Dynamic Squat Research Articles

The Effect of Waistbands on Intra-Abdominal Pressure and Respiratory Mechanics During Bodyweight Exercise.

Leahy, MG, Kipp, S, and Sheel, AW. The effect of waistbands on intra-abdominal pressure and respiratory mechanics during bodyweight exercise. J Strength Cond Res XX(X): 000-000, 2024-Athletic apparel is often designed with high-waisted, elastic bands around the abdomen to provide comfort and support during functional exercises. The abdominal musculature aids in both active respiration and trunk stability during the exercise, but whether high-waistband athletic garments affect pulmonary function and respiratory mechanics is unknown. Ten healthy women participated in a single-visit study. Subjects were fitted with esophageal and gastric balloon-tipped catheters and completed three bouts of isometric and dynamic bodyweight squats, lunges, and planks, during which ventilation and pulmonary pressures were continuously recorded. Resting pulmonary function was unchanged by high-waistband garments. During isometric squatting exercise, peak abdominal pressure was significantly greater while wearing high-waistband garments (17 ± 6 cmH2O), relative to low-waistband garments (15 ± 6 cmH2O, p = 0.032). The work of breathing was reduced when completing dynamic squat exercise in a high-waistband garment (16.2 ± 3.9 J·min-1), relative to a low-waistband garment (18.6 ± 5.7 J·min-1, p = 0.026). High waistbands had no effect on abdominal pressures or pulmonary mechanics during lunge or plank exercises. We believe our findings indicate that high-waistband garments have the capacity to alter abdominal and ventilatory mechanics during bodyweight squatting exercises but are unlikely to have an effect during other exercise movements.

Overcoming the added mass effect in FSI calculations relating to dynamic squat

This paper presents a corrected partitioned scheme for investigating fluid–structure interaction (FSI) generated by ship squat in presence of transient effects. A theoretical example describing the motion of a piston enclosed in a U-tube gives rise to an analysis of the divergence effect resulting from added mass, and it has been concluded that divergence always occurs when the mass in motion is less than the added mass. An added-mass-corrected scheme is proposed to guarantee the convergence of the coupling scheme irrespective of the mass ratio. This corrected scheme is successfully applied to the ship dynamics in an analysis of ship squat via a non-stationary potential fluid flow approach. The results of our coupled calculations have been compared to the squat stability models detailed in Alderf et al. (2010); Alderf et al. (2015) in which transient effects were neglected in the fluid flow solver. Finally, energy transfers between the ship’s motion and the fluid flow have been analyzed. We confirm the energy conservation capability of the proposed fluid–structure coupling scheme in relation to the transient response of the ship.

Changes in Muscular Activity in Different Stable and Unstable Conditions on Aquatic Platforms.

The present study aimed to analyse and compare the muscle activity of twelve participants (seven men and five women) (age 20.1 ± 0.9 years; height 170.5 ± 10 cm; body mass: 64.86 ± 8.3 kg) in two exercises, each with two variants: squat (dynamic and static) and plank (hands and elbows) in a stable environment on land and an unstable environment on an aquatic platform. The erector spinae, biceps femoris, rectus femoris, external oblique, and rectus abdominis muscles were evaluated using surface electromyography. The dynamic squat increases the recruitment of the biceps femoris and external oblique, while the static squat demands greater activation of the rectus femoris. The elbow plank exercise increases the recruitment of erector spinae muscles, and the hand plank exercise increases the recruitment of the erector spinae and external oblique. In conclusion, performing exercises in unstable conditions on an aquatic platform slightly increases muscle recruitment.

