This dynamic core move is multitasking at its best. It'll tone the abs and hip flexors while also stretching the back and hamstrings. It's the perfect floor exercise to do while binge-watching Netflix or after a run.

• Begin on your back with your legs straight and arms reaching overhead.
• Lift your head and arms off the floor and begin to roll up to sitting, focusing on the abs pulling toward the spine to engage the deep abs (aka the transverse abdomonis), rounding the back, and keeping the motion smooth. If you have tight hamstrings, try this exercise with your knees bent and your feet flat on the floor.
• Roll back down to the mat slowly, one vertebra at a time. End by reaching your arms overhead to complete one rep. Moving slowly and with control will make the abs workout move so do not rush rolling up or rolling down.
• Do five to 10 reps for a set, and aim for at least two sets.