Here are the workout trends that saw the biggest spike on the search engine this year compared to the year before.
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On Wednesday, Google released their annual Year in Search data for 2015, which included a list of the fitness trends that experienced the biggest spike in search traffic this year compared to the year prior. Although last year's list was dominated by intense, seriously sweat-inducing workouts like P90X and Body Beast, 2015 saw a shift towards mindfulness with yoga nabbing four of the top ten spots, along with newer trends such as OrangeTheory Fitness (above). If you need some inspiration to kick-start your 2016 fitness goals, look no further.

1. Yoga with Adriene

Adriene Mishler is an online yoga teacher who has amassed a devoted following through her popular YouTube channel and blog, The Austin, Texas native (and professional actress by training) discovered yoga when she took a Kundalini yoga class her freshman year of college. Although Mishler shares a variety of stand-alone tutorials on YouTube (from yoga for wrist pain to weight-loss yoga), she is known for her "30 Days of Yoga" challenge, a free, downloadable PDF calendar with daily workouts. "Every day [in the challenge] is different," she says in an introduction video. "They're all designed to empower you and help you create a home practice so you can find what feels good daily."

2. Yoga Challenge

Yoga Challenge, another popular online yoga program, was founded by Kino MacGregor and Kerri Verna. The fitness trainers have harnessed the power of their social media platforms (both MacGregor and Verna boast 900,000 Instagram followers) to create video-based workouts to help people practice yoga at home. The duo's introductory Beginner Yoga Plan includes 14 video sessions that cover strength, flexibility, meditation, and breathing for $60.

3. 21 Day Fix

21 Day Fix is a workout plan that also incorporates nutritional guidance. The program, which was created by celebrity fitness trainer Autumn Calabrese, sells an "Essential Package" ($73, that's centered around color-coded containers intended to make it easier for you to consume pre-measured portions of food. The package also includes seven 30-minute workout videos and additional resources such as a 21 Day Fix Eating Plan and 3 Day Quick Fix.

4. CrossFit

Although CrossFit isn't new (the fitness company launched back in 2000), it has continued to grow in popularity and now offers classes around the world. The notoriously challenging workout consists of a series of short exercises that are completed one after the other, such as sprints, box jumps, squats, pull-ups, and burpees. The intense workout may even elevate your metabolic rate for up to 48 hours after a session has ended, increasing lean muscle mass and helping you burn more calories. Thinking of joining the movement? Here are seven important things to know before your first class.

5. Team Beachbody

Team Beachbody is a healthy living community that offers fitness plans, nutrition tips, and wellness products. Although you can become a member for free, most of the features can't be accessed without signing up for the program's premium membership ($39 a quarter), which gives you video streaming, personalized meal plans, and a coach to offer support and motivation.

6. Back Workouts

Having a strong back is essential for maintaining good posture, especially for people who suffer from lower back pain. This workout plan from celebrity trainer Kathy Kaehler can help you strengthen and tone your back muscles to give your posture a boost, while these moves from physical therapist Renée Garrison are particularly useful for warding off lower back pain (bonus: they'll work your core, too!).

7. Orangetheory Fitness

Orangetheory Fitness is an interval-training studio that offers 60-minute sessions of indoor rowing, treadmill training, and weight training designed to help your body burn calories even after the class has ended. Because every session uses heart rate monitoring, the intensity of each workout adjusts to your specific abilities. The company has expanded quickly since its 2010 launch and now has studios in 36 states, as well as Australia, Canada, Colombia, Dominican Republic, Mexico, and the U.K.

8. Kettlebell

Kettlebell workouts made this list for the second year in a row—and for good reason. A cast-iron weight attached to a handle, kettlebells can help you build serious strength and power in your workouts. Incorporating them into an already-challenging move (such as squats or a plank) will burn extra calories in a short amount of time. Here, our top kettlebell exercises to help you tone your whole body.

9. Yoga for Kids

Kids who get regular physical activity experience a slew of important health benefits, and strengthening exercises such as yoga could help: in a 2014 study, kids with stronger muscles were found to have a lower risk for developing conditions like heart disease and diabetes. If your children are interested in trying yoga, ask your local studio if they offer any classes targeted at kids. You can also find many (free!) tutorials on YouTube—the Yoga Today channel has a great ten-minute tutorial that's perfect for little ones.

10. Asana Yoga

There are many different kinds of yoga, and finding the right class for you can be challenging. However, the term "Asana Yoga" usually refers to the different poses used in a practice rather than a specific type of yoga (such as Hatha or Yin). If you're new to yoga, get started with our top poses for people who aren't flexible or best relaxing yoga moves.