Effects of Static and Dynamic Post-Activation Potentiation Protocols on Change of Direction Performance in Adolescent Soccer Players

Summary Purpose: The study aimed to investigate the temporal effects of static and dynamic post-activation potentiation (PAP) conditioning activities on agility performance. Material and Methods: Fourteen male adolescent soccer players participated in the study. Participants performed three different conditioning activities randomly on non-consecutive days. Conditioning activities consisted of static, dynamic, and control protocols. The dynamic protocol was performed with the dynamic squat at 85% of 1-repetition maximum while the static protocol was performed 3 repetitions x 3 seconds of the isometric squat. The control protocol only completed a standardized warm-up. After the baseline measurements were taken, all protocols completed the agility test in 15th seconds, 2,4,6,8,10,12,14th minutes. Repeated measures in ANOVA were used to determine differences between PAP protocols and the Bonferroni post hoc test was employed to determine which protocol caused a significant difference. Results: There was no significant difference between protocols in baseline (p<.925, ηp2 = 0.006), however, the control protocol caused a significant difference in 15th seconds and 2nd minutes compared to static and dynamic protocols (p<.001, ηp2 = 0.73, 0.72, respectively). In the 4th and 6th minutes static and dynamic protocols caused a significant difference compared to control (p<.001, ηp2 = 0.46-0.89, respectively), and in the 8th-minute static and dynamic protocols reached the peak performance (p<.001, ηp2 = 0.96). Although in the 10-12-14th minutes static and dynamic protocols’ performance values gradually reduced. However, they always were better compared to the control protocol (p<.001, ηp2 = 0.91-0.93-0.96, respectively). Conclusions: Adolescent soccer players can benefit from both static and dynamic PAP protocols before competition or halftime to improve performance.

Ankudinov method for evaluation of river ships dynamic squat

The article describes problem of usability of Ankudinov method, which is wisely used for merchant vessels and war ships, for evaluation of river and sea-river ships squat in shallow water.The calculations by the method analysis of such usability had been made comparing methods developed for river ships taking in account shallow water. Conclusions about possibility of using the method, based on the analysis, had been made. First of all these conclusions relate to modern ships with bulbous bow

Musculoskeletal Multibody Simulation Analysis on the Impact of Patellar Component Design and Positioning on Joint Dynamics after Unconstrained Total Knee Arthroplasty.

Patellofemoral (PF) disorders are considered a major clinical complication after total knee replacement (TKR). Malpositioning and design of the patellar component impacts knee joint dynamics, implant fixation and wear propagation. However, only a limited number of studies have addressed the biomechanical impact of the patellar component on PF dynamics and their results have been discussed controversially. To address these issues, we implemented a musculoskeletal multibody simulation (MMBS) study for the systematical analysis of the patellar component’s thickness and positioning on PF contact forces and kinematics during dynamic squat motion with virtually implanted unconstrained cruciate-retaining (CR)-TKR. The patellar button thickness clearly increased the contact forces in the PF joint (up to 27%). Similarly, the PF contact forces were affected by superior–inferior positioning (up to 16%) and mediolateral positioning (up to 8%) of the patellar button. PF kinematics was mostly affected by the mediolateral positioning and the thickness of the patellar component. A medialization of 3 mm caused a lateral patellar shift by up to 2.7 mm and lateral patellar tilt by up to 1.6°. However, deviations in the rotational positioning of the patellar button had minor effects on PF dynamics. Aiming at an optimal intraoperative patellar component alignment, the orthopedic surgeon should pay close attention to the patellar component thickness in combination with its mediolateral and superior–inferior positioning on the retropatellar surface. Our generated MMBS model provides systematic and reproducible insight into the effects of patellar component positioning and design on PF dynamics and has the potential to serve as a preoperative analysis tool.

