Described herein is a training harness comprising: a harness comprising at least one anchor point connecter; and a retractable tether comprising a casing supporting and storing a rotatable spool, a handle grip connected to the casing, a tether comprising a first end coupled to the spool and a second end configured for reversible coupling to the at least one anchor point connecter, an elastic section at or proximal to the second end. The training harness may be used by children learning a sport, particularly a downhill gliding sport such as skiing or snowboarding.