Tell us if this sounds familiar: You want to work out, but you’re tight on time and don’t know where to start. The struggle is real!

When it comes to quick workouts, it’s best to plan ahead. And who better to get a time-crunched workout from than a top trainer? We asked several to share their go-to routine when they only have 15 minutes. Now you’ve got six great options—and only two that require equipment.

Benjamin Wegman: 3 Bodyweight Moves to Build Strength

Wegman is a trainer at The Fhitting Room in New York City.Workout In 10 minutes, complete 20 reps of each move below and as many rounds of the circuit as possible.Push-Up Sit-UpSquatFor the last 5 minutes, complete 10 burpees every minute on the minute. In other words, perform 10 burpees in 60 seconds, resting for any remaining time in the minute. At the start of the next minute, perform 10 burpees again.

Adam Rosante: 5 Rounds of 5 Moves to Spike Your Heart Rate

Rosante is an NYC-based trainer, founder of The People’s Bootcamp, and author of The 30-Second Body.Workout Perform each move for 30 seconds. At the end of all 5 moves, rest for 30 seconds. You’ll complete the entire circuit 5 times in 15 minutes. Jump Squat Push-Up Lunge Mountain ClimberForearm Plank

Astrid Swan: The Countdown Workout

Swan is a celebrity trainer based in Los Angeles who has worked with Julianne Hough and Kimberly Stewart. Workout Start by performing 10 reps of each exercise, then do 9, then 8, etc., until you perform 1 rep of each exercise, and you’re done. Burpee to Box Jump Lateral Shuffle Jump Lunge Push-Up

Rob Sulaver: The Ultimate Stair Workout

Sulaver is the founder of Bandana Training.Workout Spend 3 minutes warming up your calves, quads, and glutes with exercises of your choice.Sprint up 5 flights of stairs. Walk back down. Repeat for 10 rounds (or as much as you can do in 15 minutes).

Tim Hartwig: The Quick Gym Workout

Hartwig is a trainer in L.A. who has worked with Sloane Stevens, Antonio Brown, and Rob Gronkowski.Workout You’ll need: A kettlebell and a rowing machine Complete as many rounds as possible of the circuit below in 15 minutes. 500-meter Row (Aim for a time of 1:40 or faster) 15 Kettlebell Swing 60 seconds Rest

Brett Hoebel: A Total-Body Dumbbell Workout

Hoebel, a former trainer on NBC’s The Biggest Loser and the creator of The 20 Minute Body, is based in L.A. Workout You’ll need: A set of dumbbells Perform each move for 60 seconds. After completing all 3 moves, rest for 60 seconds. Repeat the circuit 4 times. Squat-to-Overhead Press (With Dumbbells) Renegade Row (With Dumbbells) Sit-Ups