TY - JOUR
T1 - No gender-specific differences in mechanical efficiency during arm or leg exercise relative to ventilatory threshold
AU - Yasuda, N.
AU - Gaskill, S. E.
AU - Ruby, B. C.
PY - 2008/4
Y1 - 2008/4
N2 - The purpose of this study was to determine economy and mechanical efficiency in men and women during both arm cranking (AC) and leg cycling (LC) at 70%, 85%, 100%, and 115% of mode-specific ventilatory threshold (T vent). Recreationally active men (n=9) and women (n=9) with similar values for %V̇O2peak at Tvent served as subjects. All subjects performed 5 min of exercise at each intensity of 70%, 85%, 100%, and 115% of Tvent for both AC and LC. Economy was expressed as W/L/min. Gross efficiency (GE) was determined as the ratio of work accomplished to total energy expended (%). Delta efficiency (DE) was determined as the ratio of delta work accomplished to delta energy expended (%). Economy and efficiency during LC were greater than during AC in men and women. During AC or LC exercise, no sex differences were found in either economy (P=0.93 for AC, 0.98 for LC), GE (P=0.88 for AC, 0.75 for LC), or DE (P=0.57 for AC, 0.51 for LC). These findings indicate that men and women show similar economy and efficiency during both AC and LC exercise when subjects have similar %V̇O2peak at T vent.
AB - The purpose of this study was to determine economy and mechanical efficiency in men and women during both arm cranking (AC) and leg cycling (LC) at 70%, 85%, 100%, and 115% of mode-specific ventilatory threshold (T vent). Recreationally active men (n=9) and women (n=9) with similar values for %V̇O2peak at Tvent served as subjects. All subjects performed 5 min of exercise at each intensity of 70%, 85%, 100%, and 115% of Tvent for both AC and LC. Economy was expressed as W/L/min. Gross efficiency (GE) was determined as the ratio of work accomplished to total energy expended (%). Delta efficiency (DE) was determined as the ratio of delta work accomplished to delta energy expended (%). Economy and efficiency during LC were greater than during AC in men and women. During AC or LC exercise, no sex differences were found in either economy (P=0.93 for AC, 0.98 for LC), GE (P=0.88 for AC, 0.75 for LC), or DE (P=0.57 for AC, 0.51 for LC). These findings indicate that men and women show similar economy and efficiency during both AC and LC exercise when subjects have similar %V̇O2peak at T vent.
KW - Anaerobic threshold
KW - Endurance performance
KW - Muscle mass
KW - Relative intensity
KW - Sex-based differences
UR - http://www.scopus.com/inward/record.url?scp=41149085677&partnerID=8YFLogxK
U2 - 10.1111/j.1600-0838.2007.00637.x
DO - 10.1111/j.1600-0838.2007.00637.x
M3 - Article
C2 - 17490463
AN - SCOPUS:41149085677
SN - 0905-7188
VL - 18
SP - 205
EP - 212
JO - Scandinavian Journal of Medicine and Science in Sports
JF - Scandinavian Journal of Medicine and Science in Sports
IS - 2
ER -