Impact of Fatigue on Gender-Based High-Risk Landing Strategies

McLean, Scott; Felin, Rebecca E.; Suedekum, Natalie A.; Calabrese, Gary J.; Passerallo, Allen J.; Joy, Susan M.

doi:10.1249/mss.0b013e3180d47f0

Cited by 277 publications

(371 citation statements)

References 48 publications

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“…6 Female athletes have repeatedly demonstrated a landing pattern characterized by decreased knee flexion and increased knee valgus, with greater relative vertical ground reaction force and external knee abduction moment in comparison to their male counterparts. 9,15,17,29 Utilization of such a landing pattern has been identified as a factor increasing the risk of ACL injury in female athletes. 8 Neuromuscular deficits such as muscle weakness or impaired muscle coordination have been identified as substantial and potentially modifiable risk factors related to the gender bias in ACL injury rate.…”

Section: Muscle Strength In the Lower Extremity Does Not Predict Postmentioning

confidence: 99%

Muscle Strength in the Lower Extremity Does Not Predict Postinstruction Improvements in the Landing Patterns of Female Athletes

Mizner

Kawaguchi

Chmielewski

2008

J Orthop Sports Phys Ther

112

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Section: Muscle Strength In the Lower Extremity Does Not Predict Postmentioning

confidence: 99%

Muscle Strength in the Lower Extremity Does Not Predict Postinstruction Improvements in the Landing Patterns of Female Athletes

Mizner

Kawaguchi

Chmielewski

2008

J Orthop Sports Phys Ther

112

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“…Repeated SSC exercise performed over a prolonged period of time is likely to lead to modified musculotendon unit behaviour, altered stiffness regulation, impaired function and reduced dynamic knee stability (McLean et al 2007;Nicol et al 2006). Fatigue during soccer has been associated with increased injury risk in adult (Hawkins et al 2001) and youth football (Price et al 2004).…”

Section: Introductionmentioning

confidence: 99%

Altered neuromuscular control of leg stiffness following soccer-specific exercise

et al. 2014

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2 AbstractPurpose: To examine changes to neuromuscular control of leg stiffness following 42-min of soccer-specific exercise. Methods: Ten youth soccer players aged 15.8  0.4 hopped on a force plate at a self selected frequency before and after simulated soccer exercise performed on a non-motorised treadmill. During hopping muscle activity was measured using surface EMG from four lower limb muscles and analysed to determine feedforward and feedback mediated activity, as well as co-contraction. Results: There was no change in stiffness following the soccer-specific exercise (26.6  10.6 versus 24.0  7.0 kN·m -1 , p > 0.05), with half the group increasing and half decreasing their stiffness. Changes in stiffness were significantly related to changes in CoM displacement (r = 0.90, p < 0.01) but not changes in peak GRF (r = 0.58, p > 0.05). A number of significant relationships were observed between changes in stiffness and CoM displacement with changes in feedforward, feedback and eccentric muscle activity of the soleus and vastus lateralis muscles following the soccer exercise (r = 0.64-0.98, p < 0.05), but not with changes in co-contraction around the knee and ankle (r = 0.11-0.55, p > 0.05). Conclusions:Following soccer-specific exercise individual changes in extensor muscle activity modulate changes in CoM displacement and leg stiffness. Individuals who reduce preactivation, braking activity and consequently leg stiffness with fatigue may be at a greater risk of injury.

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“…That is, there is common agreement that the dissociation of lactic acid into lactate and a proton (H) is responsible for muscular acidosis during high-intensity exercise, which causes muscular fatigue and performance level decline 8) . Muscular fatigue can change muscle recruitment during a Taekwondo front kick and cause injury during a match 9) , and it is one of the many factors affecting lower limb dynamic joint stability during athletic tasks 10) . Therefore, the ability to rapidly remove accumulated lactic acid during the one-minute break of a Taekwondo match is considered an important factor in muscle recovery from fatigue, that can enhance performance, and reduce the risk of injury.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Electrical Stimulation on Blood Lactate after Anaerobic Muscle Fatigue Induced in Taekwondo Athletes

et al. 2011

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Abstract.[Purpose] The aim of this study was to determine the effect of electrical stimulation on blood lactate after anaerobic muscle fatigue was induced in Taekwondo athletes.[Subjects] Twenty-four male collegiate Taekwondo athletes voluntarily participated in this study (from June 7, 2010 to June 18, 2010, a total of 2 weeks). Subjects were randomly divided into three groups of 8: a) Electrical stimulation group (ES) which received electrical muscle stimulation; b) the massage group which received massage; and the control group which took a rest after induction of anaerobic muscle fatigue. [Methods] This study was a double-blind randomized controlled trial. It was conducted at the sports science research laboratory of Kyungwoon University, Gumi, Korea. Muscle fatigue was induced via anaerobic exercise. Blood samples were collected when the athletes were in a relaxed state, immediately after anaerobic exercise, 15 minutes after anaerobic exercise, and 25 minutes after anaerobic exercise.[Results] Repeated measures ANOVA showed statistically significant differences in lactic acid concentration in the blood with time in the three groups, as well as among the three groups. The lactic acid concentrations in the blood was highest immediately after exercise, decreased significantly 15 min after exercise, and further decreased 25 min after exercise. Scheffe's post-hoc test revealed statistically significant differences between the massage group and the control group, and between the ES group and the control group, whereas no statistically significant difference was found between the massage group and the ES group. [Conclusion] Electrical stimulation was shown to enhance muscle fatigue recovery caused by anaerobic exercise by Taekwondo athletes.

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Impact of Fatigue on Gender-Based High-Risk Landing Strategies

Cited by 277 publications

References 48 publications

Muscle Strength in the Lower Extremity Does Not Predict Postinstruction Improvements in the Landing Patterns of Female Athletes

Muscle Strength in the Lower Extremity Does Not Predict Postinstruction Improvements in the Landing Patterns of Female Athletes

Altered neuromuscular control of leg stiffness following soccer-specific exercise

The Effect of Electrical Stimulation on Blood Lactate after Anaerobic Muscle Fatigue Induced in Taekwondo Athletes

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