The 15-minute workout you should be doing

Walk-outs with press-up

Feet together, take your hands all the way above your head before bringing them down to the floor, trying to keep the legs straight to stretch out the hamstrings. With palms flat, walk your hands out until they are directly under your shoulders and your body is in a high plank. From here, do 5-10 press-ups before walking back up to standing. Want to make it harder? Try raising a single leg to increase the strain across your chest and arms.

Do: 5 reps