Please choose the correct ending to complete the given sentence: Health: [header] How to loosen joints with exercise [title] Try tai chi. [step] One of the best exercises that you can do to loosen your joints is tai chi. In fact, one of the sought after benefits of tai chi is the ability to keep joints loose and flexible.

Ending1: [substeps] Tai chi is an ancient chinese exercise that was designed to help calm and focus your mind while reducing stress and loosening stiff joints. If you want to loosen your joints, try starting with tai chi. Ending2: Practicing tai chi can also help to ease aches and pains associated with arthritis as well as encourage joint flexibility. [substeps] When walking, find a warm, low energy position on a treadmill or stationary bicycle. Ending3: Tai chi is also useful for warming up and releasing tension that's often associated with stiffness or tension in joints. The following may help loosen joints from this stress : [substeps] Sit on a chair with your feet flat on the floor and your hands and knees pulled in close to you. Ending4: The hip flexors, which hold your torso at a comfortable length, can help loosen joints. The knee flexors, which keep your knees straight during poses, can also help loosen joints.

Answer format: ending1/ending2/ending3/ending4