Types - High-Impact Interval Training (HIIT)

There's aerobic/cardio, strength training/weights, flexibility and stretching, high-impact interval training, CrossFit, and more. 
- High-Impact Interval Training (HIIT). HIIT is done with no equipment and combines cardio and strength training alternating in short, intense bursts of activity to increase your heart rate with periods of rest or lower-intensity exercise. The variety of exercises allows focus on different areas of your body and is vital. HIIT improves your metabolism and helps with fat loss, making it a popular choice for those looking to lose weight. 
*Quick example: A four-exercise workout, each performed for 40 seconds with 20 seconds rest between exercises.  After you complete the 4-minute circuit, rest for 2 minutes, and do it two more times:
*** Jumping Jacks
*** Bodyweight squats
*** Mountain Climbers
*** Burpees 
Adjust the duration and intensity based on your fitness, and listen to your body. If you have concerns, check with your doctor, the one you just made the appointment to see .

There are plenty of HIIT flavors out there.  Here's a link to get you started. Warning: You're gonna sweat.