Figure 5From: Oxygen uptake, heart rate, perceived exertion, and integrated electromyogram of the lower and upper extremities during level and Nordic walking on a treadmillComparison of perceived exertion (OMNI scale) for Nordic walking (NW) and level walking (LW). (A) Upper extremities, (B) Lower extremities, (C) Whole body. *P < 0.05, **P < 0.01, ***P < 0.001.Back to article page