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The Influence of Age, Gender, and Training on Exercise Efficiency

J. Susie Woo, MD^_*, Christina Derleth, MD^_*, John R. Stratton, MD, FACC^, and Wayne C. Levy, MD, FACC^,_*

^_* Department of Internal Medicine, University of Washington, Seattle, Washington
Department of Cardiology, University of Washington, Seattle, Washington
Department of Cardiology, Veterans Affairs Puget Sound Health Care System, Seattle, Washington

View larger version (21K): [in a new window]   Figure 1 The young (n = 27) showed no change in efficiency, whereas the older subjects (n = 34) showed a 30% increase in efficiency with exercise training.

View larger version (86K): [in a new window]   Figure 2 With exercise training, the elderly subjects showed a greater relative increase in exercise efficiency than their younger counterparts, for both total maximal workload (p < 0.0001 for age x training effect), and for a matched submaximal workload of walking at 3.5 mph at 0 grade for 2 min (p = 0.059).