The race is on! Pregnant Gisele Bundchen powers through on her bike as she tries to stay in shape before birth

PUBLISHED: 14:08 EST, 23 September 2012 | UPDATED: 14:53 EST, 23 September 2012

With her Victoria’s Secret colleagues hitting the runway shortly after and even during their pregnancies, there’s not wonder why she’s feeling the pressure to stay in control of her weight.

And Gisele Bundchen has been certainly been keeping on top of her work out routine this weekend, despite having to balance her existing parenting duties.

The 32-year-old was spotted enjoying a bike ride in Boston on Sunday, with her son Benjamin Brady enjoying the view from a baby seat at the back.

No rest for the wicked! Gisele Bundchen and her son Benjamin went on a ride on a bicycle in Boston on Sunday

The beautiful underwear model went along the Charles River and displayed a rounded belly in her casual clothing.

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She dressed in a grey hooded top and trousers which she paired with a baseball cap and trainers.
It looked like she and her two-year-old – who donned a safety helmet over his hat - were planning on some play time later.

She kept a small plastic ball in the basket on the front of her bicycle as they took in the lush greenery.

Casual gear: The model wore a grey hooded top and trousers for the gentle work out

Taking in the sights: The Brazilian star rode along the Charles River with her and Tom Brady's little boy

Working up a sweat: Gisele is clearly trying to stay slim despite the fact she is expected to welcome her second child later this year

On Saturday Gisele went for a power walk with her little boy in a stroller and her huge dog on a leash.

Her friend and another youngster joined them as they wandered through the same area.

This time she wore a black top and a huge green coat for the Autumn outing where she mixed up her exercise.

Regular route: She was spotted in the same area on Saturday with a friend

Everyone's welcome: They also took their dog along for the power walk

The five-foot-eleven star is expecting her second son with sportsman Tom, who already has five-year-old son Jack with actress Bridget Moynahan.

Her fellow lingerie model Alessandra Ambrosio was several weeks pregnant when she strutted down the catwalk in the Victoria's Secret Fashion show in November 2011.

Australian model, Miranda Kerr wasted no time getting back on the runway after the birth of her first son Flynn in January 2011.

Just two months later Orlando Bloom’s wife made her post-pregnancy debut at Paris Fashion Week.

Dressed for Autumn: Bundchen wore a huge green coat as she pushed her boy in his stroller

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Comments (9)

The comments below have been moderated in advance.

I'm starting to wonder if they ever spend any time at that monstrous house they spent forever building in LA.

- Alex , Los Angeles, 24/9/2012 01:39

Click to rate Rating 32

Apart from her height, I never understood how she became a supermodel. I used to live and work in Rio and saw better looking girls selling fried fish on the beach in Ipanema.

- Jackie , London, United Kingdom, 23/9/2012 23:37

Click to rate Rating 61

I would have my nannies taking the children for a walk. She doesn't want to be seen walking about pregnant. When you're that rich, you should just have the nannies take care of everything, put your feet up while you're pregnant and watch tv.

- LN , Neverland, 23/9/2012 23:34

Click to rate Rating 33

Since she said sunscreen was poison - even after staring on Nivea adds - I can't stand her anymore. Skin cancer is deadly, one must wear sunscreen.

- Lil , Camberley, 23/9/2012 22:12

Click to rate Rating 10

I really don't find her pretty. Fantastic body I guess, but her face just doesn't do it for me.

- CB , Texas, USA, 23/9/2012 21:08

Click to rate Rating 43

One other observation: Gisele's Trek bike is sized-perfectly for her, the saddle inclination looks spot-on for a supermodel, and seat height also looks perfect, w/ more than enough extension. Who set-up her position? Lance Armstrong?!

- JoeP , Milano, 23/9/2012 21:02

Click to rate Rating 9

Wow - never thought I'd say this about a tall, gawky VS supermodel, but she looks girl-next-door hot! Especially in pic#1, her natural beauty just radiates! Maybe it's the hormones from being preggo?! lol... One good thing about a guy like Tom Brady is that he reproduces with spectacularly-beautiful women, ensuring (hopefully) even more gorgeous progeny. Ban ugly people!

- JoeP , Milano, 23/9/2012 20:56

Click to rate Rating 11

Thank god she's wearing a trackie, if it were army fatigues, she might no know she's having a baby!

- jojo , Perthshire, 23/9/2012 20:48

Click to rate Rating 6

glowing!

- valentina , Concepcion, Chile, 23/9/2012 20:22

Click to rate Rating 4

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