As much as I'd like to say 'hey, good for you, Anna'....
Maybe she should've followed the damned directions for using the stupid dynamometer correctly.
You're not suppose to flail around. The elbow is suppose to remain at a 90 degree angle. Your upper arm is to remain stationary, parallel with your upper body, and your forearm parallel with the floor. The wrist is to remain stationary, with the hand in line with the arm. Any alteration from this position results in an inaccurate reading, which is typically registered higher than true grip strength due to angular differences resulting in contracted tendon pull range.
Also, the $30 hand dynamometer she ordered from Amazon has a +/- 1 lb accuracy range. Acceptable for a low price. If I was a faggot I'd order one for comparison, but instead I'll just happily use my hand squeeze trainer and fuck right off.