Affiliations: [a] LUNAM Université, Université du Maine,
Laboratoire "Motricité, Interactions", Le Mans Cedex, France | [b] Centre de l'Arche, Pôle Régional
Spécialisé en Médecine Physique et Réadaptation, Saint
Saturnin, France
Note: [] Corresponding author: A. Lemaire, LUNAM Université,
Université du Maine, Laboratoire "Motricité, Interactions,
Performance" EA4334, Avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France.
Tel.: +33 0662314827; E-mail: [email protected]
Abstract: BACKGROUND: Torque and power-velocity relationships obtained
during isokinetic evaluation can be useful for rehabilitation program.
Nevertheless, their determination requires a substantial number of measures
using different velocities, inducing time-consuming protocols. OBJECTIVE: The aim of the present study was to assess the agreement between
a short isokinetic protocol, including three angular velocities (P_{3}) and a
longer one including eight angular velocities (P_{8}). METHODS: Sixteen healthy male subjects performed isokinetic knee extensions at several
preset velocities during two protocols. The first included eight velocities
ranging from 60 to 270°/s (P_{8}), whereas the second (P_{3})
consisted of three velocities (90, 180 and 240°/s). Mechanical
parameters: theoretical maximal isometric torque T_{0}, theoretical maximal
velocity V_{0}, and maximal power P_{max}, were extrapolated from torque-
and power-velocity relationships for both P_{8} and P_{3}. RESULTS: The torque- and power velocity relationships drawn from each protocol were in
agreement since no significant differences were found for either each
extrapolated mechanical parameters, between the slopes of the torque-velocity
relationships, or between the polynomial regression coefficients of the
power-velocity relationships resulting from P_{8} and P_{3}. CONCLUSION: The agreement between the short and long protocols allows
reduction of fatigue and loss of motivation that may occur during full
velocities testing particularly during rehabilitation program.
Keywords: Protocols agreement, mechanical parameters, torque and power-velocity relationships
