Shape's Most Popular Workouts of 2015
#15: The Total-Body Rowing Workout
Don't just row, row, row your erg (snooze)—this workout requires you to push at different intensity levels and even hop on and off the rower for inventive bodyweight moves that use the handle, seat, or base of the machine. Not to mention, it burns a crap ton of calories (540 per hour) with minimal impact. Get rowing!
#14: 18 No-Crunch Ab Exercises for a Flat Belly
#13: The 6-Minute Workout for a Stronger Core
#12: The Butt Workout a Professional Ballerina Swears By
#11: 7 Slimming Thigh Exercises from Pure Barre
Popular barre studio Pure Barre shared their best moves to target your inner and outer thighs for strong, sexy legs. The key? Tiny, isometric movements to burn fat and sculpt long, lean muscles.
#10: The 30-Day Yoga Challenge
#9: The 20-Minute Fat-Burning Kettlebell Workout
Kettlebell training is one of the best ways to get a great workout when you're pressed for time, and this killer workout is no exception. These total-body exercises torch major calories while strengthening your entire body in just 20 minutes.
#8: 9 Core Exercises for Six-Pack Abs
Everybody wants a six-pack—but FYI, there are actually four key muscle groups you need to tone to get a taut tummy. These hardcore exercises work the obliques—plus ab muscles you never knew you had—to deliver amazing results that endless crunches can't.
#7: The Fat-Burning Jump Rope Workout
This simple piece of exercise equipment is all you need to get an incredible workout. In just 15 minutes, you'll burn major calories (up to 13 calories per minute, to be exact) and tone all over with this custom full-body internval training workout from the founder of the jump rope company CrossRope.
#6: 16 Squats That'll Work Your Butt
We all know the secret to a tighter, stronger, curvier, and perkier butt is squats...and lots of 'em. But, let's be real, no one wants to do endless repetitions of basic, up-and-down squats—and the secret to real results lies in switching things up. That's why we asked Alex Silver-Fagan, an ACE-certified Nike trainer based in New York City, for a refresh on the basic squat, plus 15 variations that'll make you rethink getting low.
#5: 10 Oblique Exercises for a Flat Stomach, Fast
They key to a killer core is paying attention to your obliques. Strong obliques will make your waist appear slimmer, improve your posture, support your lower back, and make your clothes fit even better. (And crunches won't do you any favors here!) So we tapped trainers with sick abs from across the country to share their secret moves for toning up the oblique muscles.
#4: Barry's Bootcamp-Inspired Abs, Butt, and Core Workout
If you're a fan of the celeb-endorsed, party-themed classes from Barry's Bootcamp, you'll love this exclusive 30-minute cardio-strength workout from celeb trainer Derek DeGrazio of Barry's Bootcamp Miami Beach. You'll burn fat while sculpting and toning your abs, butt, and core (the "ABCs") using Barry's signature interval format.
#3: 31 Creative Plank Exercises for a Killer Core
How much do you love planks? So much, right? You should, because this total-body toner works all the muscles in your core (including the rectus abdominus, or the "six-pack muscles" you can see, your transverse abdominus, and your internal and external obliques), your hips, your arms and shoulders, and your back. Trainer Kira Stokes created this one-month challenge that puts 31 creative spins on the traditional plank exercise to get you firmer faster.
#2: Shaun T's Tough New Insanity Workout
When you want a crazy-good workout that delivers insanely good results, who better to turn to than the mastermind behind the Insanity workouts, Shaun T? We tapped the personal trainer to demo some of his favorite moves from his new program, Insanity MAX:30, a total-body workout combining interval training, plyometrics, cardio, and body-weighted resistance training.
#1: Abs-olutely Amazing Core Exercises for a Flat Stomach
Blast off belly fat with this four-week workout routine that works your core to exhaustion, sculpting six-pack abs and a super flat stomach—minus the crunches—thanks to a research-backed formula.