Correction to: A Comparison of the Energetic Cost of Running in Marathon Racing Shoes

Hoogkamer, Wouter; Kipp, Shalaya; Frank, Jesse H.; Farina, Emily M.; Luo, Geng; Kram, Rodger

doi:10.1007/s40279-017-0840-x

Cited by 7 publications

(4 citation statements)

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“…The values of ρ BCP represent the density of all electrons, which can be used to characterize the strength of bonds. In general, the larger the ρ BCP value, the stronger the bond is. − The calculated results reveal that the dimer-I has a shorter distance of hydrogen bonds, higher values of ρ BCP , and more BCPs compared with the dimer-S, indicating that hydrogen bonds are stronger in the dimer-I. However, the binding energy of dimer-S (−33.78 kJ mol –1 ) is lower than that of dimer-I (−20.36 kJ mol –1 ), which can be ascribed to the energy attribution of stronger dipole–dipole interactions.…”

Section: Resultsmentioning

confidence: 93%

Concentration-Dependent Conformational Isomerization of Fluorenone-Based Polycatenar in 2D Polymorphic Self-Assembly

Liu

Yuan

et al. 2020

J. Phys. Chem. C

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A fluorenone-based polycatenar consisting of a central 2,7-bis((5-phenylthiophen-2-yl)ethynyl)-9-fluorenone core and −OCH2– linked 3,4,5-tris(dodecyloxy)benzoate unit at both sides (FTQ) has been synthesized by using Sonogashira coupling reactions as key steps. FTQ molecule exhibits columnar liquid crystalline phase. The molecular self-assembled behavior at the solid/liquid interface is investigated by scanning tunneling microscopy (STM). With the decrease of solution concentration, three nanostructures (parallelogram, wave-like, and double-S patterns) are formed at the 1-phenyloctane/HOPG interface. More importantly, the molecular cis–trans isomerization is observed, resulting from different packing fashions of the side chains. The dimers are the basic building units due to the similar C(sp2)–H···OC hydrogen bonds formed between the hydrogen atom in the thiophene group and the oxygen atom in the carbonyl group. Density functional theory (DFT) results show that the isomerized structure constructing by the S-shaped conformation is more stable. We speculate that the double-S structure might be in accordance with the molecular conformation in liquid crystalline phase. Our work is of significance to further explore molecular packing mechanism and stability of fluorenone-based polycatenars with liquid crystal property.

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Section: Resultsmentioning

confidence: 93%

Concentration-Dependent Conformational Isomerization of Fluorenone-Based Polycatenar in 2D Polymorphic Self-Assembly

Liu

Yuan

et al. 2020

J. Phys. Chem. C

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“…Moreover, the thicker midsole extends the effective leg length of the runner. An 8 mm increase in effective leg length could reduce the cost-of-transport for the runner and account for ~25% of the advantage of the Vaporfly 9 10…”

Section: Can We Untangle the 4%?mentioning

confidence: 99%

Is it the shoes? A simple proposal for regulating footwear in road running

Burns

Tam

2019

Br J Sports Med

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“…Increasing the midsole thickness could protonate the effective leg length of the runner such as the VF shoe which has a 31 mm heel height [ 20 ]. It could decrease energy loss for the runner by increasing an 8 mm effective leg length [ 21 , 22 ]. Besides, some researchers also figured out that the effect of midsole thickness is about 1% for running economy [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of the Construction of Carbon Fiber Plate Insert to Midsole on Running Performance

Fu¹,

Levadnyi²,

Wang³

et al. 2021

Materials

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In this paper, to investigate the independent effect of the construction of the forefoot carbon-fiber plate inserted to the midsole on running biomechanics and finite element simulation, fifteen male marathon runners were arranged to run across a runway with embedded force plates at two specific running speeds (fast-speed: 4.81 ± 0.32 m/s, slow-speed: 3.97 ± 0.19 m/s) with two different experimental shoes (a segmented forefoot plate construction (SFC), and a full forefoot plate construction (FFC)), simulating the different pressure distributions, energy return, and stiffness during bending in the forefoot region between the SFC and FFC inserted to midsole. Kinetics and joint mechanics were analyzed. The results showed that the footwear with SFC significantly increased the peak metatarsophalangeal joint (MTPJ) plantarflexion velocity and positive work at the knee joint compared to the footwear with FFC. The results about finite element simulation showed a reduced maximum pressure on the midsole; meanwhile, not significantly affected was the longitudinal bending stiffness and energy return with the SFC compared to the FFC. The results can be used for the design of marathon running shoes, because changing the full carbon fiber plate to segment carbon fiber plate induced some biomechanical transformation but did not significantly affect the running performance, what is more, reducing the peak pressure of the carbon plate to the midsole by cutting the forefoot area of the carbon fiber plate could be beneficial from a long-distance running perspective for manufacturers.

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Correction to: A Comparison of the Energetic Cost of Running in Marathon Racing Shoes

Cited by 7 publications

References 0 publications

Concentration-Dependent Conformational Isomerization of Fluorenone-Based Polycatenar in 2D Polymorphic Self-Assembly

Concentration-Dependent Conformational Isomerization of Fluorenone-Based Polycatenar in 2D Polymorphic Self-Assembly

Is it the shoes? A simple proposal for regulating footwear in road running

Effect of the Construction of Carbon Fiber Plate Insert to Midsole on Running Performance

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