As new research suggests that core strength and muscle are more important for long-term fitness than aerobic exercise, Harry Bullmore investigates what the perfect workout plan should look like as we age W alking is brilliant. It’s accessible, affordable and enjoyable, plus it comes with many health benefits, which is why it forms the backbone of most government exercise guidance. But it is strength that underpins all movement. If you don’t have the strength to get out of your chair and put one