Effects of a Competitive Soccer Match on Jump Performance and Interlimb Asymmetries in Elite Academy Soccer Players

Bromley, Tom; Turner, Anthony N.; Read, Paul; Lake, Jason P.; Maloney, Sean J.; Chavda, Shyam; Bishop, Chris

doi:10.1519/jsc.0000000000002951

Cited by 28 publications

(75 citation statements)

References 44 publications

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“…By comparing the magnitude of inter-limb asymmetry between the rested and fatigued state for each test, we found that the asymmetry increased post fatigue in triple-hop distance. Most of previous studies have reported similar ndings: the inter-limb asymmetry in unilateral CMJ height increased post fatigue among active male adults (aged 28.9 ± 5.1 years) [9] and elite adolescent male soccer athletes (aged 17.6 ± 0.5 years) [15]; the inter-limb asymmetry in peak force, peak power, and mean power during the unilateral CMJ increased post fatigue among male Judo athletes (aged 22.5 ± 3.6 years) [16]. Collectively, these ndings indicate that fatigue ampli es the inter-limb asymmetry in leg power, suggesting the necessity of assessing the inter-limb asymmetry at both the nonfatigued and fatigued state.…”

Section: Discussionsupporting

confidence: 61%

“…The unilateral jump testing has been widely used to assess the interlimb asymmetry in lower-limb power as the single-leg jumping movement is common in sports and the assessment is time-e cient [9]. Previous ndings showed that the inter-limb asymmetry in single-leg countermovement jump (CMJ) performance increased post fatigue among adolescents and adults [9,15,16]. In addition to the unilateral jump performance, the Star Excursion Balance Test (SEBT) and its modi ed version (Y Balance Test) have been widely used to examine inter-limb asymmetry in dynamic balance and neuromuscular control.…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Fatigue on Asymmetry Between Lower Limbs in Functional Performances in Elite Child Taekwondo Athletes

Guan

Bredin

Jiang

et al. 2020

Preprint

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Background: Inter-limb asymmetry above a certain threshold in functional performance indicates increased injury risk in sports. Fatigue has been found to increase bilateral asymmetry in lower-limb jumping performance among high-school and adult athletes, whereas this impact has not been examined for child athletes. Methods: Performance of single-leg jumps, Star Excursion Balance Test (SEBT), and muscle (hamstring and gastrocnemius) flexibility were measured for 13 elite male child Taekwondo athletes (aged 9.85 ± 0.80 years) at both the rested and fatigued states to examine the inter-limb asymmetry. A two-way repeated measures ANOVA was conducted to examine for difference for each test and the interaction between limb (dominant, non-dominant leg) and state (rested, fatigued state). Paired t test or Wilcoxon Signed-Rank test was used to compare the asymmetry magnitude at the rested vs. fatigued state for each test, and the variation in performance post fatigue in the dominant vs. non-dominant leg when appropriate. Results: The inter-limb asymmetry in triple-hop distance significantly (p = 0.046) increased with fatigue, whereas the asymmetry significantly (p = 0.004) decreased with fatigue in anterior (ANT) reach distance in SEBT. A significant (p = 0.027) limb by state interaction was shown for posterolateral (PL) reach distance in SEBT, wherein a significant (p = 0.005) bilateral difference was only shown at the rested state. The PL reach distance showed a significantly greater decrease (p = 0.028) post fatigue when using the dominant leg for support compared to using the non-dominant leg.Conclusion: Fatigue significantly impacts inter-limb asymmetry in jump performances and dynamic balance for child athletes, while the variation in inter-limb asymmetry post fatigue may be different across tests. For the purpose of injury prevention, practitioners should consider assessing the inter-limb asymmetry for children at both the rested and fatigued state, and be mindful of the fatigue response of each leg in functional tests.

