Greater fatigability in knee‐flexors vs. knee‐extensors after a standardized fatiguing protocol

Coratella, Giuseppe; Grosprêtre, Sidney; Gimenez, Philippe; Mourot, Laurent

doi:10.1080/17461391.2018.1469674

Cited by 11 publications

(13 citation statements)

References 48 publications

(99 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The voluntary activation level was calculated using the interpolated twitch technique. At baseline, the interpolated twitch technique was performed eliciting a superimposed doublet with an interpulse duration of 10 ms (100 Hz) (2,22). During this procedure, a stimulating electrode (24 Â 24 mm circle electrode; Spes Medica, Battipaglia (SA), Italy) was positioned above the femoral nerve under the iliopubic ligament, whereas the receiving electrode (40 Â 90 mm rectangular electrode; Spes Medica) was placed 2 cm under the superior posterior iliac spine.…”

Section: Measurementsmentioning

confidence: 99%

“…The neuromuscular factors involved in the force-generating capacity can be further divided into central or peripheral by using the interpolated twitch technique (21). Indeed, through electrical stimulations, it is possible to calculate the voluntary activation and the peak force (pF) recorded after a maximal voluntary contraction as central or peripheral factor, respectively (22). In SM, the central contribution has been identified as a prevalent neuromuscular factor affecting the forcegenerating capacity (8).…”

mentioning

confidence: 99%

See 1 more Smart Citation

Neuromuscular versus Mechanical Stretch-induced Changes in Contralateral versus Ipsilateral Muscle

Cè

Coratella

Bisconti

et al. 2020

Medicine &Amp; Science in Sports &Amp; Exercise

Self Cite

View full text Add to dashboard Cite

Purpose: Whether or not the homologous contralateral muscle (CM) undergoes stretch-induced force reduction as the stretched muscle (SM) is still unclear. The neuromuscular and mechanical factors underlying the force reduction in CM and SM were investigated. Methods: Twenty-one participants underwent unilateral knee extensors passive stretching. In both CM and SM, before, immediately after (POST), 5 (POST 5 ), and 10 min (POST 10 ) after passive stretching, maximum voluntary contraction (MVC), peak force (pF), and voluntary activation (VA) were measured. During MVC, the electromyographic and mechanomyographic root mean square (EMG RMS and MMG RMS, respectively) was calculated in rectus femoris, vastus lateralis, and vastus medialis, together with M-wave. The total electromechanical delay (EMD), divided in time delay (Δt) EMG-MMG and Δt MMG-F was calculated. Results: In CM at POST, the decrease in MVC (−11%; 95% confidence interval [CI], −13 to −9; effect size [ES], −2.27) was accompanied by a fall in VA (−7%; 95% CI, −9 to −4; ES, −2.29), EMG RMS (range, −22% to −11%; ES, −3.92 to −2.25), MMG RMS (range, −10% to −8%; ES, −0.52 to −0.39) and an increase in Δt EMG-MMG (≈+10%; ES, 0.73 to 0.93). All changes returned to baseline at POST 5 . In SM, decrease in MVC (−19%; 95% CI, −24 to −18; ES, −3.08), pF (−25%; 95% CI, −28 to −22; ES, −4.90), VA (−10%; 95% CI, −11 to −9; ES, −5.71), EMG RMS (≈−33%; ES, −5.23 to −3.22) and rise in MMG RMS (range, +25% to +32%; ES, 4.21 to 4.98) and EMD (≈+28%; ES, 1.59 to 1.77) were observed at POST and persisted at POST 10. No change in M-wave occurred. Conclusions: The contralateral central motor drive stretch-induced inhibition seems to account for the force reduction in CM. In SM, both central inhibition and mechanical factors concurred.

show abstract

Section: Measurementsmentioning

confidence: 99%

mentioning

confidence: 99%

Neuromuscular versus Mechanical Stretch-induced Changes in Contralateral versus Ipsilateral Muscle

Cè

Coratella

Bisconti

et al. 2020

Medicine &Amp; Science in Sports &Amp; Exercise

Self Cite

View full text Add to dashboard Cite

show abstract

“…Besides exercise performance, it has been proposed that there is a high probability of muscle injuries (non-contact injuries) after HT (Rahnama et al, 2002) due to decreased muscle temperature during HT (Woods and Bishop, 2007) and from muscle strength deficiency before the commencement of the second half (Yamamoto, 1993;Rahnama et al, 2002). Previous studies have also reported that knee flexors are more fatigable (increased peak joint torque angle and electromyogram activity) than knee extensors and have been associated with hamstring muscle injuries (Coratella et al, 2015(Coratella et al, , 2018.…”

