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Six Weeks Habituation of Simulated Barefoot Running Induces Neuromuscular Adaptations and Changes in Foot Strike Patterns in Female Runners.

Khowailed IA, Petrofsky J, Lohman E, Daher N - Med. Sci. Monit. (2015)

Bottom Line: Six weeks of SBR was associated with a significant decrease in the loading rates and impact forces.Additionally, SBR significantly decrease the stride length, step duration, and flight time, and stride frequency was significantly higher compared to shod running.Non-habituation SBR did not show a significant neuromuscular adaptation in the EMG activity of TA and GAS as manifested after 6 weeks of habituated SBR.

View Article: PubMed Central - PubMed

Affiliation: Department of Physical Therapy, College of Health and Human Services, Touro University, Henderson, NV, USA.

ABSTRACT

Background: The aim of this study was to examine the effects of a 6-week training program of simulated barefoot running (SBR) on running kinetics in habitually shod (wearing shoes) female recreational runners.

Material and methods: Twelve female runners age 25.7 ± 3.4 years gradually increased running distance in Vibram FiveFingers minimal shoes over a 6-week period. The kinetic analysis of treadmill running at 10 Km/h was performed pre- and post-intervention in shod running, non-habituated SBR, and habituated SBR conditions. Spatiotemporal parameters, ground reaction force components, and electromyography (EMG) were measured in all conditions.

Results: Post-intervention data indicated a significant decrease across time in the habituation SBR for EMG activity of the tibialis anterior (TA) in the pre-activation and absorptive phase of running (P<0.001). A significant increase was denoted in the pre-activation amplitude of the gastrocnemius (GAS) between the shod running, unhabituated SBR, and habituated SBR. Six weeks of SBR was associated with a significant decrease in the loading rates and impact forces. Additionally, SBR significantly decrease the stride length, step duration, and flight time, and stride frequency was significantly higher compared to shod running.

Conclusions: The findings of this study indicate that changes in motor patterns in previously habitually shod runners are possible and can be accomplished within 6 weeks. Non-habituation SBR did not show a significant neuromuscular adaptation in the EMG activity of TA and GAS as manifested after 6 weeks of habituated SBR.

No MeSH data available.


Related in: MedlinePlus

Average vertical loading rate (AVLR) and instantaneous vertical loading rate (IVLR) during pre-intervention shod running and post-intervention 6 weeks of simulated barefoot running (SBR).
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f4-medscimonit-21-2021: Average vertical loading rate (AVLR) and instantaneous vertical loading rate (IVLR) during pre-intervention shod running and post-intervention 6 weeks of simulated barefoot running (SBR).

Mentions: A comparison of the pre-intervention and post-intervention results revealed that both VALR and VILR were significantly reduced during habituated SBR running compared to shod running. The rate of loading is calculated as 20–80% of the impact transient (when present) or to (3–12%) of stance phase when impact transient is absent [34]. The average vertical loading rate for habituated SBR runners was (24.27±4.09) body weights per second, which was significantly lower than that of shod runners (38.33±5.01, P<0.001) (Table 4, Figure 4). Magnitude of impact force was significantly lower during SBR running compared to shod running. The impact force was 0.60±0.14 body weight in barefoot runners, which was significantly lower than the 1.39±0.47 (P<0.001) body weight in shod runners (Table 4).


Six Weeks Habituation of Simulated Barefoot Running Induces Neuromuscular Adaptations and Changes in Foot Strike Patterns in Female Runners.

Khowailed IA, Petrofsky J, Lohman E, Daher N - Med. Sci. Monit. (2015)

Average vertical loading rate (AVLR) and instantaneous vertical loading rate (IVLR) during pre-intervention shod running and post-intervention 6 weeks of simulated barefoot running (SBR).
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4514266&req=5

f4-medscimonit-21-2021: Average vertical loading rate (AVLR) and instantaneous vertical loading rate (IVLR) during pre-intervention shod running and post-intervention 6 weeks of simulated barefoot running (SBR).
Mentions: A comparison of the pre-intervention and post-intervention results revealed that both VALR and VILR were significantly reduced during habituated SBR running compared to shod running. The rate of loading is calculated as 20–80% of the impact transient (when present) or to (3–12%) of stance phase when impact transient is absent [34]. The average vertical loading rate for habituated SBR runners was (24.27±4.09) body weights per second, which was significantly lower than that of shod runners (38.33±5.01, P<0.001) (Table 4, Figure 4). Magnitude of impact force was significantly lower during SBR running compared to shod running. The impact force was 0.60±0.14 body weight in barefoot runners, which was significantly lower than the 1.39±0.47 (P<0.001) body weight in shod runners (Table 4).

Bottom Line: Six weeks of SBR was associated with a significant decrease in the loading rates and impact forces.Additionally, SBR significantly decrease the stride length, step duration, and flight time, and stride frequency was significantly higher compared to shod running.Non-habituation SBR did not show a significant neuromuscular adaptation in the EMG activity of TA and GAS as manifested after 6 weeks of habituated SBR.

View Article: PubMed Central - PubMed

Affiliation: Department of Physical Therapy, College of Health and Human Services, Touro University, Henderson, NV, USA.

ABSTRACT

Background: The aim of this study was to examine the effects of a 6-week training program of simulated barefoot running (SBR) on running kinetics in habitually shod (wearing shoes) female recreational runners.

Material and methods: Twelve female runners age 25.7 ± 3.4 years gradually increased running distance in Vibram FiveFingers minimal shoes over a 6-week period. The kinetic analysis of treadmill running at 10 Km/h was performed pre- and post-intervention in shod running, non-habituated SBR, and habituated SBR conditions. Spatiotemporal parameters, ground reaction force components, and electromyography (EMG) were measured in all conditions.

Results: Post-intervention data indicated a significant decrease across time in the habituation SBR for EMG activity of the tibialis anterior (TA) in the pre-activation and absorptive phase of running (P<0.001). A significant increase was denoted in the pre-activation amplitude of the gastrocnemius (GAS) between the shod running, unhabituated SBR, and habituated SBR. Six weeks of SBR was associated with a significant decrease in the loading rates and impact forces. Additionally, SBR significantly decrease the stride length, step duration, and flight time, and stride frequency was significantly higher compared to shod running.

Conclusions: The findings of this study indicate that changes in motor patterns in previously habitually shod runners are possible and can be accomplished within 6 weeks. Non-habituation SBR did not show a significant neuromuscular adaptation in the EMG activity of TA and GAS as manifested after 6 weeks of habituated SBR.

No MeSH data available.


Related in: MedlinePlus