5x1 Lower

Everything was done today 5x1

1st Work Out 7:30
Squat
550 (92%)
Tried to pull afterward but that wasn't happening so I just shut it down

2nd Work Out 9:00
Lat Pulls 5x3 250 (stack)
P/W
bar shrugs 675 x3
Lat Pull Iso at the bottem 4 sec.
P/W
DB Shrug Iso at top 140#
WTD back ext. x3

3rd Work Out (1:30)
GM worked up to 300#
RDL worked up to 425#
SL split ISO 4 sec.

I'm really worn down right now, my elbows were hurting so bad after my squats my hands were shaking, it's weird they don't hurt when I do any pressing movements, or any pulling movements, just when I squat...