Submaximal Elastic Resistance Band Tests to Estimate Upper and Lower Extremity Maximal Muscle Strength

Bjarki T. Haraldsson, Christoffer H. Andersen, Katrine T. Erhardsen, Mette K. Zebis, Jéssica K. Micheletti, Carlos M. Pastre and Lars L. Andersen
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Bjarki T. Haraldsson: Department of Physiotherapy, University College Copenhagen, DK-2200 Copenhagen, Denmark
Christoffer H. Andersen: Department of Physiotherapy, University College Copenhagen, DK-2200 Copenhagen, Denmark
Katrine T. Erhardsen: Department of Physiotherapy, University College Copenhagen, DK-2200 Copenhagen, Denmark
Mette K. Zebis: Department of Physiotherapy, University College Copenhagen, DK-2200 Copenhagen, Denmark
Jéssica K. Micheletti: Department of Physiotherapy, São Paulo State University (UNESP), 305 Roberto Simonsen, Presidente Prudente, São Paulo 19060-900, Brazil
Carlos M. Pastre: Department of Physiotherapy, São Paulo State University (UNESP), 305 Roberto Simonsen, Presidente Prudente, São Paulo 19060-900, Brazil
Lars L. Andersen: National Research Centre for the Working Environment, DK-2100 Copenhagen, Denmark

IJERPH, 2021, vol. 18, issue 5, 1-13

Abstract: Muscle strength assessment is fundamental to track the progress of performance and prescribe correct exercise intensity. In field settings, simple tests are preferred. This study develops equations to estimate maximal muscle strength in upper- and lower-extremity muscles based on submaximal elastic resistance tests. Healthy adults ( n = 26) performed a maximal test (1 RM) to validate the ability of the subsequent submaximal tests to determine maximal muscle strength, with elastic bands. Using a within-group repeated measures design, three submaximal tests of 40%, 60%, and 80% during (1) shoulder abduction, (2) shoulder external rotation, (3) hip adduction, and (4) prone knee flexion were performed. The association between number of repetitions and relative intensity was modeled with both 1st and 2nd order polynomials to determine the best predictive validity. For both upper-extremity tests, a strong linear association between repetitions and relative intensity was found (R 2 = 0.97–1.00). By contrast, for the lower-extremity tests, the associations were fitted better with a 2nd order polynomial (R 2 = 1.00). The results from the present study provide formulas for predicting maximal muscles strength based on submaximal resistance in four different muscles groups and show a muscle-group-specific association between repetitions and intensity.

Keywords: muscle fatigue; resistance training; 1-repetition maximum; prediction (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2021
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