Well during a bicep curl the triceps relax enough for the biceps to be able to curl to tense and contract in a curl. This is called antagonist which means “a muscle whose action counteracts that of specified muscle.”
Hope this helps:)
Answer:
Stretch is key I recommend watching a tutorial then get down the basics and try it while recording your self compare it to the video so you can see what you need to fix
Explanation:
Hope it helps
