Lindsay Lohan happily showed off her new healthy exercise habit yesterday in LA. She was in a sports bra to hit the elliptical, while her little sister Ali worked out on a nearby machine. LL also made time for fitness over the weekend, when she wore a similarly skimpy outfit to perfect her boxing moves. She's balancing working up a sweat with occasional indulgences — Lindsay treated herself to a Carvel ice cream cake to celebrate the premiere of her favorite TV show True Blood's third season. Her sweatpants didn't quite do the job of covering up her SCRAM ankle monitor, but LL is still making sure to keep her device hidden when she wants to with her constantly expanding boot collection.