Muscle activation and knee biomechanics during squatting and lunging after lower extremity fatigue in healthy young women

Longpré, Heather S.; Acker, Stacey M.; Maly, Monica R.

doi:10.1016/j.jelekin.2014.08.013

Cited by 21 publications

(19 citation statements)

References 41 publications

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“…The authors found that it is tiresome for people with lower limbs' OA to fulfill ordinary movements, because joint changes can block transition of potential and kinetic energy of mass centers during walking. Some scientists resume that it is purposeful to develop methods of harmless physical loads for persons with Knee joint OA [34,55,56].…”

mentioning

confidence: 99%

Adaptation of Ruffier’s Test for Assessment of Heart Workability of Students With Health Problems

Drogomeretsky

Kopeikina

Kondakov

et al. 2016

PPS

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Purpose:to check up experimentally adapted test for assessment of heart workability of students with heath problems. Material:in the research girl students and boy students of 18-20 years age (n=487) participated. The procedure of test was as follows: during 45 seconds students fulfilled torso rising from lying on back position. During this procedure pulse was measured three times. Total time of test fulfillment was 2 minutes. For working out the scale for the received results' interpretation we assessed new version of Ruffier's test for validity. For this purpose 487 absolutely healthy tested students fulfilled, first, adapted test. Then, after complete recreation (in 20 minutes) they fulfilled commonly accepted test with squatting. Results:it was found that with the help of adapted test it is possible to objectively assess heart workability of students. Correlation analysis of the received results showed average correlation (r=0.73). Conclusions:application of adapted Ruffier's test permits to assess heart workability of students with health problems.

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mentioning

confidence: 99%

Adaptation of Ruffier’s Test for Assessment of Heart Workability of Students With Health Problems

Drogomeretsky

Kopeikina

Kondakov

et al. 2016

PPS

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“…For both FSL techniques, the subjects were cued to maintain an erect trunk posture while maintaining their arms abducted at 90° with their elbows fully extended. We controlled trunk position as this has been shown to influence kinematics, kinetics, and muscle activity during forward lunge 19 . We instructed each participant to “remain upright throughout each trial” in order to better examine the effect of anterior knee translation on patellar tendon stress.…”

Section: Methodsmentioning

confidence: 99%

“…Most of the previous literature regarding PT rehabilitation exercises has focused on the squat on a decline board,14, 16, 17, 18 which is hypothesized to increase patellar tendon stress by increasing the knee extension moment on a decline board. Longpré et al 19 . reported greater quadriceps muscle activation and a higher internal knee extension moments during lunging vs. squatting.…”

Section: Introductionmentioning

confidence: 97%

Patellar tendon stress between two variations of the forward step lunge

Zellmer

Kernozek

Gheidi

et al. 2019

Journal of Sport and Health Science

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Background Patellar tendinopathy (PT) or “jumper's knee” is generally found in active populations that perform jumping activities. Graded exposure of patellar tendon stress through functional exercise has been demonstrated to be effective for the treatment of PT. However, no studies have compared how anterior knee displacement variations during the commonly performed forward step lunge (FSL) affect patellar tendon stress. Methods Twenty-five subjects (age: 22.69 ± 0.74 years; height: 169.39 ± 6.44 cm; mass: 61.55 ± 9.74 kg) performed 2 variations of an FSL with the anterior knee motion going in front of the toes (FSL-FT) and the knee remaining behind the toes (FSL-BT). Kinematic and kinetic data were used with an inverse-dynamics based static optimization technique to estimate individual muscle forces to determine patellar tendon stress during both lunge techniques. A repeated measures multivariate analysis was used to analyze these data. Results The peak patellar tendon stress, stress impulse, quadriceps force, knee moment, knee flexion, and ankle dorsiflexion angle were significantly greater ( p < 0.001) during the FSL-FT as compared to the FSL-BT. The peak patellar tendon stress rate did not differ between the FSL-FT and FSL-BT. Conclusion The use of an FSL-FT as compared to an FSL-BT increased the load and stress on the patellar tendon. Because a graded exposure of patellar tendon loading with other closed kinetic chain exercises has proven to be effective in treating PT, consideration for the prescription of variations of the FSL and further clinical evaluation of this exercise is warranted in individuals with PT.

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“…Participants were trained and familiarized with the back squat, and their muscles accustomed to the isometric contraction regimen. The difference in adductor scores between conditions can be explained by the role of these muscles during back squat repetitions [87]. During the concentric phase of a back squat, hip adduction and internal rotation assist the hip extension [88].…”

Section: Plos Onementioning

confidence: 99%

Evaluating the effects of embedded self-massage practice on strength performance: A randomized crossover pilot trial

2021

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Background Self-administered massage interventions with a roller massager are commonly used as part of warm-ups and post-workout recovery routines. There is yet no clear consensus regarding the practical guidelines for efficient embedded interventions. Objectives The present randomized crossover pilot trial aimed at examining the effects of a rolling intervention with a roller massager embedded within the rests periods of a resistance training protocol. The rolling intervention targeted quadriceps muscles. Setting Participants (n = 14) performed two resistance training protocols expected to elicit momentary muscle failure. The protocol consisted in 10 sets of 10 rest-pause repetitions of back squats, with a poundage set up at 50% of the maximal one-repetition. Two min were allocated to recovery between sets. During the recovery periods, participants completed a rolling routine with a roller massager for 60 s (Roller-massager), or underwent passive recovery (Control). The total workload, concentric power, thigh circumference rate of perceived exertion (RPE) and delayed onset of muscle soreness (DOMS) from 24 h to 120 h after completion of the protocol were the dependent variables. Results Roller-massager was associated with a reduction in total workload (-11.6%), concentric power (-5.1%) and an increase in perceived exertion compared to Control (p < 0.05). Roller-massager was also associated with reduced thigh circumference after the resistance training protocol, indicating reduced muscle swelling, and reduced DOMS 24 h to 120 h post-workout (p < 0.001). Conclusion These findings support that embedded rolling with a roller massager hinders performance and increases effort perception. Embedded interventions may not be suitable during conditioning periods designed to maximize training intensity.

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Muscle activation and knee biomechanics during squatting and lunging after lower extremity fatigue in healthy young women

Cited by 21 publications

References 41 publications

Adaptation of Ruffier’s Test for Assessment of Heart Workability of Students With Health Problems

Adaptation of Ruffier’s Test for Assessment of Heart Workability of Students With Health Problems

Patellar tendon stress between two variations of the forward step lunge

Evaluating the effects of embedded self-massage practice on strength performance: A randomized crossover pilot trial

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