Jennifer Garner went for a power walk yesterday morning in LA. The movie star mom has spent most of her Summer surrounded by her adorable family but took a timeout to get in some solo exercise around her neighborhood. She's back home after spending time in NYC earlier this month with Ben and her girls as she wrapped up filming Arthur. While Jen is taking advantage of a break from work, Ben has some business travel of his own in store as the Summer comes to a close. The Town is set to premiere at the Venice Film Festival next week, two days after his brother Casey's curious Joaquin Phoenix movie I'm Still Here makes its debut there as well.