Shod vs. Barefoot Effects on Force and Power Development During a Conventional Deadlift
Mark E Hammer1, Rudi A Meir, John W Whitting
1School of Health and Human Sciences, Southern Cross University, Lismore, New South Wales, Australia.
Journal of Strength and Conditioning Research
|October 11, 2017
Summary
Lifting in the conventional deadlift with unshod footwear may slightly improve rate of force development and center of pressure control. However, current evidence is limited, suggesting more research is needed to confirm benefits for lifters.
Area of Science:
- Biomechanics
- Strength and Conditioning
Background:
- Footwear can influence force and power production during resistance exercises.
- Understanding the biomechanical differences between shod and unshod lifting is crucial for optimizing performance and technique.
Purpose of the Study:
- To compare the effects of shod versus unshod footwear on force and power development during the conventional deadlift.
- To analyze key kinetic variables, including force, rate of force development, and center of pressure changes.
Main Methods:
- A counterbalanced, cross-over design was employed with 10 male participants performing conventional deadlifts at 60% and 80% of their 1-repetition maximum (1RM).
- Kinetic data, including peak force, rate of force development, time to peak force, center of pressure excursion, and peak power, were recorded for both shod and unshod conditions.
- Participants completed four sets of four repetitions per session, with two sets per footwear condition and one set per load.
Main Results:
- Unshod lifting showed a statistically significant, albeit small, increase in the rate of force development (RFD) and mediolateral center of pressure (ML-COP) excursion compared to shod lifting.
- Significant main effects of load were observed for peak vertical force (PF), anterior-posterior center of pressure (COP-AP) excursion, and time to peak force (TPF).
- No significant interactions were found between footwear condition, load, and testing session.
Conclusions:
- While unshod conventional deadlifts may offer marginal benefits in RFD and ML-COP, the evidence is currently limited.
- Further research is necessary to fully elucidate the implications and potential advantages of unshod lifting for conventional deadlifts.
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