Want to fire up your core? Celebrity trainer Jeanette Jenkins shared these 13 plank variations on Instagram (12 plus a bonus exercise!) that target your abs and back. You'll do variations on both hands, on one hand, with lots of leg lifts, jumps, and arm taps to target all the different muscles of your core.
Equipment needed: none
Directions: After a warmup, Jenkins said, "Try a few of these plank variations or try them all." Complete each move for 30 to 60 seconds or 10 to 15 reps, she said; perform one to three sets in total. Finish with these ab stretches for a cooldown.
Looking for more bodyweight workouts? Try this 10-move bodyweight HIIT circuit from Jenkins.