Eccentric Fatigue Modulates Stretch-shortening Cycle Effectiveness – A Possible Role in Lower Limb Overuse Injuries

Debenham, James; Travers, Mervyn; Gibson, William; Campbell, Amity; Allison, Garry

doi:10.1055/s-0035-1549923

Cited by 11 publications

(12 citation statements)

References 47 publications

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“…Repetitive contractile activity, such as during running, induces muscle fatigue characterized by a reduction in the force-generating capacity and slowing of the muscle [17,18]. Muscle fatigue of the foot and ankle muscles during running is associated with changes in foot roll-over and ankle movement kinematics [7,17] that will lead to suboptimal running mechanics [19]. Indeed, it has been observed that foot muscle fatigue shifted the dynamic plantar pressure to the medial forefoot (MF) [7,8], reflecting excessive pronation.…”

Section: Dynamic Plantar Pressure Distributionmentioning

confidence: 99%

Obesity and foot muscle strength are associated with high dynamic plantar pressure during running

et al. 2020

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Obese people are often encouraged to lose body mass by exercise. The aim of the study was to determine the effect of body mass and ankle muscle strength on the dynamic foot-pressure distribution before and after running. Twenty-five normal weight (72.0 ± 5.3 kg), 25 overweight (80.8 ± 5.6 kg) and 25 obese (96.8 ± 6.5 kg) age-and height-matched male recreational runners joined the study. Before and after 30 min running, dynamic foot-pressure distribution during running, and ankle plantarflexor, dorsiflexor, invertor and evertor muscle strength were measured using a foot-scan pressure-plate and isokinetic dynamometer, respectively. Body mass index and percentage fat mass correlated positively to almost all components of foot-pressure distribution; this explantion was extracted from 14% (for toe 1) to 52% (for dynamic arch index) of peak foot pressure and between 21% (for metatarsal 1) to 48% (for midfoot) of the impulse underneath different foot zones. Only plantarflexor muscle strength significantly predicted plantar pressure and impulse underneath the T1, T2-5, midfoot area and the dynamic arch index. After running, plantarflexor and invertor muscle strength predicted from 30% (for metatarsal 2) to 58% (for metatarsal 1) of peak foot-pressure and impulse underneath the different foot zones. Obesity is associated with excessive plantar loading that is aggravated after running by fatigue-related reductions in plantar flexor and invertor muscle strength. To prevent foot pain and injuries related to excessive foot pressures, at the start of the weight control process non-weight bearing rather than weight-bearing exercise is advisable.

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Section: Dynamic Plantar Pressure Distributionmentioning

confidence: 99%

Obesity and foot muscle strength are associated with high dynamic plantar pressure during running

et al. 2020

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“…Indeed, a recent systematic review on this topic revealed that jump performance is impaired 72 h post-match while sprinting performance seems to recover at this time (Silva et al, 2018 ). Neuromuscular fatigue results in decreased force-production capacity concurrent with impairments in the muscle-stretch-shortening cycle (SSC), which are relevant issues for injury prevention and soccer performance maintenance perspectives (Debenham et al, 2015 ). Furthermore, regarding the recovery process after training and competition, the high between-subjects and between-weeks variations that might be present in a soccer team must be considered (Nédélec et al, 2012 ).…”

Section: Introductionmentioning

confidence: 99%

Weekly Variations of Short-Duration Maximal Jumping Performance in Soccer Players: Exploring Relationships With Accumulated Training Load and Match Demands

et al. 2021

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Purpose: The aim of this study was 2-fold: (1) to analyze variations of short-duration maximal jumping performance in players exposed to a match and those who were not and (2) to analyze the relationships between changes in the short-duration maximal jumping performance and different accumulated training load and match demands measures.Methods: Twenty-four professional soccer players (age: 20.3 ± 1.7 years) were monitored daily for their training load and match demands over 6 weeks. In addition, they performed a weekly short-duration maximal jumping performance test (72 h after the last match).Results: Negative moderate correlations were found between percentage of change of countermovement jump (CMJ) height and Acummulated training load (ATL) of total distance (TD), high metabolic load (HML), accelerations (ACC), and decelerations (DEC) (r = −0.38, p = 0.004; r = −0.33, p = 0.013; r = −0.39, p = 0.003; and r = −0.30, p = 0.026). No correlations were found for match load (ML). TD, HML, ACC, and DCC (r = 0.27, r = 0.25, r = 0.31, and r = 0.22, respectively) were used to predict the percentage of change of CMJ height.Conclusion: Match participation has negative effects on CMJ performance. The ATL of HML, ACC, DCC, and TD have a significant influence on both CMJ measures changes. Also, the ATL values of those metrics are the best predictors of the percentage changes of CMJ performance.

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“…As mentioned earlier, this lower change in jump assessments might be due to the lack of stimuli for running itself, which could make it impossible to improve jump performance. However, the moderate inverse correlation between sRPE and jumping could be caused by chronic fatigue [50]. In fact, a previous study analyzed the associations between perceived loads and physical fitness in 19 professional soccer players over nine weeks of training and competition [51].…”

Section: Discussionmentioning

confidence: 99%

Variations of Trail Runner’s Fitness Measures across a Season and Relationships with Workload

et al. 2021

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Trail running involves off-road running over different surfaces of positive and negative unevenness. Given these particularities and the associated physical demands, it is essential to understand this relationship and how fitness levels influence performance. This study aimed to analyze fitness level variations during different times of the season and establish a relationship between changes in fitness levels and accumulated load. Twenty-five trail running athletes (age: 36.23 ± 8.30 years) were monitored over 52 weeks. Three periods of assessment were implemented, while load between those periods was calculated. Athletes were monitored daily by global positioning systems. The collected data included distance covered, duration, and rate of perceived exertion (RPE), which were used to obtain session-RPE. Additionally, maximal aerobic speed, vertical jump, and dynamic balance were tested periodically. Moderate inverse correlations were found between assessment 1 and 2 for total sRPE and vertical jump: countermovement jump (VJ: CMJ) (r = −0.349), and Y balance test: left posterolateral (YBT: LPL) (r = −0.494). Similar correlations were found between assessment 2 and 3 for total sRPE and VJ: CMJ (r = −0.397), and vertical jump: drop jump (VJ: DJ) (r = −0.395). The results suggest that trail running coaches should monitor and assess dose–response relationships and possible anterior asymmetries of dynamic balance performance.

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Eccentric Fatigue Modulates Stretch-shortening Cycle Effectiveness – A Possible Role in Lower Limb Overuse Injuries

Cited by 11 publications

References 47 publications

Obesity and foot muscle strength are associated with high dynamic plantar pressure during running

Obesity and foot muscle strength are associated with high dynamic plantar pressure during running

Weekly Variations of Short-Duration Maximal Jumping Performance in Soccer Players: Exploring Relationships With Accumulated Training Load and Match Demands

Variations of Trail Runner’s Fitness Measures across a Season and Relationships with Workload

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