The bulk update request #9595 is pending approval.

create implication stretching_arms (400) -> stretching (11180)
create alias stretching_leg (8) -> stretching_legs (108)
create alias leg_stretch (51) -> stretching_legs (108)
create implication stretching_legs (108) -> stretching (11180)

Reason: Just some straightforward implications and a little consolidation of various leg stretching tags.