A method comprising: receiving, at a first station, a first plurality of training data units (d 1, d 2,...,d n), wherein each training data unit in the first plurality of training data units includes an information element that specifies a number of training data units that the first station is to transmit to the second station during a subsequent training procedure, wherein the first station operates a plurality of antennas (120, 122, 124) in an omni receive pattern mode while receiving the first plurality of training data units (d 1, d 2,...,d n); generating, at the first station, a plurality of quality indicators based on the received first plurality of training data units (d 1, d 2,...,d n), wherein each quality indicator corresponds to a respective one of the received first plurality of training data units; selecting, at the first station, one or more training data units from the received first plurality of training data units (d 1, d 2,...,d n) based on the plurality of quality indicators and according to a selection rule; transmitting, from the first station to the second station, one or more indicators of the selected one or more training data units; and after receiving the first plurality of training data units (d 1, d 2,...,d n), transmitting, from the first station to the second station, a second plurality of training data units(d' 1, d' 2,...,d' n) as part of the subsequent training procedure, wherein the number of training data units in the second plurality of data units corresponds to the number specified by the information element in each of the first plurality of training data units, and wherein the first station applies a selected transmit steering vector to the plurality of antennas (120, 122, 124) while transmitting the second plurality of training data units. receiving, at a first station, a first plurality of training data units (d 1, d 2,...,d n), wherein each training data unit in the first plurality of training data units includes an information element that specifies a number of training data units that the first station is to transmit to the second station during a subsequent training procedure, wherein the first station operates a plurality of antennas (120, 122, 124) in an omni receive pattern mode while receiving the first plurality of training data units (d 1, d 2,...,d n); generating, at the first station, a plurality of quality indicators based on the received first plurality of training data units (d 1, d 2,...,d n), wherein each quality indicator corresponds to a respective one of the received first plurality of training data units; selecting, at the first station, one or more training data units from the received first plurality of training data units (d 1, d 2,...,d n) based on the plurality of quality indicators and according to a selection rule; transmitting, from the first station to the second station, one or more indicators of the selected one or more training data units; and after receiving the first plurality of training data units (d 1, d 2,...,d n), transmitting, from the first station to the second station, a second plurality of training data units(d' 1, d' 2,...,d' n) as part of the subsequent training procedure, wherein the number of training data units in the second plurality of data units corresponds to the number specified by the information element in each of the first plurality of training data units, and wherein the first station applies a selected transmit steering vector to the plurality of antennas (120, 122, 124) while transmitting the second plurality of training data units.