Guessed by buttonpusher

You could make a motivational exercise button. Stick the suction cup onto a mat/the floor, attach the push-button onto it so that every time you do a push up your chest presses the button and one LED lights up. The suction cup is there so that the push-button will not budge whilst completing your press-ups. The LED will only light up if the desired speed of your push up is consistent with the desired speed you set in the Arduino. The headphones are there with whatever you wish to help you continue your push-ups.. be that an 'army major" with a commanding tone -come on you can do better that that", music or a silky-voiced motivational coach "wow, you're doing amazingly".

Once you have completed seven successful press-ups the you can take a breather and re-program the Arduino so that after every two press-ups an LED lights up.