Relationship between Maximum Strength and Relative Endurance for the Empty-Can Exercise

Abstract

Context:A strength-endurance diagram predicts that a person should be able to perform 30 repetitions of an exercise if the resistance level is 60% of 1-repetition maximum (1RM). Objective: To compare the number of repetitions predicted by the diagram with recorded repetitions of a shoulder exercise. Design: Single-group comparison with a standard. Setting: University. Participants: 34 healthy adults (20 women, 14 men) with a mean age of 29 years (range 20-49). Main Outcome Measures: The number of repetitions that subjects could perform in good form of a shoulder exercise with resistance of 60% 1RM. Results: The mean number of repetitions was 21 (± 3, range 15-28), which was significantly different than the 30 repetitions that the diagram predicted. Conclusions: The strength-endurance diagram did not accurately predict the number of repetitions of a shoulder exercise that subjects could perform.

Practical recommendations for exercise training in patients with COPD

“…However, the principle of deriving strength training intensities from the 1RM must be critically considered. Due to a large interindividual discrepancy and a wide range of variability of the number of possible repetitions at a certain percentage of the 1RM, the ideal resistance for many individuals may be over-or underestimated [54,55]. Therefore, the main focus could rather be on targeting local muscular exhaustion within the range of six to 12 repetitions (in other words determine a six to 12 repetition maximum) rather than reaching a certain percentage of the 1RM.…”