A patient-specific lower extremity biomechanical analysis of a knee orthotic during a deep squat movement

Although knee orthotics have become the preferred treatment method for rehabilitation and injury prevention, their biomechanical influence has not yet been quantified. A new type of knee joint orthosis (KJO) using a non-linear spring-loaded (NLSL) component was recently introduced to help prevent the growing number of knee injuries and aid during rehabilitation. The purpose of this case study is to quantify the lower extremity biomechanical effects and evaluate functional benefits of a new KJO as a precision treatment option. Kinematic and kinetic data obtained from two dynamic squat trials were recorded using VICONⓇ motion capture system and an AMTIⓇ force plate. This data was then applied to a modified computational musculoskeletal model. Inverse kinematics and dynamics were performed to calculate joint angles and joint moments while a static equilibrium problem was solved at each instant during the squat cycle, with and without the NLSL KJO to find individual muscle forces of the lower extremity. The NLSL KJO was seen to improve the activation in the subject's posterior chain musculature encouraging a more balanced synergy versus the inherent quadriceps dominant strategy during the squat movement, and encourage a more neutral behavior in the upright position by inhibiting movement towards terminal knee extension.

ДИНАМИЧЕСКАЯ ПРОСАДКА ТОЛКАЕМЫХ СОСТАВОВ И ОСОБЕННОСТИ ЕЁ ОПРЕДЕЛЕНИЯ

In the article the question concerning the dynamic squat manifestation on pushing vessel in the shallow water condition is examined. In the article existing methods of dynamic squat calculating for pushing compound analysis is carried out, for instance: V.Pavlenko’s method, A.Polunin’s method , P. Shanchurov ‘s method , G. Suhomel’s method , doctor C. Barross’s method, Volga State University of Water Transport method.. Basing on the existing methods analysis we came to the conclusion of using Volga State Unveersity of Water Transport method.The method helps to calculate the pushing vessels dynamic squat, it also considers the pushing vessels hull’s shape .In the article the pusing vessles dynamic squat calculation formula considering the pushing vessels formation peculiarities is presented.

Transmission of Acceleration From a Synchronous Vibration Exercise Platform to the Head During Dynamic Squats.

Many research studies have evaluated the effects of whole-body vibration exercise on muscular strength, standing balance, and bone density, but relatively few reports have evaluated safety issues for vibration exercises. Knee flexion reduces acceleration transmission to the head during static exercise. However, few studies have evaluated dynamic exercises. The purpose of this investigation was to evaluate the transmission of acceleration to the head during dynamic squats. Twelve participants performed dynamic squats (0°-40° of knee flexion) on a synchronous vertical whole-body vibration platform. Platform frequencies from 20 to 50 Hz were tested at a peak-to-peak nominal displacement setting of 1 mm. Transmissibilities from the platform to head varied depending on platform frequency and knee flexion angle. We observed amplification during 20 and 25 Hz platform vibration when knee flexion was <20°. Vibration from exercise platforms can be amplified as it is transmitted through the body to the head during dynamic squats. Similarly, this vibration energy contributes to observed injuries such as retinal detachment. It is recommended that knee flexion angles of at least 20° and vibration frequencies above 30 Hz are used when performing dynamic squat exercises with whole-body vibration.

Cardiorespiratory responses in different types of squats and frequencies of whole body vibration in patients with chronic obstructive pulmonary disease.

This study aims to investigate the cardiorespiratory responses to different vibration frequencies to characterize the intensity of exercise, as well as to compare the effect of two types of squatting exercises (static and dynamic) on the whole body vibration (WBV) exercise in individuals with chronic obstructive pulmonary disease (COPD). Twenty-six subjects were divided and paired into healthy and COPD groups that performed static squatting associated with WBV (frequencies: 30, 35, and 40 Hz; amplitude: 2 mm) and dynamic squatting associated with WBV (frequency: 35 Hz; amplitude 2 mm) on a vertical vibration platform. Oxygen consumption (V̇o2), heart rate (HR), minute ventilation (V̇e), ratio of minute ventilation to oxygen production (V̇e/V̇o2), ratio of minute ventilation to carbon dioxide production (V̇e/V̇co2), oxygen saturation (SpO2), and rating of perceived exertion were measured. For both groups, there was a decrease in V̇e/V̇o2 and V̇e/V̇co2 ratios during static and dynamic squats, as well as an increase in other cardiorespiratory parameters, and no significant difference existed between them. There was an effect of the type of squat on the HR variation; the values in the static squat were higher than those of the dynamic squat in both groups. There was a significant difference with a reduction in SpO2 at 40 Hz frequency when compared with 30 Hz in the COPD group. The other variables behaved similarly between the frequencies. The WBV exercise, regardless of the frequencies used, represented a mild effort that promoted cardiorespiratory response in COPD, with greater responses in the static squat and no adverse effect. NEW & NOTEWORTHY This study showed that an acute session of light exercise of whole body vibration (WBV) can increase the cardiorespiratory responses in patients with chronic obstructive pulmonary disease (COPD), reaching values similar to that of the control group. The results might contribute, therefore, to the elaboration of exercise protocols with WBV for the treatment of patients with COPD during rehabilitation. Thus, future studies referring to training on the vibratory platform could use these exercise parameters and demonstrate possible long-term benefits.

