You always have to warm up, if you start to over exert yourself without a warm up you could get hurt
It will help you build muscle for sure but you will need to increase the reps if you want to improve further, it helps to build your biceps, pectoralis, and your deltoids
I don't know what the 1.6 means but if an individuals skin has a rash,itching or bubbling these should be reported or one should see a doctor, these can be a cause of a allergy or wrong medication.
The answer is D.I.D. aka dissociative identity disorder.
