Instruct students to allow rubber bands to contract, observing any temperature change. Obtain a rubber band at least 0.5 cm wide. Quickly stretch the rubber band and then press it against your lips.

For a good leg and butt workout, this set of wide resistance bands are the ... For a better grip during your stretches, use these rubber exercise bands, which feature ankle straps and handles ...

But can we trust it? The technique is quite simple. You grab two rubber bands and place one around each ear to open up the lymphatic system and improve circulation, which should in theory help ...