Just because the fall has started doesn’t mean we let the abs go bye, bye. Keep your stomach flat and tight with this triple threat ab circuit. All you need is a mat and a dumbbell (optional). Lay flat on your mat, holding dumbbell, arms stretched back above head. Bring the arms forward and go straight toward the ceiling, then lay back down; next bring the arms forward and stretch out toward feet, then lay back down; last take the arms forward only and bring legs up toward arms. Do this 10x in a row for a real burn, give yourself a 30 second break then repeat 2 more times. That’s it – your triple threat ab workout!