There is no question that the boutique fitness market and group fitness classes are exploding and nothing excites us more than seeing so many amazing studios and fitness concepts pop up every day.  Of course, mainstays like yoga, Pilates, indoor cycling and barre classes continue in popularity and we expect these workouts to be around for the long-term. 

But as we look ahead to 2014, we want to highlight 10 fitness trends gaining particularly strong momentum that we expect to see a lot more of in the coming months. A few common themes stand out: workouts that offer efficiency, a combination of cardio and strength benefits, variety and fun. Also hot for 2014: team-based workouts like SWERVE and Throwback Fitness, online workouts, and trackable performance-based workouts that build on the burgeoning quantified self movement and popularity of devices like the Nike+ FuelBand SE and Fitbit Force^TM.  

1. CrossFit: On track to reach almost 10,000 CrossFit affiliates worldwide this year - nearly double from last year - CrossFitters can't get enough of the high-intensity, constantly varied functional movements and passionate community offered by CrossFit. Check out 10 reasons to try CrossFit here.
    
2. HIIT & Tabata Workouts: One trend that will never fade is the desire for great results in less time. High Intensity Interval Training (HIIT) - combining short, intense bursts of resistance and cardio - is proving to be one of the most effective and time-efficient workouts around and is increasing in popularity with workouts such as Barry's Bootcamp, INSANITY, Orangetheory Fitness, Jillian Michaels' BODYSHRED^TM, Les Mills' BODYATTACK^TM and NYC-based The Fhitting Room and Brooklyn Bridge Bootcamp. 
    
3. Board-based workouts: Surf's Up! Fun, effective and cool on the water, Stand Up Paddle (SUP) workouts allow you to improve your balance and core, perform bodyweight exercises, and enjoy the beauty of the outdoors. Expect to see SUP workouts at a lake or bay near you throughout the warmer months. Not near a body of water? Have no fear, SurfSET Fitness classes are rapidly expanding to gyms and studios across the country and draw from the real movements of surfing to create an indoor workout that gives you a lean surfer's physique. 
    
4. Dance Cardio: Kick-ass tunes and tons of fun, dance cardio provides an amazing workout without feeling like exercise. With celebrity trainers Tracy Anderson, Nicole Winhoffer, Simone de la Rue and Anna Kaiser paving the way, don't be surprised if a dance party is coming to a studio or gym near you.  
    
5. The Megaformer^TM Workout: Referred to by many as "Pilates on crack", there is no doubt people are addicted to fitness guru Sebastien Lagree's method that is sweeping the nation from Hollywood to NYC. Performed on a Megaformer machine (a souped-up Pilates reformer), the Lagree Fitness method takes the strength-based foundation of Pilates and mixes in intense muscle endurance and cardio training resulting in a full body, shirt-drenching workout.  
    
6. Adventure/Mud Obstacle Race Training Workouts: We forecast a boon to laundry detergent sales in the next year as one thing is for sure - people are getting down and dirty! With the soaring popularity of Spartan Race, Tough Mudder, Mudderella, Civilian Military Combine, among others, more and more studios are creating training classes to prepare for adventure and mud obstacle races.  In addition to getting an intense full-body workout, participants are drawn to the team environment, sense of camaraderie, and feeling of accomplishment from overcoming physical and mental obstacles. Ready to train for your first race? Check out these tips here.
    
7. Indoor Rowing: Row, row, row....your butt off with the latest CrossFit offshoot: rowing-focused group fitness classes. Rowing is low-impact, uses large muscle groups with an extended range of motion providing a full-body cardio workout that engages over 20 muscle groups in the legs, back, core, shoulders and arms! That translates to maximum intensity and efficiency.
    
8. Mixed Martial Arts (MMA), Kickboxing & Boxing Workouts: With the rapid expansion of UFC GYM, continued popularity of Les Mills' BODYCOMBAT^TM classes, and Gracie Jiu-Jitsu, Krav Maga and other martial arts academies sprouting up nationwide, expect to see people kicking and punching their way into 2014.
    
9. Fusion Workouts: In response to the demand for maximum efficiency, more and more studios are adding 30/30 and fusion classes, combining elements of more than one workout method.  Especially popular are PILOXING® (Pilates + boxing + dance), yo-lates (yoga + Pilates), indoor cycling + yoga, cardio-infused TRX/suspension training classes, and dance-infused yoga classes such as BUTI^®.
    
10. Drumming-based Workouts: Who doesn't want to feel like a rock star? Now with drumming-inspired fitness classes like POUND and Drums Alive, you can shed pounds while rockin' out.