The secret to sculpting a firm, toned and strong body is constantly varying your workouts so your muscles and mind won’t get bored. And now is the ideal time to refresh a tired fitness routine, kick-start a new training program and explore new workouts classes. To help you ease into your new fitness groove, we’ve rounded up everything you need so you don’t feel like the only new kid in class.

The Inspiration: 

Powerhouse celebs including Ellie Goulding and Hilary Duff are bosses when it comes to working up a serious sweat. They crave the intensity of a tough boot camp workout, and their defined physiques are proof of their hard work.

The Tips:

1. Prepare for anything. Boot camp workouts extend beyond the typical “military-style” class. Sure, you’re going to see plenty of push-ups, squats and lunges, but this fitness workout pulls from traditional calisthenic exercises, bodyweight moves, sprints, sports drills and plyometrics. Classes can be anywhere (indoors, in a park, on the beach) and may include buddying up with classmates for partner exercises.

2. Expect to feel breathless. The workouts are designed to push your cardiovascular limits, build strength and improve agility. Most classes incorporate intervals, so while your heart rate will spike, you’ll also have time to recover. The instructor is there to challenge you, but remember you can always modify movements and take breaks as needed.

3. Go for time or reps. Class styles vary greatly but there tends to be two main formats (similar to overarching program designs you’ll see in CrossFit workouts). The first is a time-based workout: for example do as many rounds of 10 squats, 10 burpees, 10 push-ups as you can in 20 minutes. The second is rep-based, which looks more like: do 10 rounds of 10 squats, 10 burpees, 10 push-ups as fast as you can. With either style there’s only one thing to keep in mind: keep good form at all times.

The Moves:

The 24-Minute At-Home Boot Camp

9 Ways To Amp-Up A Push-Up

All-Over Toner: Boot Camp Buffers 

Your 4 Move, No-Equipment Circuit

Firm Up Fast

The Gear:

Wear: Classes feature a variety of exercises—lateral jumps, squats, high knees—so you need a pair of sneaker that’s ready for anything. Look for training sneakers instead of running shoes as they tend to have extra traction built into high-impact areas such as below the ball of your foot. When it comes to your apparel, think comfort and avoid cotton as the material will begin to feel heavy when drenched with sweat.

Credits: Ultimate Racerback (Kira Grace, available 1/20), Free To Play Crop (Yogasmoga, $84), Women’s Limited Edition Harley Pasternak Zero (New Balance, $89.99).

Use: Foam rolling will help ease muscle tightness, so you can bounce back from tough workouts faster.

Credits: GRID Foam Roller (TriggerPoint, $39.99).

Try: Whether you’re exercising at home or at your favorite studio, you’re going to sweat. Keep a water bottle handy to help you stay hydrated.

Credits: Green With Envy (S’well, $45).