Pietro Picerno1, Danilo Iannetta2, Stefania Comotto2, Marco Donati3, Fabrizio Pecoraro4, Mounir Zok5, Giorgio Tollis6, Marco Figura3, Carlo Varalda7, Davide Di Muzio2, Federica Patrizio2, Maria Francesca Piacentini2. 1. Faculty of Psychology, School of Sport and Exercise Sciences, 'eCampus' University, Via Isimbardi 10, 22060, Novedrate CO, Italy. pietro.picerno@uniecampus.it. 2. Department of Movement, Human and Health Sciences, University of Rome 'Foro Italico', Rome, Italy. 3. , Rome, Italy. 4. Institute for Research on Population and Social Policies, National Research Council, Rome, Italy. 5. United States Olympic Committee, Colorado, USA. 6. Faculty of Psychology, School of Sport and Exercise Sciences, 'eCampus' University, Via Isimbardi 10, 22060, Novedrate CO, Italy. 7. Italian Weightlifting Federation, Rome, Italy.
Abstract
PURPOSE: This study aimed to evaluate the accuracy of a novel approach for predicting the one-repetition maximum (1RM). The prediction is based on the force-velocity and load-velocity relationships determined from measured force and velocity data collected during resistance-training exercises with incremental submaximal loads. 1RM was determined as the load corresponding to the intersection of these two curves, where the gravitational force exceeds the force that the subject can exert. METHODS: The proposed force-velocity-based method (FVM) was tested on 37 participants (23.9 ± 3.1 year; BMI 23.44 ± 2.45) with no specific resistance-training experience, and the predicted 1RM was compared to that achieved using a direct method (DM) in chest-press (CP) and leg-press (LP) exercises. RESULTS: The mean 1RM in CP was 99.5 kg (±27.0) for DM and 100.8 kg (±27.2) for FVM (SEE = 1.2 kg), whereas the mean 1RM in LP was 249.3 kg (±60.2) for DM and 251.1 kg (±60.3) for FVM (SEE = 2.1 kg). A high correlation was found between the two methods for both CP and LP exercises (0.999, p < 0.001). Good agreement between the two methods emerged from the Bland and Altman plot analysis. CONCLUSION: These findings suggest the use of the proposed methodology as a valid alternative to other indirect approaches for 1RM prediction. The mathematical construct is simply based on the definition of the 1RM, and it is fed with subject's muscle strength capacities measured during a specific exercise. Its reliability is, thus, expected to be not affected by those factors that typically jeopardize regression-based approaches.
PURPOSE: This study aimed to evaluate the accuracy of a novel approach for predicting the one-repetition maximum (1RM). The prediction is based on the force-velocity and load-velocity relationships determined from measured force and velocity data collected during resistance-training exercises with incremental submaximal loads. 1RM was determined as the load corresponding to the intersection of these two curves, where the gravitational force exceeds the force that the subject can exert. METHODS: The proposed force-velocity-based method (FVM) was tested on 37 participants (23.9 ± 3.1 year; BMI 23.44 ± 2.45) with no specific resistance-training experience, and the predicted 1RM was compared to that achieved using a direct method (DM) in chest-press (CP) and leg-press (LP) exercises. RESULTS: The mean 1RM in CP was 99.5 kg (±27.0) for DM and 100.8 kg (±27.2) for FVM (SEE = 1.2 kg), whereas the mean 1RM in LP was 249.3 kg (±60.2) for DM and 251.1 kg (±60.3) for FVM (SEE = 2.1 kg). A high correlation was found between the two methods for both CP and LP exercises (0.999, p < 0.001). Good agreement between the two methods emerged from the Bland and Altman plot analysis. CONCLUSION: These findings suggest the use of the proposed methodology as a valid alternative to other indirect approaches for 1RM prediction. The mathematical construct is simply based on the definition of the 1RM, and it is fed with subject's muscle strength capacities measured during a specific exercise. Its reliability is, thus, expected to be not affected by those factors that typically jeopardize regression-based approaches.
Entities:
Keywords:
Force–velocity relationship; Muscle strength assessment; One-repetition maximum; Resistance training
Authors: M Izquierdo; J J González-Badillo; K Häkkinen; J Ibáñez; W J Kraemer; A Altadill; J Eslava; E M Gorostiaga Journal: Int J Sports Med Date: 2006-09 Impact factor: 3.118
Authors: Carlos Balsalobre-Fernández; David Marchante; Eneko Baz-Valle; Iván Alonso-Molero; Sergio L Jiménez; Mario Muñóz-López Journal: Front Physiol Date: 2017-08-28 Impact factor: 4.566