The bulk update request #9595 is pending approval.

create implication stretching_arms (472) -> stretching (11979)
create alias stretching_leg (11) -> stretching_legs (123)
create alias leg_stretch (54) -> stretching_legs (123)
create implication stretching_legs (123) -> stretching (11979)

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