scholarly journals Concurrent Validity and Reliability of the Load-Velocity Relationship to Predict the One-Repetition Maximum during Three Weightlifting Derivatives

Kinesiology ◽  
2021 ◽  
Vol 53 (2) ◽  
pp. 215-225
Author(s):  
Ricardo Berton ◽  
Marcos Soriano ◽  
Demostenys David da Silva ◽  
Marcel Lopes dos Santos ◽  
Gustavo Teixeira ◽  
...  
Keyword(s):  
Measurement Errors ◽  
Concurrent Validity ◽  
Direct Test ◽  
Validity And Reliability ◽  
Repetition Maximum ◽  
Typical Error ◽  
Velocity Relationship ◽  
The One ◽  
Power Clean ◽  
Adequate Reliability

The study investigated the concurrent validity and reliability of the load-velocity relationship to predict the one-repetition maximum (1RM) of the power clean from the knee (PCK), high pull from the knee (HPK), and mid-thigh clean pull (MTCP). For each exercise, 12 participants performed two 1RM sessions tests and two sessions to measure the barbell’s load-velocity relationship at 30, 45, 60, 75, and 90% of 1RM. The velocity recorded at each load was used to establish the linear regression equation and, consequently, to predict 1RM value. A low validity between the 1RM direct test and predicted 1RM was observed for PCK (typical error [TE]=3.96 to 4.50 kg, coefficient of variation [CV]=4.68 to 5.27%, effect size [ES]=-0.76 to -0.58, Bland-Altman bias [BAB]=9.83 to 11.19 kg), HPK (TE=4.58 to 5.82 kg, CV=6.44 to 8.14%, ES=-0.40 to -0.39, BAB=3.52 to 4.17 kg), and MTCP (TE=6.33 to 8.08 kg, CV=4.78 to 6.16%, ES=-0.29 to -0.19, BAB=3.98 to 6.17 kg). Adequate reliability was observed for the 1RM direct test and for the predicted 1RM. However, based on Bland-Altman limits of agreement, lower measurement errors were obtained for the 1RM direct test in comparison to the predicted 1RM for all the exercises. In conclusion, the load-velocity relationship was not able to predict 1RM values with high accuracy in the PCK, HPK, and MTCP. Moreover, the 1RM direct test was the most reliable for PCK, HPK and MTCP.

scholarly journals Where does the One-Repetition Maximum Exist on the Force-Velocity Relationship in Squat?

2017 ◽  
Vol 38 (13) ◽  
pp. 1035-1043 ◽  
Author(s):  
Jean Rivière ◽  
Jérémy Rossi ◽  
Pedro Jimenez-Reyes ◽  
Jean-Benoit Morin ◽  
Pierre Samozino
Keyword(s):  
Lower Limb ◽  
Goodness Of Fit ◽  
Reaction Force ◽  
Squat Jump ◽  
Repetition Maximum ◽  
Velocity Relationship ◽  
Force Velocity ◽  
The Difference ◽  
The One ◽  
The Individual

AbstractThe aim was to determine the position of the one-repetition maximum (1RM) squat point on the force-velocity (F-V) relationship obtained during squat jump (SJ). Ten healthy athletes performed a 1RM squat during which ground reaction force and lower-limb extension velocity were measured, and six loaded SJs to determine individual F-V relationship. The goodness of fit of the linear F-V relationship with or without the 1RM point was tested. The vertical and horizontal coordinates were determined relative to the theoretical maximal force (F0) and the highest loaded SJ (load of 44.5±4.6% 1RM). The goodness of fit of the individual F-V relationship did not differ with or without the 1RM condition, even if the 1RM point was slightly below the curve (−5±5%, P=0.018). The 1RM point can be considered as a point of the F-V relationship. The velocity (0.22±0.05 m.s−1) of the 1RM point corresponded to ~30% of the velocity reached during the highest loaded SJ. The force developed in the 1RM condition was ~16% higher than during the highest loaded SJ and ~11% lower than F0. This finding underlines the difference between F0 and the 1RM condition.

Reliability of the One Repetition-Maximum Power Clean Test in Trained Adolescent Athletes

2011 ◽  
Vol 43 (Suppl 1) ◽  
pp. 665
Author(s):  
Jie Kang ◽  
James E. McFarland ◽  
Avery D. Faigenbaum ◽  
Fernando Naclerio ◽  
Gregory D. Myer ◽  
...  
Keyword(s):  
Maximum Power ◽  
Adolescent Athletes ◽  
Repetition Maximum ◽  
The One ◽  
Power Clean

scholarly journals Validity and Reliability of a Smartphone Accelerometer for Measuring Lift Velocity in Bench-Press Exercises

2020 ◽  
Vol 12 (6) ◽  
pp. 2312
Author(s):  
Javier Peláez Barrajón ◽  
Alejandro F. San Juan
Keyword(s):  
Bench Press ◽  
Basic Program ◽  
Validity And Reliability ◽  
Training Experience ◽  
Mean Velocity ◽  
Repetition Maximum ◽  
Linear Transducer ◽  
The Mean ◽  
One Year ◽  
The One

The aim of this study was to determine the validity and reliability that a smartphone accelerometer (ACC) used by a mobile basic program (MBP) can provide to measure the mean velocity of a bench-press (BP) lift. Ten volunteers participated in the study (age 23.1 ± 2.5 years; mean ± SD). They had more than one year of resistance training experience in BP exercise. All performed three attempts with different loads: 70%, 90%, and 100% of the estimated value of the one-repetition maximum (1RM). In each repetition, the mean velocity was measured by a validated linear transducer and the ACC. The smartphone accelerometer used by the mobile basic program showed no significant differences between the mean velocities at 70% 1RM lifts (ACC = 0.52 ± 0.11 m/s; transducer = 0.54 ± 0.09 m/s, p > 0.05). However, significant differences were found in the mean velocities for 90% 1RM (ACC = 0.46 ± 0.09 m/s; transducer = 0.31 ± 0.03 m/s, p < 0.001), and 100% 1RM (ACC = 0.33 ± 0.21 m/s; transducer = 0.16 ± 0.04 m/s, p < 0.05). The accelerometer is sensitive enough to measure different lift velocities, but the algorithm must be correctly calibrated.

