Experts offer their favorite moves for making the most of your workout time. Experts say there is no magic to exercise: You get out of it what you put in. That doesn’t mean you have to work out for hours each day. It just means you need to work smart. That said, experts agree that not all exercises are created equal. Some are simply more efficient than others, whether they target multiple muscle groups, are suitable for a wide variety of fitness levels, or help you burn calories more effectively. So what are the best exercises? We posed this question to four fitness experts and compiled a list of their favorites.