Using Bar Velocity to Predict Maximum Dynamic Strength in the Half-Squat Exercise

Loturco, Irineu; Pereira, Lucas A.; Abad, César C. Cal; Gil, Saulo; Kitamura, Kátia; Kobal, Ronaldo; Nakamura, Fábio Yuzo

doi:10.1123/ijspp.2015-0316

Cited by 72 publications

(76 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…PV related to the load displacement equivalent to the 25, 50, 75 and 100% of the judoka’s body weight (PV25%BW, PV50%BW, PV75%BW and PV100%BW, respectively) was calculated through a regression equation. The 1RM was considered as the absolute load linked to a MPV of 0.33 m·s -1 obtained from the individual load-velocity relationships [ 22 , 23 ].…”

Section: Methodsmentioning

confidence: 99%

Effect of acute exposure to moderate altitude on kinematic variables of the ippon-seoi-nage and its relationship with the countermovement jump in elite judokas

et al. 2018

View full text Add to dashboard Cite

This study aimed to assess the effect of acute exposure to moderate altitude on kinematic variables of the ippon-seoi-nage and on the mechanical outputs of the countermovement jump (CMJ). Thirteen elite male judokas from the Spanish Judo Training Centre in Valencia (age: 21.54 ± 2.15 years) participated in the study. All of them performed an incremental CMJ test and an ippon-seoi-nage technique test before (N) and after the ascent to a moderate altitude of 2320 m above the sea level (H). A linear velocity transducer was attached to the bar to assess the mechanical outputs of each loaded CMJ at different percentages of their own body weight (25, 50, 75 and 100%). A wearable sensor was used to assess the kinematic variables (times, accelerations and angular velocities) transferred to a dummy during the technique test. The kinematic variables showed great individual reliability (CV = 8.46% in N; CV = 8.37% in H), which contrasted with low reliability observed when the whole group was considered. The smallest important CV ratio (>1.15) showed that H caused changes in the reliability of the kinematic variables, with some variables becoming more reliable and others losing the reliability they had in N. H also caused small increments in peak velocity across all loads tested in the CMJ (+3.67%; P<0.05). In contrast, no changes in the kinematic variables were verified. In addition, there was no association between leg extension capability and the acceleration (r = -0.16 ± 0.19 in N; r = -0.24 ± 0.19 in H) or angular velocity (r = -0.19 ± 0.24 in N; r = -0.30 ± 0.26 in H) of the ippon-seoi-nage, nor was acute exposure to H found to affect this association (P>0.05). Differences between individual and within-groups CV confirm the individual adaptations that each judoka makes during this technique. Additionally, the CV ratio shows a change in the space-time pattern of the technique in H. Therefore, it would be necessary to include an adaptation period to adapt the technique after the ascent in altitude. Further studies are needed to confirm the relationship and transference from the velocity gains in CMJ during altitude training.

show abstract

Section: Methodsmentioning

confidence: 99%

Effect of acute exposure to moderate altitude on kinematic variables of the ippon-seoi-nage and its relationship with the countermovement jump in elite judokas

et al. 2018

View full text Add to dashboard Cite

show abstract

“…11,12 Notably, it has also been reported that these relationships are not affected by individual strength levels or training background. 13,14 These strong relationships open up the possibility of prescribing exercise intensity on a daily basis by adjusting the absolute load (kg) to match the movement velocity associated with the %1RM that is scheduled for the training session. 8 Afterward, it has been shown that individual load-velocity relationships could provide more accurate predictions of %1RM from barbell velocity than general equations.…”

Section: Introductionmentioning

confidence: 99%

Effects of velocity loss in the bench press exercise on strength gains, neuromuscular adaptations, and muscle hypertrophy