The Effects of Whole Body Vibration Treatments on Lower Body Muscular Activity in Well-Trained Athletes from Different Sports Branches

A limited number of acute whole body vibration (WBV) studies have investigated the effects of WBV treatments which were applied with different vibration frequencies and amplitude combinations on lower extremity muscle activation of well-trained athletes from different sports branches. To compare the effects of WBV on lower extremity muscle activation via Surface Electromyography (sEMG) of well-trained athletes from different sports branches (soccer, basketball and swimming) during static and dynamic squat exercises. sEMG activities of Tibialis Anterior (TA), Gastrocnemius Medialis (GM), Vastus Medialis (VM), Rectus Femoris (RF), Vastus Lateralis (VL) and Biceps Femoris (BF) muscles of 7 male soccer players, 7 male basketball players, and 6 male swimmers were recorded during WBV applied in static squat and dynamic squat positions with different frequencies (30-35-40 Hz) and amplitude (2-4 mm) combinations separated from each other by 5 min passive rest periods. Each combination was applied for 30 sec. The highest muscle activation was determined in TA of the swimmers compared to soccer players during static squat with 4mm-30Hz WBV application (p=0.027). The lowest muscle activation was also determined in VL of the swimmers compared to soccer players during static squat with 2mm-40Hz WBV (p=0.049). During dynamic squat with 4mm-40Hz WBV, the highest muscle activity was determined in RF of the basketball players compared to swimmers (p=0.030). However, dynamic squat with 2mm-40Hz WBV application gave rise to the lowest muscle activation in VL of the basketball players compared to soccer players (p=0.042). Well-trained athletes from different sports branches demonstrated different neuromuscular responses to acute WBV treatments. WBV during dynamic squatting which was applied with 4mm-40 Hz may be more beneficial in enhancing neuromuscular performance acutely for well-trained male athletes since it resulted in higher levels of muscular activation responses according to the present study.

Effects of the type of exercise performed on the vibration delivered during whole-body vibration exercises

While the internal load factors of whole-body vibration training have been widely investigated, the study of external load magnitude has been overlooked. Thus, the aim of the present study was to evaluate differences in whole-body vibration stimulus magnitude between static/dynamic whole-body vibration training at various vibration conditions. Four Pro 5 Plate vibration platforms were exposed to twelve different vibration conditions and a triaxial USB Impact X250-2 accelerometer was used to measure platform acceleration during each condition. Paired samples t-test was calculated to evaluate differences among amplitude, frequency, time of acceleration and time of deceleration of each platform at each vibration condition and during static (squat of 90° knee flexion) or dynamic exercise (from stand to 90° knee flexion squat). Also, the intra-class correlation coefficients were examined in order to assess the inter-instrument reliability. Peak-to-peak amplitude, frequency, time of acceleration and deceleration of the vibration platform were not modified by the type of exercise performed. Moreover, the four platforms tested showed high repeatability values during the execution of free vibration, static or dynamic squat in all vibration conditions. This study confirms that the vibration delivered by the Pro 5 Plate vibration platform is not modified during the realization of static or dynamic exercises.

