Increasing-available ultra-strong gradient systems introduce a new challenge in MRI: the unknown interaction of time-varying magnetic fields with the human body. We characterise the physiological effects of deploying 300 mT/m gradients Siemens Connectom system when imaging regions below the neck (i.e., heart and prostate). We show gradient amplitude thresholds for PNS (ramp times < 2ms) are first reached on the Y-gradient. Moreover, landmarking on the heart gives the highest probability of generating magnetophosphenes (all gradient-axes). This study establishes: (i) limitations in greatest system performance; and (ii) that the so-far head-only Connectom system can be safely used in ‘below-the-neck’ applications.