Is your swolemate impossibly stylish?  Do you never know what to buy because the fit gal in your life is always wearing something so fashionable, you don't even know what it is?  That person will likely love anything from this designer activewear list — with collaborations between the best athletic brands and the best fashion designers, you're guaranteed to find something perfect.

Prabal Gurung Sport

Bold color-blocking, eye-catching design, and superunique lines combine in the ultimate high-end fashion-meets-function collection from Prabal Gurung at Bandier.

adidas by Stella McCartney

You can always expect to see gorgeous styles year over year from adidas by Stella McCartney.  This season, we're loving soft purples, mixed prints, and subtle metallics.

New Balance x J.Crew

Two of our favorite brands joined forces this year to create the ultimate New York prep look for athletic activities.  Clean lines, staple neutrals (with pops of bold solid colors), and a few polka dots and stripes here and there make for a fun yet classic collection from J.Crew and New Balance.

Tory Sport

If you love the sophisticated (with a touch of retro) style from Tory Burch, you'll love the activewear from Tory Sport.  With a distinctly 1970s aesthetic, your look will definitely stand out from the crowd in the studio.

Kate Spade x Beyond Yoga

The preppy, feminine chic of Kate Spade meets ultrasoft, flattering styles from Beyond Yoga, making for the ideal collection for a girlie yogi or any active girl who loves pink and bows.

NikeLab Gyakousu

This year's lineup from NikeLab Gyakousu uses subtle neutrals and muted tones with bold, distinctly unique designs for running gear and beyond.  Longline vests, high-top sneakers, and t-shirt dresses are just some of the gems you'll find from their line this year.

Reebok x Gigi Hadid

Gigi's activewear game has always been fire, and now she's teamed up with Reebok to create an aesthetically on-point collection of active styles that are perfect for her favorite workouts, including boxing.

Julianne Hough x MPG

The Julianne Hough collection with MPG Sport brings the dancer's iconic fashion sense to life with an athletic look that can easily translate to street style.  The on-trend silhouettes and playful use of color make each piece impossibly cool.

Derek Lam x Athleta

Gap brand's Athleta is known for supersoft materials and functional pieces for the gym, so the Derek Lam x Athleta collection is just as fashionable as it is functional.  The line features pieces that are ideal for the gym, and even some transitional pieces to change into after you shower so you can head straight to dinner and drinks on the town.

Fitbit x Vera Wang and Public School

Fitbit's collaborations with Vera Wang and Public School have yielded some edgy and stylish bands and covers for your sporty tracker, making it easier than ever to go from gym to street.

Many of you probably know Massy Arias from her insane Instagram, but in case you haven't had your social feed blessed by her presence just yet, here's the scoop.  Trainer and creator of the MA30Day program, Massy trains in LA and is a soon-to-be mom.

That's all you need to know for now, because what you're about to see will likely melt your mind and you won't remember what we just said.  Enjoy!

This Is Massy

These Are Massy's Abs

Massy Is About 7 Months Pregnant

And It Doesn't Look Like She's Slowing Down ...

...

...

...

... Not One Bit

Her Workouts Are So Inspiring and Motivating

Just Look at This Treadmill Sesh!

She's Basically a Goddess

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A Warrior Goddess

...

And We Can't Get Enough of Her Instagram

You Keep Doin' Your Thing, Massy!

• The most common yoga injury and how to prevent it — Shape
• How to cut more than 200 calories a day without even trying — Women's Health
• 5 simple ways to calculate portion size — Cooking Light
• 6 superfood-packed side dishes for Thanksgiving — Health
• Dessert is served!  Healthy no-bake pumpkin bars — Self
• 7 things every runner should do during the off-season — Women's Running

If you've had a bad day, now's a better time than any to pop on a peppy playlist and sweat out your feelings.  Tune into peppy, positive tunes from Justin Timberlake, Sia, and Bruno Mars.  These upbeat jams will not only power you through a fun, mood-boosting, hour-long cardio or weight session, but they'll lift your spirits in the process, too.  Yay, happiness!

1. Happy
   Pharrell Williams
    
2. Time of Our Lives
   Pitbull, Ne-Yo
    
3. CAN'T STOP THE FEELING! (Original Song from DreamWorks Animation's "TROLLS")
   Justin Timberlake
    
4. I Gotta Feeling
   The Black Eyed Peas
    
5. Cake By The Ocean
   DNCE
    
6. Elevate
   St. Lucia
    
7. Me Too
   Meghan Trainor
    
8. Want to Want Me
   Jason Derulo
    
9. Boom Clap
   Charli XCX
    
10. Cheap Thrills
    Sia, Sean Paul
     
11. Best Day Of My Life - Single Version
    American Authors
     
12. Classic
    MKTO
     
13. Firework
    Katy Perry
     
14. 24K Magic
    Bruno Mars
     
15. Lost
    Scavenger Hunt
     
16. Wonderful Life (Mi Oh My) - from The Angry Birds Movie (Original Motion Picture Soundtrack)
    Matoma
     
17. Wild Things
    Alessia Cara

If this mix isn't your speed or style, check out all of our workout playlists to find something that suits your taste.  Just download the free Spotify software or app to listen to our playlists.

Hollywood's trainer Jeanette Jenkins is called upon by celebrities like Alicia Keys and Pink to give a kickass workout and total-body conditioning.  But her number one rule with clients?  "NO.  NEGATIVE.  SELF TALK.  EVER!"

Jeanette told us that it's the number one way to derail you from your goals.  "With your appearance, to what your doing — just no negative self talk!  It's very damaging."

She also noted that there are enough external factors bringing in negativity, so personal strength is incredibly important.  "I feel like there's enough things out there in society that are just waiting to bring you down, or people who will say something mean to you.  In our industry [fitness], everyone wants to critique everything already," she said.

Her advice?  "Just always embrace who you are and where you are at this time," she said.  "It might be 'that time of the month,' and I might have an extra five kilos 'cuz I'm bloated, but I'm gonna work those five kilos!  It is what it is!!"

It's important for Jeanette as a trainer to show herself the same respect she hopes her clients will show themselves — both in and out of the gym.  "I always try to carry that torch," she said.  "If I want women to love themselves, I have to love myself also.  Nothing replaces the beauty of you loving yourself;  loving yourself is so magnetic and uplifting, and people are attracted to that light."