TY - JOUR
T1 - Changes in Cost of Locomotion Are Higher after Endurance Cycling Than Running When Matched for Intensity and Duration
AU - Sabater-Pastor, Frederic
AU - Faricier, Robin
AU - Metra, Mélanie
AU - Murias, Juan M.
AU - Brownstein, Callum G.
AU - Millet, Guillaume Y.
N1 - Publisher Copyright:
© Lippincott Williams & Wilkins.
PY - 2023/3/1
Y1 - 2023/3/1
N2 - IntroductionCost of locomotion (C-L) has been shown to increase after endurance running and cycling bouts. The main purpose of this study was to compare, in the same participants, the effect of both modalities on C-L when matched for relative intensity and duration.MethodsSeventeen recreational athletes performed two incremental tests in running and cycling to determine the first ventilatory threshold then two 3-h bouts of exercise at 105% of threshold, with gas exchange measurements taken for 10 min at the start, middle and end of the 3 h to calculate C-L. Neuromuscular fatigue during isometric knee extensor contractions and force-velocity profile on a cycle ergometer were assessed before and immediately after the 3-h trials.ResultsC(L) significantly increased at mid (+3.7%, P = 0.006) and end (+7.4%, P < 0.001) of exercise for cycling compared with start, whereas it did not change with time for running. Cardio-respiratory and metabolic variables changed similarly for cycling and running, therefore not explaining the time-course differences in C-L between modalities. Changes in C-L during cycling correlated significantly with loss of maximal force extrapolated from the force-velocity profile (r = 0.637, P = 0.006) and changes in cadence (r = 0.784, P < 0.001).ConclusionsThe type of locomotion influences the effects of exercise on energy cost because 3 h of exercise at the same relative intensity caused a significant increase of cycling C-L, and no changes in running C-L. The changes in C-L in cycling are likely due, at least in part, to fatigue in the locomotor muscles.
AB - IntroductionCost of locomotion (C-L) has been shown to increase after endurance running and cycling bouts. The main purpose of this study was to compare, in the same participants, the effect of both modalities on C-L when matched for relative intensity and duration.MethodsSeventeen recreational athletes performed two incremental tests in running and cycling to determine the first ventilatory threshold then two 3-h bouts of exercise at 105% of threshold, with gas exchange measurements taken for 10 min at the start, middle and end of the 3 h to calculate C-L. Neuromuscular fatigue during isometric knee extensor contractions and force-velocity profile on a cycle ergometer were assessed before and immediately after the 3-h trials.ResultsC(L) significantly increased at mid (+3.7%, P = 0.006) and end (+7.4%, P < 0.001) of exercise for cycling compared with start, whereas it did not change with time for running. Cardio-respiratory and metabolic variables changed similarly for cycling and running, therefore not explaining the time-course differences in C-L between modalities. Changes in C-L during cycling correlated significantly with loss of maximal force extrapolated from the force-velocity profile (r = 0.637, P = 0.006) and changes in cadence (r = 0.784, P < 0.001).ConclusionsThe type of locomotion influences the effects of exercise on energy cost because 3 h of exercise at the same relative intensity caused a significant increase of cycling C-L, and no changes in running C-L. The changes in C-L in cycling are likely due, at least in part, to fatigue in the locomotor muscles.
KW - Cycling efficiency
KW - Endurance exercise
KW - Fatigue
KW - Running economy
UR - http://www.scopus.com/inward/record.url?scp=85148113869&partnerID=8YFLogxK
U2 - 10.1249/MSS.0000000000003059
DO - 10.1249/MSS.0000000000003059
M3 - Article
C2 - 36251372
AN - SCOPUS:85148113869
SN - 0195-9131
VL - 55
SP - 389
EP - 397
JO - Medicine and Science in Sports and Exercise
JF - Medicine and Science in Sports and Exercise
IS - 3
ER -