Comparing periodised protocols for the maintenance of strength and power in resistance-trained women

Purpose: The purpose of the study was to compare the effects of daily undulating periodisation (DUP) and session undulating periodisation (SUP) for maintaining strength and power over a 3-wk period in a group of resistance-trained women. DUP comprised one session each of strength and power training while DUP combined both strength and power training within each session. Both training programmes were equalised for training volume and intensity. Methods: Sixteen resistance-trained women were pre-tested for body mass, mid-arm and mid-thigh girths, one-repetition maximum (1 RM) dynamic squat (SQ) and bench press (BP), and power during countermovement jumps (CMJ) and bench press throws (BPT). The 1 RM SQ and BP data were used to assign the participants into groups for twice a week training. Results: A two-way (group x time) analysis of variance (ANOVA) with repeated measures for time found no significant changes in body mass, mid-arm girth, 1 RM BP and SQ, and BPT and CMJ power for both groups. However, significant changes in mid-thigh girth were found (F1, 13 = 5.733, p = 0.032). Pooled BP data indicated improved upper body strength (BP: F1, 13 = 6.346, p = 0.025) and decreased CMJ power (p = 0.016). Conclusions: Both DUP and SUP programmes increased upper-body strength and maintained lower-body strength adequately across a 3-wk phase probably because the participants were weaker in the upper-body and the lower-body had a reduced capacity for strength adaptations and improvements.

What's the secret behind the benefits of whole-body vibration training in patients with COPD? A randomized, controlled trial

BackgroundSeveral studies have shown that whole-body vibration training (WBVT) improves exercise capacity in patients with severe COPD. The aim of this study was to investigate the determinants of improved exercise capacity following WBVT. MethodsSeventy-four COPD patients (FEV1: 34 ± 9%predicted) were recruited during a 3-week inpatient pulmonary rehabilitation (PR) program. Conventional endurance and strength exercises were supplemented with self-paced dynamic squat training sessions (4bouts*2min, 3times/wk). Patients were randomly allocated to either a WBVT-group performing squat training on a side-alternating vibration platform (Galileo) at a high intensity (24–26 Hz) or a control group performing squat training without WBVT. ResultsPatients in the WBVT group significantly improved postural balance in several domains compared to the control-group (i.e. tandem stance: WBVT +20% (95%CI 14 to 26) vs. control −10% (95%CI 6 to 15), p < 0.001; one-leg stance: WBVT +11% (95%CI 4 to 19) vs. control −8% (95%CI -19 to 3), p = 0.009). Six-minute walk distance and muscle power but not muscle strength were also significantly improved compared to control group. ConclusionsImplementation of WBVT improves postural balance performance and muscle power output. The neuromuscular adaptation related to improved balance performance may be an important mechanism of the improvement in exercise capacity after WBVT especially in COPD patients with impaired balance performance and low exercise capacity.

Intermuscular Motor Unit recruitment of Lower limb according to contralateral hip motion during dynamic and isometric single leg squat

Background/Objectives: The purpose of this study is to compare the change in intermuscular motor unit recruitment of lower limb and finding better exercises. Methods/Statistical analysis: Twenty-eight male and female adults agreed to participate in this study. Volunteers performed six motion in random sequence what used program of draw. One way repeated ANOVA was used to compare the change. A post hoc test was performed using Bonferroni correction. Findings: There was a significant difference that was about intermuscular motor unit recruitment of lower limb between isometric and dynamic. When subjects took single leg squat (SLS) exercise during hip flexion, abduction and extension with knee flexion of non-dominant lower limb by isometric and dynamic, only one muscle, vastus medilalis was a significant difference in isometric. Improvements/Applications: the isometric SLS exercise was more effective of lower limb. Also, doing SLS exercise, extension and abduction were more effective of lower limb.

