The low back is a problem area for a lot of people who sit too long in their office chair without moving. These are the best exercises to relieve low back pain either from being sedentary or from working out without proper stretching.
If you want to lose weight, forget cardio and try these HIIT training workouts instead! They are more productive, can be done in half the time, and are so convenient to do. I've definitely noticed an increase in weight loss since I've started doing these