Archives Internationales de Physiologie, de Biochimie et de Biophysique, 1991, 99, 297-301
297
R e q le 15 dkcembre 1990.
Lactate steady state velocity and distance-exhaustion time relationship in running BY
B. SID-ALI Archives of Physiology and Biochemistry Downloaded from informahealthcare.com by University of North Carolina on 11/13/14 For personal use only.
[(I)
c), H. VANDEWALLE
(I),
K. CHAIR, A. MOREAUX
e)and H. MONOD (')
Laboratoire de physiologie de la motricitk - URA CNRS 385, C.H. U. Pitik-Sal@tri&re,Paris; (') Institut National des Sports et de I'Education Physique, Paris].
(5 figures)
The relationship between distance and exhaustion time is linear for running exercise at constant velocity lasting 5 to 45 minutes. The slope of this relationship has the dimension of a velocity (VcRm)which can be sustained during a long time. The individual V,,, have been studied in 8 runners by measuring exhaustion time for 4 to 5 constant-velocity running exercises performed to exhaustion. The velocity correshas been estimated according to a two-step protocol proposed pond to a lactate steady state (Vc,,) by Chassain for exercises on a cycle ergometer. The running velocity corresponding to maximal aerobic R BOUCHER. VCRiT metabolism ( V L E G E d was estimated by means of the track test proposed by L ~ G E and was very well correlated (r>0.97) and almost equal to V,,,A,,. VLEGER was also very well correlated with V, and V,,,.
Introduction The relationship between distance and world record 1966; ZATSIORSICIIet al., is roughly linear (ETTEMA, 1982) for distances lying between 1500 and loo00 m. Energy required for a given distance depends on body weight and is approximately independent of velocity et al., 1%3; LEGER& MERup to 22 km.h-' (MARGAFUA CER, 1983). Consequently, running distance is equivalent to a work. The relationship between distance (1500 to 5000 m) and exhaustion time (tlim) can be com& MONOD, pared to the linear relationship (SCHERRER 1960) between the work W (), performed at the end of constant power exhausting exercises and exhaustion time (tlim)(ETTEMA,1966) : W, = a + b.t,, where a has the dimension of an anaerobic energy store and b the dimension of a power which can be maintained for a very long time. In the case of running, parameter b has the dimension of a velocity (VCRIT) which can be maintained during a long time. The power corresponding to 4 m~ of lactate in blood is sometime considered as a criterion of aerobic capacity because this power can generally be sustained during a long time (HECKet al., 1985) and significant relationships between V m~ and running performances have been found (see JACOBS,1986). We assumet al., 1989) that ed in a previous study (LECHEVALER V c R I T should be correlated with V 4nua and that VcRIT might be an indirect estimation of V -. This hypothesis was verified as V 4 m y was very well correlated to VCNT(r = 0.904; n = 31; P
297
R e q le 15 dkcembre 1990.
Lactate steady state velocity and distance-exhaustion time relationship in running BY
B. SID-ALI Archives of Physiology and Biochemistry Downloaded from informahealthcare.com by University of North Carolina on 11/13/14 For personal use only.
[(I)
c), H. VANDEWALLE
(I),
K. CHAIR, A. MOREAUX
e)and H. MONOD (')
Laboratoire de physiologie de la motricitk - URA CNRS 385, C.H. U. Pitik-Sal@tri&re,Paris; (') Institut National des Sports et de I'Education Physique, Paris].
(5 figures)
The relationship between distance and exhaustion time is linear for running exercise at constant velocity lasting 5 to 45 minutes. The slope of this relationship has the dimension of a velocity (VcRm)which can be sustained during a long time. The individual V,,, have been studied in 8 runners by measuring exhaustion time for 4 to 5 constant-velocity running exercises performed to exhaustion. The velocity correshas been estimated according to a two-step protocol proposed pond to a lactate steady state (Vc,,) by Chassain for exercises on a cycle ergometer. The running velocity corresponding to maximal aerobic R BOUCHER. VCRiT metabolism ( V L E G E d was estimated by means of the track test proposed by L ~ G E and was very well correlated (r>0.97) and almost equal to V,,,A,,. VLEGER was also very well correlated with V, and V,,,.
Introduction The relationship between distance and world record 1966; ZATSIORSICIIet al., is roughly linear (ETTEMA, 1982) for distances lying between 1500 and loo00 m. Energy required for a given distance depends on body weight and is approximately independent of velocity et al., 1%3; LEGER& MERup to 22 km.h-' (MARGAFUA CER, 1983). Consequently, running distance is equivalent to a work. The relationship between distance (1500 to 5000 m) and exhaustion time (tlim) can be com& MONOD, pared to the linear relationship (SCHERRER 1960) between the work W (), performed at the end of constant power exhausting exercises and exhaustion time (tlim)(ETTEMA,1966) : W, = a + b.t,, where a has the dimension of an anaerobic energy store and b the dimension of a power which can be maintained for a very long time. In the case of running, parameter b has the dimension of a velocity (VCRIT) which can be maintained during a long time. The power corresponding to 4 m~ of lactate in blood is sometime considered as a criterion of aerobic capacity because this power can generally be sustained during a long time (HECKet al., 1985) and significant relationships between V m~ and running performances have been found (see JACOBS,1986). We assumet al., 1989) that ed in a previous study (LECHEVALER V c R I T should be correlated with V 4nua and that VcRIT might be an indirect estimation of V -. This hypothesis was verified as V 4 m y was very well correlated to VCNT(r = 0.904; n = 31; P
