Mitzi Rummel lifts weights during a Blast 900 class in Dunwoody on Friday, January 10, 2014.
January 10, 2014 Dunwoody – Mitzi Rummel lifts weights during a Blast 900 class in Dunwoody on Friday, January 10, 2014. Blast 900 is a type of workout that burns 900 calories in one hour and is a good way to lose weight in the new year. JONATHAN PHILLIPS / SPECIAL