Therefore, the purpose of this study was to investigate the potential effect of glutamine supplementation on surface electromyographic activity and levels of CK after an
eccentric contraction.
Eccentric Movement--In an
eccentric contraction the muscle lengthens and develops tension to guide the movement and to stop it.
The
eccentric contraction of non-dominant rectus abdominis followed by concentric contraction during the cocking phase of the serve motion is related as a specific tear injury mechanism (Maquirriain et al.
The few maximal
eccentric contractions resulted in attenuation of symptoms or markers of muscle injury when a higher amount of eccentric muscle work was performed 3 wks later.
Predominantly concentric contractions (running uphill), seem to be the most efficient way of increasing the HSP70 concentrations in the different tissues, followed by
eccentric contraction (downhill) and lastly the concentric-eccentric cycle (horizontal).
It has also been documented that hamstrings are more responsive than knee extensors to the damaging effects of an exercise bout composed of maximal voluntary
eccentric contractions (Croisier at al.
Moreover, a study with mice (Widrick and Baker, 2006) reported decreased power in an isolated muscle after an
eccentric contraction series due to a loss in strength and a slower muscle shortening speed.
8) PT/BW, Peak torque/Body weight; Work/BW, Work/Body weight; conc, concentric contraction; ecc,
eccentric contraction * Indicates significant difference between patellar tendinopathy and control groups (p < 0.
The low plasma CK response of the present study may reflect a limited
eccentric contraction component of the ER and NM exercise bouts.
2,4,7) IT injuries are often seen with sudden, aggressive lengthening of the hamstring muscles, whereas injuries to the ASIS and AIIS are the result of abrupt
eccentric contraction of hip extensor muscles while the knee is flexed.
Concentric contraction causes shortening while
eccentric contraction causes the lengthening of muscle as it exerts tension against the external load to move the bony lever.
2] probably because
eccentric contraction was performed in only one exercise movement and one muscle group (ECC knee extension of quadriceps muscle).
