The Effect of Abdominal Muscle Activation Techniques on Trunk and Lower Limb Mechanics During the Single-Leg Squat Task in Females

Linde, Lukas D; Archibald, Jessica; Lampert, Eve C.; Srbely, John

doi:10.1123/jsr.2016-0038

Cited by 6 publications

(5 citation statements)

References 23 publications

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“…The CT protocol was based on the principles of stabilization, motor control, and trunk muscle strengthening (Boucher et al, 2016; Fulford et al, 2017). There was a warm‐up period, which lasted from 5 to 10 min, and consisted of performing hollowing and bracing maneuvers (Linde et al, 2017). Subsequently, the participants performed mobility exercises for the thoracic, lumbar, and hip regions, five sets of each.…”

Section: Methodsmentioning

confidence: 99%

Neuroendocrine effects of a single bout of functional and core stabilization training in women with chronic nonspecific low back pain: A crossover study

Santos

Vasconcelos³

et al. 2022

Physiological Reports

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Exercise‐induced hypoalgesia (EIH) is characterized as the pain reduction after an exercise session and it seems to be related to the release of plasma β‐endorphin. In this sense, the core stabilization training (CT) has been suggested for patients with chronic nonspecific low back pain (CNSLBP), but it is unclear whether it induces EIH. Patients with CNSLBP have neuromotor dysfunctions that can affect the performance of functional tasks, thus, performing functional training (FT) could improve motor control and promote EIH, since functional training uses multi‐joint exercises that aim to improve the functionality of actions performed in daily life. EIH is usually assessed using quantitative sensory tests (QST) such as conditioned pain modulation, pressure pain threshold, and temporal summation. Thus, the sum of parameters from quantitative sensory tests and plasma β‐endorphin would make it possible to understand what the neuroendocrine effects of FT and CT session are. Our study compared the acute effect of CT and FT on the EIH and plasma β‐endorphin release, and correlated plasma β‐endorphin with quantitative sensory testing in patients with CNSLBP. Eighteen women performed two training sessions (CT and FT) with an interval of 48 h between sessions. EIH was assessed by QST and plasma β‐endorphin levels. Results showed that only FT significantly increased plasma β‐endorphin (FT p < 0.01; CT p = 0.45), which correlated with pain pressure threshold (PPT) and conditioned pain modulation (CPM). However, QST values were not different in women with CNSLBP after CT or FT protocols. Plasma β‐endorphin correlated with PPT and CPM, however, the same did not occur with a temporal summation.

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Section: Methodsmentioning

confidence: 99%

Neuroendocrine effects of a single bout of functional and core stabilization training in women with chronic nonspecific low back pain: A crossover study

Santos

Vasconcelos³

et al. 2022

Physiological Reports

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“…Moreover, this closer look at trunk control would require an analysis of neuromuscular parameters to better define muscle activation strategies behind trunk motion. Recent studies have provided information about trunk muscle neuromuscular control during cutting maneuvers (Jamison et al, 2013;Oliveira et al, 2013a;Oliveira et al, 2013b) or during an isolated trunk perturbation paradigm (Vera-Garcia et al, 2007) and during a squat task (Linde et al, 2018). Interestingly, some authors used trunk muscle contraction ratios beside the mean activation amplitude to provide a functional explanation for trunk motion (Jamison et al, 2013;Vera-Garcia et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Is There a Sex Difference in Trunk Neuromuscular Control among Recreational Athletes during Cutting Maneuvers?

