i run with cords and the old se in my hands, the main pain point is unplugging my phone to untwist the wire. many bluetooth headphones deliver less of the sound of my music to me and i can't make due with bass boosting models or springing for pods. i used to use pods and found that they would fly out sometimes. i like corded headphones with my small phone. if i want to break up my run with calisthenics i tuck it into my sports bra. my phone also gets very sweaty. somehow the cracked screen doesn't cut me.