The Single mother workout!

She’s a proud single mom, so when it comes time for a bit of fitness, she’s happy to take her son Jackson along.

Charlize Theron and her one-year-old son enjoyed a bit of mommy and me time on Friday as the pair set off on a hiking adventure at Runyon Canyon park in Hollywood on Friday.

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The 37-year-old sported a sleek and slouchy look, showing off her toned arms in a striped blue vest top and loose-fitting grey sweatpants.

Charlize added a touch of chic with a pair of cool black sunglasses and proudly flaunted her newly highlighted locks.

Despite showing off her muscles, the South African-born star still struggled with pulling her son’s pushcart out of the boot of her car.

But they were soon off and Charlize placed her young son into the pram for a run through  the popular park in the Hollywood Hills.

Trailing behind the pair were their two dogs, who looked to be enjoying the burst of  California sunshine.

Charlize, who once admitted to being a heavy smoker, has said that turning to yoga and  exercise has helped her keep a healthy lifestyle.   ‘I’m sure there are women who never have to worry about what they eat. But I do,’ she recently told Vogue magazine.

‘I exercise a lot, and I hike a lot. My mom and I hike at least three times a week.’

She continued, talking about how her tall lean frame has set her apart from the mainstream image of beauty in Hollywood.

‘I was too tall, too big, too late for the supermodel look of the Eighties. Kate Moss and  all the tiny, grungy girls had just become fashionable, and I didn’t fit the bill.’

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