Mornieux¹,

Gehring²,

Gollhofer³

2021

jsportscimed

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Trunk motion is most likely to influence knee joint injury risk, but little is known about sex-related differences in trunk neuromuscular control during changes of direction. The purpose of the present study was to test whether differences in trunk control between males and females during changes of direction exist. Twelve female and 12 male recreational athletes (with at least 10 years of experience in team sport) performed unanticipated changes of direction with 30° and 60° cut angles, while 3D trunk and leg kinematics, ground reaction forces and trunk muscles electromyography were recorded. Trunk kinematics at the time of peak knee abduction moment and directed co-contraction ratios for trunk muscles during the pre-activation and weight acceptance phases were determined. None of the trunk kinematics and co-contraction ratio variables, nor peak knee abduction moment differed between sexes. Compared to the 30° cut, trunk lateral flexion remained unchanged and trunk external rotation was reduced (p < 0.001; η²p (partial eta squared for effect size) = 0.78), while peak knee abduction moment was increased (p < 0.001; η²p = 0.84) at 60°. The sharper cutting angle induced muscle co-contraction during the pre-activation directed less towards trunk flexors (p < 0.01; η²p = 0.27) but more towards trunk medial flexors and rotators opposite to the movement direction (p < 0.001; η²p > 0.46). However, muscle co-contraction during the weight acceptance phase remained comparable between 30° and 60°. The lack of sex-related differences in trunk control does not explain knee joint injury risk discrepancies between sexes during changes of direction. Trunk neuromuscular strategies during sharper cutting angles revealed the importance of external oblique muscles to maintain trunk lateral flexion at the expense of trunk rotation. This provides new information for trunk strength training purposes for athletes performing changes of direction.

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“…Football-tennis is a dynamic activity, with variable effort intensity, from maximum to moderate depending on the phases of the game. Muscle training specific to strength development requires training adapted programs, typical of the game of football-tennis that must be based on in-depth knowledge of the skeletal muscle structure of the lower limbs (gluteal muscles, thigh muscles, tailor, femoral quadriceps, femoral biceps, thigh adductors), leg muscles (gastrocnemius, pronators and supinator of the leg, flexors and extensors), and plantar muscles (extensors of the toes and soles)), the type of voluntary muscle contractions, how to select and activate muscular fibres, and complex mechanisms specific to muscle contraction [11][12][13][14][15]. The balanced development of the muscles of the lower limbs of the football-tennis players represents an important condition for the optimization of the technical and physical performances [16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Optimizing the Explosive Force of the Elite Level Football-Tennis Players through Plyometric and Specific Exercises

Gherghel

Bădău

et al. 2021

IJERPH

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The aim of the research was to implement an athletic program to improve the explosive force in order to optimize physical fitness at the level of elite football-tennis players and evaluate the progress made through specific tests using the Opto Jump. The research included 10 elite European and world-class players, on whom an experimental program was applied in order to improve the explosive force of the limbs in conditions of speed, endurance, and dynamic balance. Study tests: five vertical jumps on the spot, on the left/right leg; five back and forth jumps on the left/right leg; five left/right side jumps on the left/right leg; vertical jumps on both legs 60 s; BFS vertical jumps. For each test, the following parameters specific to the explosive force were statistically analyzed: contact time (s); flight time (s); jump height (cm), jump power (w/kg); RSI—Reactive Strength Index, defined as Height (m/s). In the study, the average value of the parameters specific to the jumps performed in each test was taken into account. During the study, the tests were performed and processed on the Opto Jump device and software. In all tests of the experiment monitored through Opto Jump, significant progress was made in the final test compared to the initial one, which demonstrates the efficiency of the physical training program implemented for the development of explosive force, with an impact on the sports performance of elite players. The most relevant results obtained for the left leg regarding the improvement of the explosive force of the lower limbs materialized in the jump height parameter was in the test of five vertical jumps on one leg on the spot, and for the right leg in the tests of: five back and forth jumps and five left/right side jumps. The most significant advances in the study were in the tests, in descending order of their weight: 60 s vertical jumps on both legs; five back-and-forth jumps and five left/right side jumps, five vertical jumps on one leg standing, and BFS vertical jumps.

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The Effect of Abdominal Muscle Activation Techniques on Trunk and Lower Limb Mechanics During the Single-Leg Squat Task in Females

Abstract: The lack of reduction in trunk, hip, and knee measures of ACL injury risk during abdominal hollowing and bracing suggests that these techniques alone may provide minimal benefit in ACL injury prevention training.

Cited by 6 publications

References 23 publications

Neuroendocrine effects of a single bout of functional and core stabilization training in women with chronic nonspecific low back pain: A crossover study

Neuroendocrine effects of a single bout of functional and core stabilization training in women with chronic nonspecific low back pain: A crossover study

Is There a Sex Difference in Trunk Neuromuscular Control among Recreational Athletes during Cutting Maneuvers?

Optimizing the Explosive Force of the Elite Level Football-Tennis Players through Plyometric and Specific Exercises

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