Difference between Loosen Up and Unwind

LOOSEN UP vs UNWIND: VERB

To relax, act less seriously.
Cause to feel relaxed
Make one's body limber or suppler by stretching, as if to prepare for strenuous physical activity
Cause to become unblocked
Become less tense, less formal, or less restrained, and assume a friendlier manner
To become loose; to loosen
Become less tense, rest, or take one's ease

Reverse the winding or twisting of
Separate the tangles of
Become less tense, rest, or take one's ease
Cause to feel relaxed
To wind off; to loose or separate; to untwist; to untwine; as, to unwind thread, to unwind a ball of yarn
To relax; to chill out; as, to rest and relieve of stress

To disentangle.
To wind off; to loose or separate, as what or convolved; to untwist; to untwine.

To admit of being unwound; become unwound: as, a skein that unwinds easily.
To disentangle; free from entanglement.
To wind off; loose or separate, as what is wound or convolved; set free or loose: as, to unwind thread or a ball.

Fatten up, Eke out, Morning sickness, Sniff out, Unstuff, Unstrain, Unlax, Make relaxed, Limber up, Decompress, Unbend, Unwind, Relax, Slow down, Warm up

Ravel, Settle, Chill, Lighten, Wind off, Unstrain, Unlax, Make relaxed, Slow down, Loosen up, Unbend, Unroll, Disentangle, Decompress, Relax

Wipe away, Make headway, Body odor, Snuff out, Sit tight, Fatten up, Eke out, Morning sickness, Sniff out, Limber up, Decompress, Unbend, Relax, Slow down, Warm up

Untangle, Rejuvenate, Loosen, Unravel, Laze, Destress, Rest, Settle, Chill, Slow down, Loosen up, Unbend, Disentangle, Decompress, Relax

Your muscles really loosen up in heated water.
Great reminder to loosen up and have fun!
Do easy stretches to loosen up your muscles.
The straps can loosen up as you drive.
NEVER had one loosen up since I changed.
Turn the speakers up a little louder than you normally would will help loosen up the material.
Things are stating to loosen up as state parks and boat launches open up.
In sum, my internal workplace advice is: open up, loosen up, listen up, speak up, and don't work weekends on anything you don't enjoy.
However, they tend to loosen up after washing up for a few times.
Should I dig up and loosen up the rootball?