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It's important to warm up your muscles before getting into the splits. Perform about 15 minutes of cardio to warm up your muscles. There are many options for cardio so do what you enjoy so you don't get bored by the repetition. Whether you enjoy jumping jacks, climbing stairs, or jogging, get your muscles to loosen up and slowly work them up to more vigorous movements. Increase the intensity of your warm up with jump rope, squats, or box jumps to get your blood flowing in your legs. Form a bridge by lying with your back on the floor and trying to push yourself up on your feet and hands. Your knees should be bent with your palms and feet planted on the ground. You should try to form a bridge by lifting your back as far from the ground as you can by pushing down through your feet and hands. Point your elbows to the ceiling and feel your back stretch. It may be difficult at first but with time and practice your flexibility will increase. Don't force anything if you start to feel pain. Push yourself to feel a stretch but don't push so far that you feel pain. Use the runner's stretch for your lower body. Get into the lunge position by taking a step forward. Bring your fingertips as low as you can. Raise your butt by slowly straightening your front leg. Inhale as you straighten your leg. Feel your front leg stretch and exhale. Get back into the starting lunge position and repeat. Repeat the runners stretch for both legs, repeating 4x per leg. Perform a standing side stretch by reaching over your head, grip your fingers together but extend your pointer fingers and keep them together. Stretch and inhale as you get as long as you can while bending to one side. Take a deep and slow breath as you hold your pose for 5 seconds then return to a tall, standing position with your arms above your head. Make sure to perform the standing side stretch on both sides of your body.
Perform cardio exercises. Stretch your back. Stretch your lower body. Stretch your upper body.