Publication_ biomechanics of the knee during closed kinetic chain and open kinetic chain exercises

Although closed (CKCE) and open (OKCE) kinetic chain exercises are used in athletic training and clinical environments, few studies have compared knee joint biomechanics while these exercises are performed dynamically. 3 best diets The purpose of this study was to quantify knee forces and muscle activity in CKCE (squat and leg press) and OKCE (knee extension).

Ten male subjects performed three repetitions of each exercise at their 12-repetition maximum. Paleohacks podcast Kinematic, kinetic, and electromyographic data were calculated using video cameras (60 Hz), force transducers (960 Hz), and EMG (960 Hz). Weight loss vegetables and fruits Mathematical muscle modeling and optimization techniques were employed to estimate internal muscle forces.


Overall, the squat generated approximately twice as much hamstring activity as the leg press and knee extensions. Weight loss for dummies Quadriceps muscle activity was greatest in CKCE when the knee was near full flexion and in OKCE when the knee was near full extension. Weight loss doctors in pa OKCE produced more rectus femoris activity while CKCE produced more vasti muscle activity. Weight loss dinner recipes Tibiofemoral compressive force was greatest in CKCE near full flexion and in OKCE near full extension. Lose weight fast tips pro ana Peak tension in the posterior cruciate ligament was approximately twice as great in CKCE, and increased with knee flexion. Paleo alcohol Tension in the anterior cruciate ligament was present only in OKCE, and occurred near full extension. Healthy diet quotes Patellofemoral compressive force was greatest in CKCE near full flexion and in the mid-range of the knee extending phase in OKCE.

An understanding of these results can help in choosing appropriate exercises for rehabilitation and training.

The Influence of Knee Alignment on Lower Extremity Kinetics During Squats

• “Although these changes in power distribution are small, the difference in malaligned and control squat trunk power had very large effect sizes (Figs. Exercise near me 6 and 7). Special k diet plan instructions This supports that the change in distribution of joint power alters the nature of the squat from a primarily quadriceps dominant exercise (Isear et al., 1997; Escamilla et al., 1998; Caterisano et al., 2002; Dionisio et al., 2008) to increased trunk contribution to execute the movement (Escamilla et al., 2001; Dionisio et al., 2008). Military diet shopping list Sports medicine professionals may need to consider the potential for excessive loading on the knee joint with knee excursion in the sagittal or frontal plane. Diet foods to lose weight fast “

[Show abstract] [Hide abstract] ABSTRACT: The squat is an assessment of lower extremity alignment during movement, however there is little information regarding altered joint kinetics during poorly performed squats. Paleo diet corn The purpose of this study was to examine changes in joint kinetics and power from altered knee alignment during a squat. Paleozoic era major events Thirty participants completed squats while displacing the knee medially, anteriorly, and with neutral alignment (control). Diet plan for abs in hindi Sagittal and frontal plane torques at the ankle, knee, and hip were altered in the descending and ascending phase of the squat in both the medial and anterior malaligned squat compared to the control squat. Diet plan to lose weight fast in a week Ankle and trunk power increased and hip power decreased in the medial malaligned squat compared to the control squat. Protein diet recipes for weight loss Ankle, knee, and trunk power increased and hip power decreased in the anterior malaligned squat compared to the control squat. Weight loss journey motivation Changes in joint torques and power during malaligned squats suggest that altered knee alignment increases ankle and trunk involvement to execute the movement. Exercise calories burned chart Increased anterior knee excursion during squatting may also lead to persistent altered loading of the ankle and knee. Weight calculator for steel Sports medicine professionals using the squat for quadriceps strengthening must consider knee alignment to reduce ankle and trunk involvement during the movement.

The Sticking Point in the Bench Press, the Squat, and the Deadlift: Similarities and Differences, and Their Significance for Research and Practice

• “The only muscle which did show some albeit slight change at the sticking point was vastus medialis, the most activated muscle in the lift, which demonstrated a transient increase in activity. Lose belly fat overnight reviews However, the authors’ statistical analysis as well as previous findings recorded in the literature [55, 56] suggest that this was a chance occurrence rather than a genuine pattern. Best diet for menopause to lose weight “

[Show abstract] [Hide abstract] ABSTRACT: Ever since it was first observed and especially so in recent years, the phenomenon of the so-called “sticking point'” in resistance training has attracted a substantial amount of sports and exercise science research. Lose weight fast tips in hindi Broadly speaking the sticking point is understood as the position in the range-of-motion of a lift at which a disproportionately large increase in the difficulty to continue the lift is experienced. Exercise for back pain after cesarean delivery Hence the sticking point is inherently the performance bottleneck and is also associated with an increased chance of exercise form deterioration or breakdown. Military diet reviews 2015 Understanding the aspects of lifting performance which should be analysed in order to pinpoint the cause of a specific sticking point and therefore devise an effective training strategy to overcome it, is of pervasive importance to strength practitioners and instrumental for the avoidance of injury and continued progress. Losing weight after 40 loose skin In this paper we survey a range of physiological and biomechanical mechanisms which contribute to the development of sticking points, and led by this insight review and analyse the findings of the existing observational research on the occurrence of sticking points in three ubiquitous exercises: the bench press, the squat, and the deadlift. Healthy diet chart for weight loss The findings of our analysis should be used to inform future research and current resistance training practice.

[Show abstract] [Hide abstract] ABSTRACT: Possible delays in pre-activation or deficiencies in the activity of the dynamic muscle stabilizers of the knee and hip joints are the most common causes of the patellofemoral pain syndrome (PFPS). Healthy diet benefits The aim of the study was to compare kinematic variables and electromyographic activity of the vastus lateralis, biceps femoris, gluteus maximus and gluteus medius muscles between patients with PFPS and health subjects during the single leg triple hop test (SLTHT). Exercise schedule for abs This study included 14 female with PFPS (PFPS group) and 14 female healthy with no history of knee pain (Healthy group). Exercise intolerance in dogs Kinematic and EMG data ware collected through participants performed a single session of the SLTHT. Paleo diet oatmeal The PFPS group exhibited a significant increase (p<0.05) in the EMG activity of the biceps femoris and vastus lateralis muscles, when compared with the healthy group in pre-activity and during the stance phase. Paleo diet approved foods This same result was also found for the vastus lateralis muscle (p<0.05) when analyzing the EMG activity during the eccentric phase of the stance phase. Weight loss heart rate In kinematic analysis, no significant differences were found between the groups. Exercise guidelines These results indicate that biceps femoris and vastus lateralis muscles mainly during the pre-activation phase and stance phases of the SLTHT are more active in PFPS group among healthy group.

Data provided are for informational purposes only. Exercise 21 human reflex physiology Although carefully collected, accuracy cannot be guaranteed. Paleo alfredo sauce Publisher conditions are provided by RoMEO. H pylori diet plan Differing provisions from the publisher’s actual policy or licence agreement may be applicable.

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