The initial cadence of movement on land was lower than in water since in water two external forces influence the body: downward weight and upward buoyancy. Thus, the perceived weight in water environment (hydrostatic weight) is reduced due to simple vector sum. Less muscle recruitment is then required to maintain the body position in water and consequently the exercise can be endured for longer (Alberton et al., 2013b). In both stationary running protocols, the maximal and submaximal VO2 and HR were analyzed.