Bench press 1-repetition maximum estimation through the individualized load-velocity relationship : Comparison of different regression models and minimal velocity thresholds
| Autor: | Ivan Jukic, Amador García-Ramos, Jonathon Weakley, Danica Janicijevic |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Male
Weight Lifting based training Repetition maximum Physical Therapy Sports Therapy and Rehabilitation Bench press Linear methods 03 medical and health sciences 0302 clinical medicine Linear regression Statistics Range (statistics) Humans Orthopedics and Sports Medicine linear position transducer Muscle Strength maximum dynamic strength Exercise 030304 developmental biology Mathematics 2-point method Polynomial regression 0303 health sciences Resistance Training Regression analysis 030229 sport sciences multiple-point method Standard error Linear Models Female |
| Popis: | Purpose: To compare the accuracy of nine 1-repetition maximum (1RM) prediction methods during the paused and touch-and-go bench press exercises performed in a Smith machine. Method: A total of 86 men performed 2 identical sessions (incremental loading test until reaching the 1RM followed by a set to failure) in a randomized order during the paused and touch-and-go bench press exercises. Individualized load–velocity relationships were modeled by linear and polynomial regression models considering 4 loads (45%–60%–75%–90% of 1RM) (multiple-point methods) and considering only 2 loads (45%–90% of 1RM) by a linear regression (2-point method). Three minimal velocity thresholds were used: the general velocity of 0.17 m·s−1 (general velocity of the 1RM [V1RM]), the velocity obtained when lifting the 1RM load (individual V1RM), and the velocity obtained during the last repetition of a set to failure. Results: The 1RM prediction methods were generally valid (range: r = .96–.99, standard error of the estimate = 2.8–4.9 kg or 4.6%–8.0% of 1RM). The multiple-point linear method (2.79 [2.29] kg) was more precise than the multiple-point polynomial method (3.54 [3.31] kg; P = .013), but no significant differences were observed when compared with the 2-point method (3.09 [2.66] kg, P = .136). The velocity of the last repetition of a set to failure (3.47 [2.97] kg) was significantly less precise than the individual V1RM (2.91 [2.75] kg, P = .009) and general V1RM (3.00 [2.65] kg, P = .010). Conclusions: Linear regression models and a general minimal velocity threshold of 0.17 m·s−1 should be recommended to obtain a quick and precise estimation of the 1RM during the bench press exercise performed in a Smith machine. |
| Databáze: | OpenAIRE |
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