strength and summarize their findings. Searches for studies were conducted through eight databases. All the studies were of moderate or excellent methodological quality. Testβretest ICCs ranged from 0. The CVs ranged from 0. Most studies did not find systematic changes in test results between the trials. Based on the results of this review, it can be concluded that the 1RM test generally has good to excellent testβretest reliability, regardless of resistance training experience, number of familiarization sessions, exercise selection, part of the body assessed upper vs.
Researchers and practitioners, therefore, can use the 1RM test as a reliable test of muscular strength. The reliability of the test seems to be high regardless of resistance training experience, number of familiarization sessions, exercise selection, part of the body assessed upper vs.
Higher levels of muscular strength may result in better performance in a range of sport-specific tasks and decrease the risk of injuries in athletes [ 1 ]. An adequate level of muscular strength is also needed for a range of activities of daily life.
In older adults, for example, greater strength improves physical functioning and quality of life and reduces the risk of falls [ 2 , 3 , 4 ]. Higher muscular strength is also associated with a reduced risk of premature mortality [ 5 ]. Taking these factors into account, it is not surprising that organizations such as the American College of Sports Medicine ACSM and the World Health Organization WHO recommend participating in muscular-strengthening activities on a regular basis [ 6 , 7 ].
