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Vol. 23. Num. 1.01 January 2019
Pages 1-76
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Vol. 23. Num. 1.01 January 2019
Pages 1-76
Original Research
DOI: 10.1016/j.bjpt.2018.07.001
Mechanical properties, safety and resistance values of Lemgruber® elastic tubing
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570
Fabiano Francisco de Limaa, Carlos Augusto Camillob, Elton Aparecido Prado dos Reisc, Aldo Eloizo Jobc, Bruna Spolador de Alencar Silvaa, Marko Topalovicd, Dionei Ramosa, Ercy Mara Cipulo Ramosa,
Corresponding author
ercy@fct.unesp.br

Corresponding author at: Departamento de Fisioterapia, Universidade Estadual Paulista “Júlio de Mesquita Filho”, Rua Roberto Simonsen, n 305, Presidente Prudente, SP 19060-900, Brazil.
a Departamento de Fisioterapia, Faculdade de Ciências e Tecnologia, Universidade Estadual Paulista (UNESP), Presidente Prudente, SP, Brazil
b Departamento de Fisioterapia, Programa de Pós-Graduação em Ciências da Reabilitação, Universidade Estadual de Londrina (UEL) / Universidade do Norte do Paraná (UNOPAR), Londrina, PR, Brazil
c Departamento de Física, Faculdade de Ciências e Tecnologia, Universidade Estadual Paulista (UNESP), Presidente Prudente, SP, Brazil
d Department of Biomedical Sciences, Laboratory of Pneumology, KU Leuven, Leuven, Belgium
Highlights

  • Lemgruber® elastic tubes (LET) can be safely stretched up to 8 times in length.

  • Resistance from individual tubes varies from 3N to 537N depending on elongation.

  • Reference equations for resistance and elongation are provided.

  • Results offer increased knowledge of LET for its use in clinical practice.

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Table 1. Reference equations for the resistance according to elongation.
Abstract
Background

Lemgruber® elastic tubing has been used as an adjunct to exercise training with positive effects in healthy adults and in patients with chronic lung disease. Despite its benefits, there is a lack of information on the specific resistance, elongation, reproducibility and safety of the different types of Lemgruber® elastic tubing.

Objectives

The primary outcome was to assess the length-resistance relation (E/R) of five Lemgruber® elastic tubing of different diameters. Secondary outcomes included the development of reference equations of resistance according to elongation of Lemgruber® elastic tubing types and; the description of Lemgruber® elastic tubing safety and; the description of elongation of Lemgruber® elastic tubing using a clinically useful outcome (i.e. range of motion, in degrees).

Methods

The relation between elongation and resistance of Lemgruber® elastic tubing was investigated in a laboratory environment. Secondly, reference equations for the resistance according to the elongation in each Lemgruber® elastic tubing were calculated. Finally, the elongation of the tubing during movements in different degrees of range of motion were estimated using mathematical models, so that the resistance provided by the tubing for any exercise could be predicted.

Results

Lemgruber® elastic tubing provided a large array of resistance varying from 3±0.1Newtons (N) to 537±13N (mean±standard deviation). The maximal resistance deemed safe for each of the five Lemgruber® elastic tubing were: 173±25N, 280±23N, 409±40N, 395±37N and 537±13N. Reference equations had nearly perfect predictive power (r2=0.99) for all polynomial non-linear models (p<0.001 for all).

Conclusions

Lemgruber elastic tubing progressively increased resistance with increased elongation. The large array of resistances delivered by Lemgruber® elastic tubing, along with its safety and good estimation of reference values, support its use in clinical practice.

Keywords:
Elastic resistance
Exercise
Resistance training

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