Have ipad2. When useing at gym with headphones music hesitates with movement. Usually woman's voice gives message before music restarts. Have turned off Shake, Bluetooth

Have an ipad 2 in good working order. 2500 sounds downloaded in my itunes. When playing at gym with headphones, movements of my body causes the song to stop, a female voice makes comments such as, "you are already connected to music". The song continues after a few seconds until the iPod moves again. I have disabled shuffle, wifi and Bluetooth. Makes no difference. Thanks for any suggestions I might try. - Ray