title: Uphill running at iso-efficiency speed.
abstract: The purpose of this study was to investigate the effects of slopes (0%, 2% and 7%) on temporal gait kinematics during running at iso-efficiency speed (IES). 65 male marathon runners were selected for this study. A single digital camera (210 Hz) was used to record motion; Dartfish5.5Pro was used to perform 2-dimensional (2D) video analysis and heart rate was recorded during the test. The parameters considered in this study were: step length (SL), flight time (FT), step frequency (SF), contact time (CT) and heart rate (HR). The results showed SL, FT and SF decreased as a result of the increasing treadmill gradient; SL=[(0-2%=8.38%, p<0.0001), (0-7%=23.61%, p<0.0001)]; FT=[(0-2%=8.92%, p<0.02), (0-7%=23.40%, p<0.0001)]; SF=[(0-2%=1.18%), (0-7%=4.02%, p<0.001)]. The CT and HR however increased with the increasing gradient CT=[(0-2%=9.06% p<0.0001), (0-7%=25.64%, p<0.0001)]; HR=[(0-2%=1.65%), (0-7%=3.58%)]. These results show a different trend of the footstep's kinematic parameters when running on a slope at IES. Moreover, we can calculate the optimal run speed on a slope without increasing the metabolic demand.
authors.affiliation: Faculty of Medicine and Surgery, University of Rome Tor Vergata, Rome, Italy. sportcinetic@yahoo.it
authors.forename: J
authors.initials: J
authors.lastname: Padulo
authors.forename: G
authors.initials: G
authors.lastname: Annino
authors.forename: L
authors.initials: L
authors.lastname: Smith
authors.forename: G M
authors.initials: GM
authors.lastname: Migliaccio
authors.forename: R
authors.initials: R
authors.lastname: Camino
authors.forename: J
authors.initials: J
authors.lastname: Tihanyi
authors.forename: S
authors.initials: S
authors.lastname: D'Ottavio
mesh_terms: D000328:Adult; D001696:Biomechanical Phenomena / Q000502:physiology; D005080:Exercise Test; D005684:Gait / Q000502:physiology; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D008297:Male; D012420:Running / Q000502:physiology*; D014741:Video Recording; D055815:Young Adult