How to improve ?

I mainly just lift weights in the gym but after a 2 week break I weighted myself and saw I gained 5 lbs. Either way how can I lower my heart rate ? I’ve seeing on YouTube that listening to music sometimes helps due to the beats.

I mainly just lift weights in the gym but after a 2 week break I weighted myself and saw I gained 5 lbs. Either way how can I lower my heart rate ? I’ve seeing on YouTube that listening to music sometimes helps due to the beats.