Temperature and force-velocity relationship of human muscles

Abstract

The force-velocity relationship of maximal contractions with the handgrip muscles is established in a group of subjects. The effect of different muscle temperatures is studied. The parameters vo (maximal velocity), Fo (maximal force), Pmax (maximal power), a/Fo and H (both parameters describing the shape of the curve), and Ft/Fo (the value of the force at which power is maximal) are established. It is shown that 1) in repeated measurements the coefficient of variation in general is less than 10% for all the parameters except a/Fo; 2) the parameter a/Fo should be discarded in comparative measurements since it is not linearly related to the course of the curve. A parameter called H should be used instead to describe the curvature; 3) an increase in muscle temperature is accompanied by an increase in magnitude of all parameters except Fo. The temperature effect expressed as Q10 in the range 22-38 degrees C is in the order of 1.2.

Impacts of temperature on performance in two species of South African dwarf chameleons,Bradypodion pumilumandB. occidentale

“…The maximal summer temperature predicted (32.5°C) 3834 speed-related traits are highly temperature dependent whereas forcerelated traits are less dependent on temperature. These different performance trait profiles are consistent with studies on the influence of temperature on muscle function (Bennett, 1980;Bergh and Ekblom, 1979;Binkhorst et al, 1977;Petrofsky et al, 1981;Anderson and Deban, 2012) and whole-organism performance (Herrel et al, 2007;Anderson and Deban, 2010). Furthermore, most of the differences found in the comparison of force-related traits involved temperatures under 25°C, whereas temperature independence of force generation by muscle is known to range from 25 to 40°C (Bergh and Ekblom, 1979;Binkhorst et al, 1977;Petrofsky et al, 1981).…”

“…The specific aim of this study was to determine the temperature dependence of selected performance traits (bite force, hand and tail force, and sprint speed) for each species. We predicted that speed-related performance traits should be highly temperature dependent (Bennett, 1980), yet force-related performance should be less temperature dependent (Bergh and Ekblom, 1979;Binkhorst et al, 1977;Herrel et al, 2007;Petrofsky et al, 1981), thus differentially affecting behavior. These predictions are based on previous results (e.g.…”

Effect of Linear Polarized Near-infrared Light Irradiation and Light Exercise on Muscle Performance

“…temperature decreases muscle stiffness and improves the forcevelocity relationship (Binkhorst et al, 1977;Bishop, 2003b;Febbraio et al, 1996;Ranatunga et al, 1987). Moreover, French et al (2003) suggested that a warm-up including a heavy load may induce a high-frequency stimulation of motor neurons and enhance motor neuron excitability.…”

Precooling and Warm-up Effects on Time Trial Cycling Performance During Heat Stress

“…For instance, increases in body and muscle temperatures following a warm-up are thought to increase nerve impulse transmission, and hence increase muscular contraction speed (Woods et al, 2007). Increasing muscle temperature was accompanied with elevation in maximal velocity, maximal power, and an improvement in the force-velocity relationship (Binkhorst et al, 1977). Also, warm-up-induced elevated muscle temp 2max resulted in greater ATP and inosine 5`-monophosphate degradation during exercise, lower post-exercise muscle glycogen content, and higher post-exercise lactate concentration, indicating elevation in glycogenolysis, glycolysis, and high energy phosphate degradation (Febbraio et al, 1996) O 2max , one leg was heated and the other was cooled prior to and during exercise using water-perfused cuffs.…”

“…Such muscle function includes twitch tension, maximal force, and rate and velocity of muscle contraction, all of which have been reported to decrease with reduced local temperature (Binkhorst et al, 1977;Sargeant, 1987;Ranatunga et al, 1987;Bigland-Ritchie et al, 1992;Racinais & Oksa, 2010;Cheuvront et al, 2010).…”