Influence of midsole ‘actuator lugs’ on running economy in trained distance runners

Moran, Mark; Greer, Beau Kjerulf

doi:10.1080/19424280.2013.792878

Cited by 7 publications

(3 citation statements)

References 24 publications

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“…This test, previously used in elite runners (27), entails subjects approximating their 3K race pace for treadmill speed and a progressive increase in grade every two minutes. All metabolic testing was conducted using Parvo Medics TrueOne Metabolic Cart (Parvo Medics, Sandy UT, USA) and a Woodway Desmo treadmill (Woodway USA Inc., Waukesha WI, USA).…”

Section: Methodsmentioning

confidence: 99%

Acute Effects of Plyometric and Resistance Training on Running Economy in Trained Runners

Marcello

Greer

2017

Journal of Strength and Conditioning Research

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Marcello, RT, Greer, BK, and Greer, AE. Acute effects of plyometric and resistance training on running economy in trained runners. J Strength Cond Res 31(9): 2432-2437, 2017-Results regarding the acute effects of plyometrics and resistance training (PRT) on running economy (RE) are conflicting. Eight male collegiate distance runners (21 ± 1 years, 62.5 ± 7.8 ml·kg·min V[Combining Dot Above]O2 peak) completed V[Combining Dot Above]O2 peak and 1 repetition maximum (1RM) testing. Seven days later, subjects completed a 12 minutes RE test at 60 and 80% V[Combining Dot Above]O2 peak, followed by a PRT protocol or a rested condition of equal duration (CON). The PRT protocol consisted of 3 sets of 5 repetitions at 85% 1RM for barbell squats, Romanian deadlifts, and barbell lunges; the same volume was used for resisted lateral lunges, box jumps, and depth jumps. Subjects completed another RE test immediately after the treatments and 24 hours later. Subjects followed an identical protocol 6 days later with condition assignment reversed. Running economy was determined by both relative V[Combining Dot Above]O2 (ml·kg·min) and energy expenditure (EE) (kcal·min). There was a significant (p ≤ 0.05) between-trial increase in V[Combining Dot Above]O2 (37.1 ± 4.2 ml·kg·min PRT vs. 35.5 ± 3.9 ml·kg·min CON) and EE (11.4 ± 1.3 kcal·min PRT vs. 11.0 ± 1.4 kcal·min CON) immediately after PRT at 60% V[Combining Dot Above]O2 peak, but no significant changes were observed at 80% V[Combining Dot Above]O2 peak. Respiratory exchange ratio was significantly (p ≤ 0.05) reduced 24 hours after PRT (0.93 ± 0.0) as compared to the CON trial (0.96 ± 0.0) at 80% V[Combining Dot Above]O2 peak. Results indicate that high-intensity PRT may acutely impair RE in aerobically trained individuals at a moderate running intensity, but that the attenuation lasts less than 24 hours in duration.

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Section: Methodsmentioning

confidence: 99%

Acute Effects of Plyometric and Resistance Training on Running Economy in Trained Runners

Marcello

Greer

2017

Journal of Strength and Conditioning Research

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“…As most of the runners in this study maintained a RFS landing when running in the new shoe model, it might impede the deformation and the energy return process of the actuator lugs (Nigg & Segesser, 1992). A previous study reported an improvement in running economy in elite runners when running in a similar shoe model (Moran & Greer, 2013), which is supposed to lead to a more efficient energy exchange during running (Gruber, Umberger, Braun, & Hamill, 2013;Ogueta-Alday, Rodríguez-Marroyo, & García-López, 2014). Compared to that particular study, our study showed contradictory result when analysing the energy exchange using a biomechanical approach.…”

Section: Discussionmentioning

confidence: 95%

“…According to its patent, the actuator lugs will be compressed into a recess during impact for storing energy, and the stored energy will be returned during the propulsion (Abshire, 2015). Previous study reported an improvement in running economy in highly trained runners when running in this new shoe model, compared with running in a same shoe model without lugs (Moran & Greer, 2013). However, the biomechanical parameters during running in this energy return shoes have not been assessed.…”

Section: Introductionmentioning

confidence: 91%

A new footwear technology to promote non-heelstrike landing and enhance running performance: Fact or fad?

Zhang

McPhail

et al. 2016

Journal of Sports Sciences

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This study sought to compare the kinetics and kinematics data in a group of habitual shod runners when running in traditional running shoes and newly designed minimalist shoes with lug platform. This novel footwear design claims to simulate barefoot running and reduce energy loss during impact. We compared footstrike angle (FSA), vertical average (VALR) and instantaneous (VILR) loading rates, energy loss and initial vertical stiffness between two shoe conditions. Runners demonstrated a decreased FSA while running in minimalist shoes with lug platform than traditional shoes (P = 0.003; Cohen's d = 0.918). However, we did not observe a landing pattern transition. VALR and VILR between two footwear conditions showed no significant difference (P = 0.191-0.258; Cohen's d = 0.304-0.460). Initial vertical stiffness (P = 0.032; Cohen's d = 0.671) and energy loss (P = 0.044; Cohen's d = 0.578) were greater when running in minimalist shoes with lug platform. The results show that minimalist shoes with lug platform reduce the FSA but may not lead to a landing pattern switch or lower vertical loading rates. Interestingly, the new shoe design leads to a greater energy loss than traditional running shoes, which could be explained by a higher initial vertical stiffness.

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Softer and more resilient running shoe cushioning properties enhance running economy

et al. 2014

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Influence of midsole ‘actuator lugs’ on running economy in trained distance runners

Cited by 7 publications

References 24 publications

Acute Effects of Plyometric and Resistance Training on Running Economy in Trained Runners

Acute Effects of Plyometric and Resistance Training on Running Economy in Trained Runners

A new footwear technology to promote non-heelstrike landing and enhance running performance: Fact or fad?

Softer and more resilient running shoe cushioning properties enhance running economy

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