Open AccessConcurrent Validity and Reliability of the Load-Velocity Relationship to Predict the One-Repetition Maximum during Three Weightlifting Derivatives
Author(s) -
Ricardo Berton,
Marcos Soriano,
Demostenys David da Silva,
Marcel Lopes dos Santos,
Gustavo C. Teixeira,
Fernando Carvalheiro Reiser,
Valmor Tricoli
Publication year - 2021
Publication title -
kinesiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 21
eISSN - 1848-638X
pISSN - 1331-1441
DOI - 10.26582/k.53.2.4
Subject(s) - concurrent validity , reliability (semiconductor) , one repetition maximum , mathematics , limits of agreement , linear regression , statistics , physical therapy , medicine , muscle strength , nuclear medicine , physics , power (physics) , quantum mechanics , internal consistency , psychometrics
The study investigated theconcurrent validity and reliability of the load-velocity relationship topredict the one-repetition maximum (1RM) of the power clean from the knee (PCK), high pull from the knee (HPK), andmid-thigh clean pull (MTCP). For each exercise, 12 participants performed two1RM sessions tests and two sessions to measure the barbell’s load-velocityrelationship at 30, 45, 60, 75, and 90% of 1RM. The velocity recorded at eachload was used to establish the linear regression equation and, consequently, topredict 1RM value. A low validity between the 1RM direct test and predicted 1RMwas observed for PCK (typical error [TE]=3.96 to 4.50 kg, coefficient ofvariation [CV]=4.68 to 5.27%, effect size [ES]=-0.76 to -0.58, Bland-Altmanbias [BAB]=9.83 to 11.19 kg), HPK (TE=4.58 to 5.82 kg, CV=6.44 to 8.14%, ES=-0.40to -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 forthe 1RM direct test and for the predicted 1RM. However, based on Bland-Altmanlimits of agreement, lower measurement errors were obtained for the 1RM directtest in comparison to the predicted 1RM for all the exercises. In conclusion,the load-velocity relationship was not able to predict 1RM values with highaccuracy in the PCK, HPK, and MTCP. Moreover, the 1RM direct test was the mostreliable for PCK, HPK and MTCP.