The effects of task execution variables on the musculature activation strategy of the lower trunk during squat lifting

The main objective of this study was to investigate the innervation behavior of lower trunk musculature to determine the muscular activation strategy during free dynamic squat lifting. This may clarify how lower trunk musculature activation compliments task execution variables to control motion during labor and industrial lifting tasks. In total, 12 healthy men volunteered to perform symmetric squat lifting of boxes of various masses (4, 8 and 12 kg) at slow and fast speeds. Eight-channel electromyography was performed on two pairs of abdominal (rectus abdominis and external oblique) and lower back muscles (iliocostalis lumborum and multifidus). Movement patterns were extracted using a 3D-linked segment model and a Vicon system. The results indicated that there were significant increases (all p-values < 0.05) in the mean muscle activation of the right and left multifidus and iliocostalis lumborum with increases in the lift speed and box weight. Furthermore, the results indicated that there were significant decreases (all p-values < 0.05) in the time required for the peak activation of the right and left multifidus, iliocostalis lumborum and external oblique with increases in the lift speed and box weight. Finally, the lower trunk musculature activation strategy was revealed to be compatible with different task execution variables, controlling motion in a manner that compensated for the effects of task execution variables. The findings of this study may effectively be applied to ergonomics, particularly to symmetric squat lifting.

Neuromuscular Fatigue and Physiological Responses After Five Dynamic Squat Exercise Protocols.

This aimed to analyze neuromuscular, physiological and perceptual responses to a single bout of 5 different dynamic squat exercise protocols. In a randomized and counterbalanced order, 15 male resistance-trained athletes (mean ± SD; age: 23.1 ± 1.9 years, body mass: 77.4 ± 8.0 kg) completed traditional multiple sets (MS: 4 × 6, 85% 1 repetition maximum [RM]), drop sets (DS: 1 × 6, 85% 1RM + 3 drop sets), eccentric overload (EO: 4 × 6, 70% 1RM concentric, 100% 1RM eccentric), flywheel YoYo squat (FW: 4 × 6, all-out), and a plyometric jump protocol (PJ: 4 × 15, all-out). Blood lactate (La), ratings of perceived exertion (RPE), counter movement jump height (CMJ), multiple rebound jump (MRJ) performance, maximal voluntary isometric contraction force, serum creatine kinase (CK) and delayed onset muscle soreness were measured. Immediately post exercise, La was significantly (p < 0.001) higher in FW (mean ± 95% confidence limit; 12.2 ± 0.9 mmol·L) and lower in PJ (3.0 ± 0.8 mmol·L) compared with MS (7.7 ± 1.5 mmol·L), DS (8.5 ± 0.6 mmol·L), and EO (8.2 ± 1.6 mmol·L), accompanied by similar RPE responses. Neuromuscular performance (CMJ, MRJ) significantly remained decreased (p < 0.001) from 0.5 to 48 hours post exercise in all protocols. There was a significant time × protocol interaction (p ≤ 0.05) in MRJ with a significant lower performance in DS, EO, and FW compared with PJ (0.5 hours post exercise), and in EO compared with all other protocols (24 hours post exercise). A significant main time effect with peak values 24 hours post exercise was observed in CK serum concentrations (p < 0.001), but there was no time × protocol interaction. In conclusion, (a) metabolic and perceptual demands were higher in FW and EO compared with MS, DS and PJ, (b) neuromuscular fatigue was consistent up to 48 hours post exercise in all protocols, and

Non-invasive estimation of cardiovascular parameters using ballistocardiography.

Ballistocardiography is a non-invasive technique to estimate heart function and relative changes in cardiac output. The goal of this study was to establish the relationship between ballistocardiogram (BCG) parameters and changes in cardiovascular parameters. A group of 20 subjects performed three different exercises on a force plate. In this study, we have characterized the significant differences induced by static and dynamic squats, and controlled respiration exercises on BCG parameters such as IJ-amplitude and RJ-time. The dynamic squat exercise induced the largest changes in IJ-amplitude (107-123% higher) and the RJ-time (21-23% lower). Furthermore, the IJ-amplitude of the BCG signal was found to be positively related to the cardiac output.