Pareja‐Blanco

Alcázar

Cornejo-Daza

et al. 2020

Scandinavian Med Sci Sports

View full text Add to dashboard Cite

This study aimed to compare the effects of four velocity-based training (VBT) programs in bench press (BP) between a wide range of velocity loss (VL) thresholds-0% (VL0), 15% (VL15), 25% (VL25), and 50% (VL50)-on strength gains, neuromuscular adaptations, and muscle hypertrophy. Methods: Sixty-four resistance-trained young men were randomly assigned into four groups (VL0, VL15, VL25, and VL50) that differed in the VL allowed in each set. Subjects followed a VBT program for 8-weeks using the BP exercise. Before and after the VBT program the following tests were performed: (a) cross-sectional area (CSA) measurements of pectoralis major (PM) muscle; (b) maximal isometric test; (c) progressive loading test; and (d) fatigue test. Results: Significant group x time interactions were observed for CSA (P < .01) and peak root mean square in PM (peak RMS-PM, P < .05). VL50 showed significantly greater gains in CSA than VL0 (P < .05). Only the VL15 group showed significant increases in peak RMS-PM (P < .01). Moreover, only VL0 showed significant gains in the early rate of force development (RFD, P = .05), while VL25 and VL50 improved in the late RFD (P ≤ .01-.05). No significant group × time interactions were found for any of the dynamic strength variables analyzed, although all groups showed significant improvements in all these parameters. Conclusion: Higher VL thresholds allowed for a greater volume load which maximized muscle hypertrophy, whereas lower VL thresholds evoked positive neuromuscular-related adaptations. No significant differences were found between groups for strength gains, despite the wide differences in the total volume accumulated by each group.

show abstract

“…The kinematics and kinetics associated to resistance training are believed to be critical stimuli for neuromuscular adaptations to occur 5 37 . Research attention has recently been placed on monitoring movement velocity during resistance training 4 10 11 12 14 19 20 26 28 29 30 34 35 . Movement velocity is important because both the neuromuscular demands and the training effect itself largely depend on the velocity at which loads are lifted 12 28 .…”

Section: Introductionmentioning

confidence: 99%

Estimation of Relative Load From Bar Velocity in the Full Back Squat Exercise

Sánchez‐Medina

Pallarés

Pérez

et al. 2017

Sports Med Int Open

178

190

View full text Add to dashboard Cite

The use of bar velocity to estimate relative load in the back squat exercise was examined. 80 strength-trained men performed a progressive loading test to determine their one-repetition maximum (1RM) and load-velocity relationship. Mean (MV), mean propulsive (MPV) and peak (PV) velocity measures of the concentric phase were analyzed. Both MV and MPV showed a very close relationship to %1RM (R 2 =0.96), whereas a weaker association (R 2 =0.79) and larger SEE (0.14 vs. 0.06 m·s −1 ) were found for PV. Prediction equations to estimate load from velocity were obtained. When dividing the sample into 3 groups of different relative strength (1RM/body mass), no differences were found between groups for the MPV attained against each %1RM. MV attained with the 1RM was 0.32±0.03 m·s −1 . The propulsive phase accounted for ~82% of concentric duration at 40% 1RM, and progressively increased until reaching 100% at 1RM. Provided that repetitions are performed at maximal intended velocity, a good estimation of load (%1RM) can be obtained from mean velocity as soon as the first repetition is completed. This finding provides an alternative to the often demanding, time-consuming and interfering 1RM or nRM tests and allows implementing a velocity-based resistance training approach.

show abstract

Using Bar Velocity to Predict Maximum Dynamic Strength in the Half-Squat Exercise

Abstract: This equation can be used to predict HS 1-RM on a Smith machine with a high degree of accuracy.

Cited by 72 publications

References 0 publications

Effect of acute exposure to moderate altitude on kinematic variables of the ippon-seoi-nage and its relationship with the countermovement jump in elite judokas

Effect of acute exposure to moderate altitude on kinematic variables of the ippon-seoi-nage and its relationship with the countermovement jump in elite judokas

Effects of velocity loss in the bench press exercise on strength gains, neuromuscular adaptations, and muscle hypertrophy

Estimation of Relative Load From Bar Velocity in the Full Back Squat Exercise

Contact Info

Product

Resources

About