scholarly journals Differences in Kinetics during One- and Two-Leg Hang Power Clean

Sports ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 45
Author(s):  
Ryohei Hayashi ◽  
Takuya Yoshida ◽  
Yasushi Kariyama
Keyword(s):  
Peak Power ◽  
Peak Force ◽  
Time Data ◽  
Repetition Maximum ◽  
Force Development ◽  
Power Peak ◽  
Explosive Force ◽  
Force Time ◽  
The One ◽  
Power Clean

The purpose of this study was to quantify the kinetics per leg during the one- and two-leg hang power clean using various loads. Nine male track and field athletes performed the one- and two-leg hang power clean on a force platform. The estimated one-repetition maximum was used for the one-leg hang power clean (OHPC), and the one-repetition maximum was used for the two-leg hang power clean (THPC). The loads used were 30%, 60%, and 90% during both trials. We calculated peak power, peak force, and peak rate of force development during the pull phase from the force-time data. The peak power and the peak force for all loads during the OHPC were statistically greater than during the THPC. The peak rates of force development at 60% and 90% during the OHPC were statistically greater than during the THPC. Additionally, the peak power at 90% was significantly less than at 60% during the THPC. These findings suggest that the OHPC at loads of 60% and 90% is a weightlifting exercise that exhibits greater explosive force and power development characteristics than the THPC.

scholarly journals Reliability of the One-Repetition-Maximum Power Clean Test in Adolescent Athletes

2012 ◽  
Vol 26 (2) ◽  
pp. 432-437 ◽  
Author(s):  
Avery D Faigenbaum ◽  
James E McFarland ◽  
Robert E Herman ◽  
Fernando Naclerio ◽  
Nicholas A Ratamess ◽  
...  
Keyword(s):  
Maximum Power ◽  
Adolescent Athletes ◽  
Repetition Maximum ◽  
The One ◽  
Power Clean

Reliability and validity of the masculine subordination stress scale in a rural Bangladesh sample

2014 ◽  
Vol 34 (1/2) ◽  
pp. 133-148
Author(s):  
K.M. Rabiul Karim
Keyword(s):  
Concurrent Validity ◽  
Empirical Support ◽  
Reliability And Validity ◽  
Validity And Reliability ◽  
Content Type ◽  
Stress Scale ◽  
Rural Bangladesh ◽  
Married Men ◽  
Valid Instrument ◽  
Adequate Reliability

Purpose – The purpose of this study was to examine the reliability and validity of the masculine subordination stress (MSS) scale in a rural Bangladesh population. Design/methodology/approach – The scale was validated using a sample of 342 Bangladeshi married men from five northwest villages of the country. Findings – Exploratory factor analysis revealed a single-factorial structure of the scale: MSS. The MSS also showed adequate reliability and concurrent validity. It appears that the MSS is a reliable and valid instrument to measure MSS for rural Bangladeshi men. Originality/value – The current study provides empirical support for the validity and reliability of the MSS in the rural Bangladesh context. Academicians and researchers who are seeking an instrument to assess masculine subordination-to-women stress may find it useful. Moreover, it may stimulate researchers to think about strategies for helping men to cope up with masculine stress from a positive viewpoint. It may also help practitioners to improve men's mental health at different settings.

Validity and Reliability of a Standardized Protocol for Assessing the One Repetition Maximum Performance During Overhead Pressing Exercises

2020 ◽  
Vol Publish Ahead of Print ◽  
Author(s):  
Marcos A. Soriano ◽  
Amador García-Ramos ◽  
Antonio Torres-González ◽  
Joaquín Castillo-Palencia ◽  
Víctor Ayuso ◽  
...  
Keyword(s):  
Validity And Reliability ◽  
Maximum Performance ◽  
Repetition Maximum ◽  
Standardized Protocol ◽  
The One

scholarly journals Validity and Reliability of a Jordanian Version of the Adaptive Behavior Assessment System (ABAS-II) in Identifying Adaptive Behavior Deficits among Disabled Individuals in Jordan

2015 ◽  
Vol 9 (2) ◽  
pp. 248
Author(s):  
Safa M. AlAli ◽  
Jameal M. Al Smady
Keyword(s):  
Adaptive Behavior ◽  
Concurrent Validity ◽  
Assessment System ◽  
Behavior Assessment ◽  
Disabled Children ◽  
Validity And Reliability ◽  
Alpha Coefficient ◽  
Behavior Skills ◽  
Adaptive Behavior Assessment System ◽  
The One

The purpose of this study was to investigate the validity and the reliability of the Jordanian version of the Adaptive Behavior Assessment System (ABAS-11, 2003) in detecting the manifestations of the deficit in adaptive behavior skills of performance on the teacher form, in Jordan. The sample of this study consisted of 200 normal students. Also, another 200 disabled children participated in the study. To achieve the aim of this study an Arabic version of teacher form was prepared (ABAS-II) in its second version. It was refereed by a group of specialists where their agreement reached 80%, thus resulting in 136 items distributed over 9 domains. Indication of concurrent validity in the Jordanian version was calculated as it was correlated with the one prepared by Al-Kilani and Al-batsh (1981) (r = 0.86). The reliability of the Jordanian version was investigated through test re-retest (0.92) and alpha coefficient (0.98).

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