Effects of complementary whole-body vibration training in patients after lung transplantation: A randomized, controlled trial

In recent years, some studies have shown that whole-body vibration training (WBVT) may be a beneficial training mode in patients with chronic obstructive pulmonary disease (COPD). However, the effects of WBVT in patients after lung transplantation (LTx) have not yet been investigated. Eighty-three LTx patients (56 ± 7 years of age, 51% male, 10 ± 12 weeks post-LTx, forced expiratory volume in 1 second [FEV1] 68 ± 20 percent predicted [% pred], baseline 6-minute walk distance [6MWD] 350 ± 120 meters) admitted to a 4-week inpatient multidisciplinary program of pulmonary rehabilitation (PR) performed supervised endurance and strength training on 5 days per week. In addition, patients were randomly assigned to 1 of 2 supervised intervention groups on 3 days/week: (1) 4 × 2 minutes of bilateral dynamic squat exercises on a side-alternating vibration platform at 24 to 26 Hz (WBVT); and (2) a control group (CON) with the same amount of exercise time on the floor. Seventy patients completed the study (WBVT: n = 34; CON: n = 36). Improvement in 6MWD was significantly (p = 0.029) higher in the WBVT group (83.5 meters [95% CI 65.4 to 101.7]) compared with the CON group (55.2 m [95% CI 37.5 to 72.8]). Also, peak work rate increased significantly (p = 0.042) more in the WBVT group (16.8 W [95% CI 13.5 to 20.5]) than in the CON group (12.6 W [95% CI 9.0 to 16.1]). No adverse events related to the intervention occurred during the study. A complementary WBVT on top of conventional endurance and strength training seems to be a feasible and safe exercise modality in patients after LTx. Furthermore, it may even enhance the benefits of a comprehensive PR on exercise capacity.

Effects of Quadriceps Strength After Static and Dynamic Whole-Body Vibration Exercise

Numerous studies have shown performance benefits including whole-body vibration (WBV) as a training modality or an acute exercise protocol when used as a component of the resistance training program. Some studies have indicated that performing dynamic exercises as compared with static position exercises while exposed to WBV might be beneficial; however, evidence is lacking. Thus, the purpose of this study was to determine if an acute bout of dynamic versus static squats performed during WBV results in increase in quadriceps force production by means of dynamic isokinetic knee extension and flexion exercise. Nonresistance-trained healthy young men and women (N = 21) of 18-25 years participated in 4 protocols with 2-week rest in-between. Protocol 1 consisted of 5 sets of 10 dynamic squats without vibration; Protocol 2: 5 sets of 30-second static squats without vibration; Protocol 3: 5 sets of 10 dynamic squats with 30-Hz WBV for a total of 2.5 minutes; and Protocol 4: 5 sets of 30-second static squats with 30-Hz WBV for a total of 2.5 minutes. Prestrength tests (1 set of 4 repetitions at 100° · s(-1) for the knee extension exercise) was performed within 5 minutes of starting each protocol, and poststrength testing was performed within 1 minute of completing each protocol. Strength outcomes were analyzed by repeated measures analysis of variance with a significance level set at p ≤ 0.05. A significant decrease in strength was observed after dynamic and static squats without WBV (p = 0.002); an increase in strength after dynamic squats with WBV (p = 0.003); and a decrease in strength after static squats with WBV (p = 0.003). The inclusion of WBV to dynamic resistance exercise can be an added modality to increase strength. Whole-body vibration can have varied effects in altering muscle strength in untrained individuals according to the type of resistance training performed. As a dynamic squat with WBV seems to immediately potentiate neuromuscular functioning, the combination of dynamic exercises and WBV could be used as a potential warm-up procedure before resistance exercise.