Fig. 2
From: Normalized economical speed is influenced by aging and not by exercise habituation
Time delay of stride length (TDSL) and step frequency (TDSF) at 30-s and 180-s period among SY, AY, and AE groups. *significantly greater TDSF in the AE than in the AY and SY at the 180-s period. #significant difference in the TDSF between 30-s and 180-s within the same groups (within SY or AY, respectively). Two participants (AE = 1 and AY = 1) were excluded due to a data unavailability at the 180-s period