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Kinematic, Cardiopulmonary, and Metabolic Responses of Overweight Runners While Running at Self‐Selected and Standardized Speeds
Author(s) -
Zdziarski Laura Ann,
Chen Cong,
Horodyski Marybeth,
Vincent Kevin R.,
Vincent Heather K.
Publication year - 2016
Publication title -
pmandr
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.617
H-Index - 66
eISSN - 1934-1563
pISSN - 1934-1482
DOI - 10.1016/j.pmrj.2015.06.441
Subject(s) - overweight , cadence , medicine , sagittal plane , kinematics , physical therapy , pelvic tilt , preferred walking speed , physical medicine and rehabilitation , body mass index , physics , classical mechanics , radiology
Objective To determine the differences in kinematic, cardiopulmonary, and metabolic responses between overweight and healthy weight runners at a self‐selected and standard running speed. Design Comparative descriptive study. Setting Tertiary care institution, university‐affiliated research laboratory. Participants Overweight runners (n = 21) were matched with runners of healthy weight (n = 42). Methods Participants ran at self‐selected and standardized speeds (13.6 km/h). Sagittal plane joint kinematics were captured simultaneously with cardiopulmonary and metabolic measures using a motion capture system and portable gas analyzer, respectively. Main Outcome Measurements Spatiotemporal parameters (cadence, step width and length, center of gravity displacement, stance time) joint kinematics, oxygen cost, heart rate, ventilation and energy expenditure. Results At the self‐selected speed, overweight individuals ran slower (8.5 ± 1.3 versus 10.0 ± 1.6 km/h) and had slower cadence (163 versus 169 steps/min; P < .05). The sagittal plane range of motion (ROM) for flexion‐extension at the ankle, knee, hip, and anterior pelvic tilt were all less in overweight runners compared to healthy weight runners (all P < .05). At self‐selected speed and 13.6 km/h, energy expenditure was higher in the overweight runners compared to their healthy weight counterparts ( P < .05). At 13.6 km/h, only the frontal hip and pelvis ROM were higher in the overweight versus the healthy weight runners ( P < .05), and energy expenditure, net energy cost, and minute ventilation were higher in the overweight runners compared to the healthy weight runners ( P < .05). Conclusion At self‐selected running speeds, the overweight runners demonstrated gait strategies (less joint ROM, less vertical displacement, and shorter step lengths) that resulted in cardiopulmonary and energetic responses similar to those of healthy weight individuals.