M any of us, regardless of our age or fitness levels, know that we should be doing more exercise but are unsure where to start. So what is the ultimate exercise for improving health, longevity and general wellbeing? Here, personal trainers share the best moves, whatever your individual needs or abilities. Deadlift Rachael Tate , Norfolk ‘The king of exercises.’ Photograph: Posed by model; martin-dm/Getty Images “The deadlift is the king of exercises, because it is a compound move that recruits many muscles, right from the feet to the grip and the whole back of the body. It is also comparable to real life: it is a movement we use when we’re picking up something heavy. “You want to have a really flat back and engaged core, and then you’re hinging at the hips so that you can pick up dumbbells or a barbell – or even buckets of water – off the floor and stand up straight. “First, find the movement without a weight. Make sure that you’re feeling it in the back of your body.…