EMG Activity of Lower Limb Muscles during Anti-Gravity Treadmill Running with Different Loads and Speeds

Author:

Pietraszewski Przemysław1ORCID,Gołaś Artur1ORCID,Roczniok Robert1ORCID,Gepfert Mariola1,Zając Adam1ORCID

Affiliation:

1. Institute of Sport Sciences, The Jerzy Kukuczka Academy of Physical Education in Katowice, 40-065 Katowice, Poland

Abstract

The study’s objective was to identify the features of internal movement structure that depend on speed and the importance of unloading when jogging on an anti-gravity treadmill. The aim was to investigate whether the internal structure of running changes under unloaded conditions, using an anti-gravity treadmill. Twenty male competitive middle- and long-distance runners with the following characteristics participated in the study: age, 25 ± 5 years; body weight, 67.2 ± 8.9 kg; body height, 177 ± 11 cm; and training experience, 9 ± 5 years. The gastrocnemius (GC), tibialis anterior (T), quadriceps femoris (Q), biceps femoris (B), and gluteus (G) were the five lower limb muscles whose muscle activity was evaluated. Surface electromyography (sEMG) was used to measure muscle activation while jogging and running on the AlterG Anti-Gravity Treadmill. The study method involved capturing the examined muscular activity at four different speeds: 6, 10, 14, and 18 km/h. At each of these speeds, four two-minute measurements were taken with varying body weight relief: 100%, 75%, 50%, and 25% of body weight. Repeated measures multivariate analysis of variance (RM-MANOVA) [F = 3.4663 p = 0.0001] showed that as running speed increases, the muscular activity of each muscle, expressed as a percentage of maximum muscle tension (%MVIC), decreases significantly. Results indicate that running pace affects the dynamics of the reduction in muscle activity in every examined muscle. As one runs faster, the decline in dynamics becomes more intense. At the slowest jogging pace (6 km/h), the variations were almost negligible (±4 percentage points between 25% and 100% body weight relief) as unloading increased. However, the discrepancies reached up to 14 percentage points at the fastest running speed (18 km/h). In every muscle studied, distinctive patterns and significant dynamics at high speeds were observed. The study’s findings suggest that using an anti-gravity treadmill for training can be beneficial, yet it is important to consider the significant relationships between speed and relief, as these variables could impact maintaining a proper movement pattern and running style. This knowledge may be useful when choosing the right training regimens and loads for runners recovering from injuries.

Publisher

MDPI AG

Reference36 articles.

1. Adolescent track and field injuries presenting to US emergency departments;Hopkins;Physician Sportsmed.,2024

2. Current iliotibial band syndrome alters patterns of running coordination in male and female runners, but not their levels of coordination variability;Veiga;Sports Biomech.,2024

3. Running-Related Injury Incidence: Does It Correlate with Kinematic Sub-groups of Runners? A Scoping Review;Adamson;Sports Med.,2024

4. Lee, J.H., and Kim, E.J. (2024). Optimizing rehabilitation outcomes for stroke survivors: The impact of speed and slope adjustments in anti-gravity treadmill training. Medicina, 60.

5. Evaluation of lower extremity overuse injury potential in runners;Hreljac;Med. Sci. Sports Exerc.,2000

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