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

Jean Romain Rivière; Jérémy Rossi; Pedro Jimenez-Reyes; Jean-Benoit Morin; Pierre Samozino

doi:10.1055/s-0043-116670

International Journal of Sports Medicine, Table of Contents

Int J Sports Med 2017; 38(13): 1035-1043
DOI: 10.1055/s-0043-116670

Orthopedics & Biomechanics

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

Jean Romain Rivière

¹University Savoie Mont Blanc, Laboratoire Interuniversitaire de Biologie de la Motricité, EA 7424, F-73000 Chambéry, France

,

Jérémy Rossi

²Univ Lyon, UJM-Saint-Etienne, Laboratoire Interuniversitaire de Biologie de la Motricité, EA 7424, F-42023 Saint-Etienne, France

,

Pedro Jimenez-Reyes

³Physical Activity and Sports Science, Catholic University of San Antonio, Murcia, Spain

,

Jean-Benoit Morin

⁴Université Côte d’Azur, LAMHESS, Nice, France

,

Pierre Samozino

¹University Savoie Mont Blanc, Laboratoire Interuniversitaire de Biologie de la Motricité, EA 7424, F-73000 Chambéry, France

› Author Affiliations

Abstract

The 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.

Key words

squat jump - maximal force capacities - ballistic movements - 1RM

Full Text

References

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