just seen this on brainiac
point both your arms out strait in front of you.
should be the same length.
now with your right arm move it back and forth "like curling weights" for 30 seconds "or 30 reps".
now check for length again.

point both your arms out strait in front of you.
should be the same length.
now with your right arm move it back and forth "like curling weights" for 30 seconds "or 30 reps".
now check for length again.