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Section: Discussionsupporting

confidence: 61%

Section: Introductionmentioning

confidence: 99%

The Effect of Fatigue on Asymmetry Between Lower Limbs in Functional Performances in Elite Child Taekwondo Athletes

Guan

Bredin

Jiang

et al. 2020

Preprint

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“…The studies used different designs. A differentiation can be made between studies regarding inter-limb asymmetries during a loading protocol [20,21,[30][31][32][33][34] (Table 3) and studies regarding inter-limb asymmetries with a supplementary task in a pre-post design [7,16,[35][36][37][38] (Table 4). In six studies, the subjects were tested for asymmetries at different points of time during the loading protocol [20,21,[31][32][33][34].…”

Section: Methodsmentioning

confidence: 99%

“…In six studies, the subjects were tested for asymmetries at different points of time during the loading protocol [20,21,[31][32][33][34]. One study interspersed the loading protocol with several single-leg countermovement jumps (SLCMJ) to test asymmetries [30], and six studies used other tasks/procedures, such as jumps, isokinetic strength testing or a gait analysis, to test the subjects before and after the loading protocol [7,16,[35][36][37][38]. Furthermore, all studies investigated the acute influence of exercise-induced fatigue on inter-limb asymmetries.…”

Section: Methodsmentioning

confidence: 99%

“…of one limb in relation to the other. In sports, inter-limb asymmetries might be functionally induced as a consequence of the sporting activity [13][14][15], especially in sports that are mainly characterized by asymmetric (or unilateral) execution of movements with the preferred limb such as kicking in soccer or throwing in handball [16]. However, also in symmetric sports that are characterized by cyclic or alternating movement patterns (e.g., running, cycling, or swimming), inter-limb asymmetries occur [13,15,17].…”

Section: Introductionmentioning

confidence: 99%

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The Influence of Exercise-Induced Fatigue on Inter-Limb Asymmetries: a Systematic Review

2020

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Background Non-contact injuries such as anterior cruciate ligament ruptures often occur during physical load toward the end of a match. This is ascribed to emerging processes due to exercise-induced fatigue. Moreover, non-contact injuries often occur during dynamic actions such as landing or cutting movements. Inter-limb asymmetries are suggested as one possible cause for those injuries based on findings indicating that asymmetries between limbs are associated with a higher injury risk. Hence, assessing inter-limb asymmetry during physical load in the condition of exercise-induced fatigue is warranted to identify potentially relevant precursors for non-contact injuries. Objective The objective of this study was to overview the current state of evidence concerning the influence of exercise-induced fatigue on inter-limb asymmetries through a systematic review. Methods A systematic literature search was conducted using the databases Web of Science, Scopus, PubMed, SURF, and SPONET to identify studies that assessed inter-limb asymmetries of healthy people, calculated with an asymmetry equation, before and after, or during a loading protocol. Results Thirteen studies were included in the systematic review. The loading protocols involved running, race walking, jumping, squatting, soccer, rowing, and combinations of different exercises. Moreover, different tasks/procedures were used to assess inter-limb asymmetries, e.g., squats, single-leg countermovement jumps, gait analysis, or isokinetic strength testing. The results seem to depend on the implemented loading protocol, the tasks/procedures, and the measured parameters. Conclusions Future research needs more systematization and consistency, assessing the effect of exercise-induced fatigue on inter-limb asymmetries. Moreover, the emergence of inter-limb asymmetries should be regarded in the context of sport-specific movements/tasks. Testing before, after, and during a physical loading protocol is advisable to consider the influence of exercise-induced fatigue on sport-specific tasks and to identify the possible mechanisms underlying load-dependent inter-limb asymmetries with regard to risk of non-contact injury.

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Relationship between lower limb asymmetry and judo-specific test performance

et al. 2019

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Effects of a Competitive Soccer Match on Jump Performance and Interlimb Asymmetries in Elite Academy Soccer Players

Cited by 28 publications

References 44 publications

The Effect of Fatigue on Asymmetry Between Lower Limbs in Functional Performances in Elite Child Taekwondo Athletes

The Effect of Fatigue on Asymmetry Between Lower Limbs in Functional Performances in Elite Child Taekwondo Athletes

The Influence of Exercise-Induced Fatigue on Inter-Limb Asymmetries: a Systematic Review

Relationship between lower limb asymmetry and judo-specific test performance

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