What are some good exercises you can do to strengthen your core?

I assume that you are starting from entry level and not seeking a more advanced set of exercises. These are my six tips, not as an expert but based on my personal observation and experience. Actually my "zero tip" is ask an expert - that is if you afford a trainer or gym instructor: Tip 1: Don't try to be a body builder or get confused by wanting "six packs" as these are attractive but not the "core strength" that you need - you need much more interior muscle development. Tip 2: Don't get stuck on needing or doing lots of situps and "crunches" as these can harm your lower back if not done correctly and will not always build your core. Tip 3: Do focus on doing the exercises slowly and concentrate on the "target muscle area" as mental concentration on the target muscle helps deliver the result and helps you reinforce good technique by internal feedback. Tip 4: Start doing "Planks" and "Side Planks" as your core group of exercises - google or YouTube for these and you'll find many examples of how to start. You can do these at home or the gym with equally good results. Tip 5: If you like classes with a core body strength routine check out Pilates, some Yoga classes, Fit Ball or Body Balance - google these and you will find examples of the sequences. Tip 6: As you gain strength and confidence keep increasing the intensity and also keep changing the sequence or pattern of doing your exercises every 6 to 8 weeks. Otherwise your muscles develop a strong "memory" and learn get into a relaxed groove with ever-decreasing benefits for your time. You need to keep shocking them with change to get the best results for your efforts. Walter Adamson http://twitter.com/dawnweslept