Analyzing the potential benefits of using a backpack with non-flexible straps

Mallakzadeh, Mohammadreza; Javidi, Mehrdad; Azimi, Sirwan; Monshizadeh, H.

doi:10.3233/wor-162293

Cited by 9 publications

(6 citation statements)

References 27 publications

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“…In addition, it was reported that a traditional double-strap BP can induce different effects on trunk posture depending on the design of the straps: non-flexible straps caused a non-significant forward tilt of the trunk during gait with respect to the unloaded condition, while traditional straps did so when loaded up to 10% BM, suggesting that the formers as optimal [ 33 ]. It was found that the torso angle in the sagittal plane at a load of 15–25% BM was significantly different when worn with a TP compared to BP, with the former allowing a posture closer to the unloaded condition [ 23 ].…”

Section: Resultsmentioning

confidence: 99%

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Impact of Backpacks on Ergonomics: Biomechanical and Physiological Effects: A Narrative Review

Genitrini

Dotti

Bianca

et al. 2022

IJERPH

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(1) Background: the effects of load carriage packs on human gait biomechanics, physiology and metabolism depend on the weight carried, the design of the pack and its interaction with the user. (2) Methods: An extensive search in the PubMed database was performed to find all the relevant articles using the following keywords: backpack, rucksack, backpack ergonomy and sports backpack; 60 articles were included. (3) Results and significance: Double pack (DP) and T-pack (TP) designs are recommended solutions for school children, compared with backpacks (BP). For soldiers and hikers, a backpack remains the best compromise. A hip belt is recommended for BPs as well as for the back of DPs. Shorter and stiffer shoulder straps combined with a higher and tighter load placement on the back provide the best combination in terms of balance, muscle activation and energy expenditure. It is, therefore, possible to determine guidelines for designing the optimal load carriage system, depending on the application. (4) Conclusions: based on the available evidence, DP and TP are advantageous in terms of posture. DP is better than conventional BPs in terms of balance and muscle activation, but has the disadvantage of limited visibility, thermal sensation and obstructed ventilation. In general, it is desirable not to exceed 40% of body mass (BM).

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Section: Resultsmentioning

confidence: 99%

“…To optimize the interaction with the pack, the use of a hip belt, and non-flexible, shorter shoulder straps would be beneficial in terms of both kinematics and comfort, as well as a more vertical load distribution [ 27 , 32 , 33 , 68 ]. Furthermore, in children, it is desirable not to exceed 10% BM considering the total load.…”

Section: Discussionmentioning

confidence: 99%

Impact of Backpacks on Ergonomics: Biomechanical and Physiological Effects: A Narrative Review

Genitrini

Dotti

Bianca

et al. 2022

IJERPH

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“…Backpacks are among the most popular load carriers in the world and are used by millions of people in everyday professional or sporting activities 1 . Especially in the field of sports, the key factors of comfort, functionality and fit of backpacks are of great importance.…”

Section: Introductionmentioning

confidence: 99%

Development and testing of auxetic shoulder straps for sport backpacks

Parisi,

Colombo,

Fauci

et al. 2024

Preprint

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Auxetic foams and lattices are a promising class of materials characterised by a negative Poisson's ratio that can be used for the development of next-generation sports equipment due to their outstanding properties (e.g., multi- impact behaviour and flexibility). We present an application of these materials in backpacks as a viable alternative to current systems with improved comfort. auxetic designs have been used to create ergonomic shoulder straps for trekking backpacks to improve their thermal comfort by exploiting the expansion of the auxetic cells under tensile load. Further optimisation of the proposed application can be achieved in the future by using the collected data in analytical models to predict the behaviour of these systems.

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“…In order to minimize the effects of carrying heavy backpacks, several models of bags have been proposed. Some of the proposals promote a more upright posture by carrying the load in big pockets at the hip level [31] or replacing the flexible shoulder straps by rigid ones [31]. Interior pockets have also been developed for school backpacks to distribute the weight.…”

Section: Introductionmentioning

confidence: 99%

Effects of a modified backpack model on ground reaction forces in children of different ages during walking and running

Barbosa¹,

Marques²,

Forte³

et al. 2022

JOMH

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Analyzing the potential benefits of using a backpack with non-flexible straps

Abstract: Backpacks cause some bad effects on kinematics of gait. In this study, by testing modified backpacks, some improvements were seen, specifically in posture, which may be useful to reduce side effects of backpack carrying.

Cited by 9 publications

References 27 publications

Impact of Backpacks on Ergonomics: Biomechanical and Physiological Effects: A Narrative Review

Impact of Backpacks on Ergonomics: Biomechanical and Physiological Effects: A Narrative Review

Development and testing of auxetic shoulder straps for sport backpacks

Effects of a modified backpack model on ground reaction forces in children of different ages during walking and running

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