A gait cycle is a series of events in walking or running that starts with one foot is getting in contact with the ground (heel-strike) and to the same foot is getting in contact with the ground again (heel-strike). Gait cycle has two phases: the weight bearing stance phase and the non-weight bearing swing phase. In stance phase the foot is on the ground, that accepts the body weight. There are further phases within stance phase such as initial contact (or heel-strike), loading response, mid-stance, terminal stance and pre-swing.heel strike also initial contact – occurs when the heel – and only the heel – of the leading leg start to touch the ground. Loading response: Following heel strike the body absorbs the shock, and the body weight is being transmitted onto the leading leg. The entire foot is getting in contact with the ground – foot is flattened. In mid-stance the weight is transferred onto the fixed limb – single limb support – which stabilises the position and supports/enables the opposite limb to swing forward freely till the point where the ankles of both limbs are aligned In terminal stance single limb support continues. The heel of the supporting limb lifts off the ground. Pre-swing or toe-off: Toes are off the ground. In Swing phase the foot/limb is off the ground and is moving (swinging) forward. This is the phase of limb advancement. It takes up about 40% of the gait cycle. It can be subdivided into Initial swing, Mid-swing and Terminal swing. Initial swing: the toe is off the ground. It starts with the foot leaves the ground and ends with full knee flexion. The swinging limb is positioned directly under the body. Ankle goes from plantar flexion into dorsiflexion. Mid-swing: it starts right after full knee flexion and ends with the vertical position of the tibia. Ankle is dorsiflexes. Knee goes form flexion into extension. Terminal (late) swing: At the end of mid-swing the knee is in full extension and the ankle is neutral preparing the leg for heel-strike – the beginning of stance phase.