If you are pressed for time and space, here is a quick workout that will take you 18 minutes to complete and leave you feeling totally spent.
Use a stopwatch to time 50 seconds of work and 10 seconds of rest... complete exercises 1-5 and give yourself a 1 minute break at the end of each set. Repeat 3 times.
1- Split Jumps- Start with your left foot forward and your right foot behind you, keeping your back up straight dip your back knee to the floor, spring up and while in the air bring your left foot to the back and the right foot to the front. Land in the original split stance and repeat.
2- Push-ups- Either with your knees or toes on the floor, ensure your abs are tight, your arms bend to a 90' angle with the floor, and your chest leads before your belly.
3- Burpees- Start with your hands on the floor, kick your legs out behind you and then quickly back in while maintaining a tight core, stand up and jump as high as you can vertically and repeat.
4- High Knees- Run on the spot while bringing your knees up as high as you can.
5- Starfish Sit-Ups- Start lying face up with both arms above your head and legs out so you resemble a "star" shape... Keeping your left arm and right leg on the floor bring your right arm to touch your left toe in a crunch. Repeat of opposite side.