Furthermore, typically, the “first leg” corresponds to a standing leg in {TAIL ~ the current single leg grounded period} and the “second leg” corresponds to {HEAD ~ the idling leg} in the current single leg grounded period 
Furthermore , typically , the “ first leg ” corresponds to a standing leg in { TAIL ~ the current single leg grounded period } and the “ second leg ” corresponds to { HEAD ~ the idling leg } in the current single leg grounded period
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH