Arms size, cold and your height

[angang]

5' 10"
bi's 16
167 lbs
6 - 7 % BF
My weight has been going crazy the last couple of weeks loosing and gaining up to 4 lbs a day.... i must be doing something wrong!! can't get the weight to stick.

 

[sweed]

5' 10"
bi's 16
167 lbs
6 - 7 % BF
My weight has been going crazy the last couple of weeks loosing and gaining up to 4 lbs a day.... i must be doing something wrong!! can't get the weight to stick.

I dont weight my self everyday, its prob the time of day u weigh yourself, and water weight influences it a lot ? i weight my self every 5-7 days or so.