Jennifer Garner shows off her toned arms in a white tank top during a morning run with her son Sam, 11, in LA

Jennifer Garner shows off her toned arms in a white tank top during a morning run with her son Sam, 11, in LA

Jennifer Garner showed off her incredibly toned arms in a white tank top during a morning run with her son, Samuel, in Los Angeles on Sunday.

As she ran down the street, the 51-year-old actress’s preteen rode alongside her on his blue bicycle.

After working up a sweat together, the Alias ​​actress, wearing a pair of black camo leggings and white sneakers, stopped for a refresher at Starbucks.

The Golden Globe completed her sporty ensemble with her Apple Watch, over-the-calf compression stockings, minimal makeup, and her light brown hair pulled up in a low bun.

During their outing, her 11-year-old wore an oversized purple hoodie, black helmet, gray pants and sneakers.

Fit: Jennifer Garner showed off her incredibly toned arms in a white tank top during a morning run with her 11-year-old son, Samuel, in Los Angeles on Sunday

The Houston-born beauty, who lives in Brentwood, shares her baby son and daughters Violet, 17, and Seraphina, 14, with her ex-husband, Ben Affleck.

The A-list exes tied the knot in 2005 after working together on Pearl Harbor and Daredevil.

However, things ultimately didn’t work out between the Elektra co-stars (Ben returned as Daredevil in deleted scenes), with the pair splitting for good in 2016.

They finalized their divorce two years later and now have an amicable co-parenting relationship.

While appearing on The Drew Barrymore Show last April, Garner shared how she incorporates jogging into her daily sweat-breaking effort.

“What I do in the morning is exercise,” she told Barrymore, who looked puzzled, and replied, “Every day?! Oh God.’

Seeing how defeated the host looked as Garner learned to train almost every day, she clarified her revelation by adding, “No, Drew, really. You have to do heavy cardio to get that – to get yourself – I’m sorry, you do.”

Garner went on to share how she believes that moving our bodies not only improves the body, but also the mind and brain.

Adorable: While jogging down the street, the 51-year-old actress's preteen rode alongside her on his blue bike

Adorable: While jogging down the street, the 51-year-old actress’s preteen rode alongside her on his blue bike

Gymrat: When she appeared on The Drew Barrymore Show last April, Garner shared how she incorporates jogging into her daily sweat-breaking effort

Gymrat: When she appeared on The Drew Barrymore Show last April, Garner shared how she incorporates jogging into her daily sweat-breaking effort

Prioritizing health: Garner went on to share how she believes moving our bodies not only improves the body, but also the mind and brain

Prioritizing health: Garner went on to share how she believes moving our bodies not only improves the body, but also the mind and brain

The artist actually has the science to back up her claims about how exercise can enhance mental health benefits.

A study published in the March issue of the British Journal Of Sports Medicine found it to be more effective than medication in treating anxiety and depression.

For people who have had trouble sticking to a consistent exercise regimen, like Barrymore, Garner suggested finding exercise activities they enjoy.

“You find something that really makes you happy while you’re doing it, otherwise it won’t work, because this isn’t going to work,” the Once Upon A Farm co-founder told the talk show host.