Section: Introductionmentioning

confidence: 99%

A 1-Minute Re-warm Up at High-Intensity Improves Sprint Performance During the Loughborough Intermittent Shuttle Test

et al. 2021

View full text Add to dashboard Cite

Although a 3- to 7-min re-warm up (RW) elicits performance and physiological benefits after half-time (HT), a time-efficient and feasible RW protocol is required for the use of an RW in the athletic setting. This study aimed to investigate the effect of a 1-min RW at high-intensity on the performance and physiological responses during the Loughborough Intermittent Shuttle Test (LIST). In a randomized and counterbalanced cross-over design, 12 male amateur intermittent team sports players (soccer, basketball, handball, and lacrosse; age, 22 ± 2 years; height, 1.70 ± 0.08 m; body mass, 65.1 ± 8.3 kg; body mass index, 22.4 ± 1.9 kg m−2; VO2max, 53.5 ± 4.5 ml kg−1 min−1) performed the LIST. The LIST comprised two 45-min halves separated by a 15-min HT. Each half comprised repetitions of exercise cycles consisting of 3 × 20-m walking, 1 × 20-m maximal sprint, 3 × 20-m jogging, and 3 × 20-m running. During the HT, the participants were assigned to a control trial (CON; 15-min seated rest) or an RW trial (1-min running at 90% of the maximal oxygen uptake after a 14-min seated rest). Compared to the CON, the RW prevents reductions in sprint performance at the fourth and sixth periods of the LIST (fourth: 2.4%, p = 0.002, d = 1.68, sixth: 3.6%, p = 0.012, d = 1.74) and a decrement of gastrointestinal temperature during HT (0.5°C, p = 0.010, d = 1.41). Moreover, the RW decreased the electromyogram amplitude of maximal voluntary contraction (MVC) after HT (12%, p = 0.017, d = 1.12) without a decrease of maximal voluntary contraction force, suggesting an increased neuromuscular efficiency (9%, p = 0.048, d = 0.58). The RW also increased the mean heart rate in the initial part of the second half (4 bpm, p = 0.016, d = 0.38). In conclusion, the RW improved sprint performance, core temperature, muscle activation, and heart rate in the second half of the LIST. The findings suggest that the RW should be recommended for intermittent team sports players when longer RWs are not possible.

show abstract

“…SM-2000N, Interface, Crowthorne, UK). The participants sat on the chair at a hip angle of 80° (0°=full extension) and were secured by two seatbelts 18 . The belts secured the tested limb at 90° of knee flexion (0°=full extension) as used in previous relevant procedures 12 and the untested limb was immobilized by a fixed lever 17 .…”

mentioning

confidence: 99%

“…Before the maximal voluntary contraction assessment, the participants were familiarized with the procedures. Thereafter, they performed a warm-up protocol consisting of 20 1-s to 2-s isometric contractions, separated by 10 s each, starting from a self-selected force and progressively increasing until the maximal volitional force was exerted 18 . After five minutes, the participants were asked if they were ready to start and in case of negative response, more time to recover was provided.…”

mentioning

confidence: 99%

Vastus intermedius muscle architecture predicts the late phase of the knee extension rate of force development in recreationally resistance-trained men

Coratella

Longo

Borrelli

et al. 2020

Journal of Science and Medicine in Sport

Self Cite

View full text Add to dashboard Cite

Greater fatigability in knee‐flexors vs. knee‐extensors after a standardized fatiguing protocol

Cited by 11 publications

References 48 publications

Neuromuscular versus Mechanical Stretch-induced Changes in Contralateral versus Ipsilateral Muscle

Neuromuscular versus Mechanical Stretch-induced Changes in Contralateral versus Ipsilateral Muscle

A 1-Minute Re-warm Up at High-Intensity Improves Sprint Performance During the Loughborough Intermittent Shuttle Test

Vastus intermedius muscle architecture predicts the late phase of the knee extension rate of force development in recreationally resistance-trained men

Contact Info

Product

Resources

About