A buddy tells you that during her last workout, she performed 100 crunches and 75 bent over dumbbell rows, in record time. Impressive? Well yes, you have to admire this person’s mental and physical stamina. At the gym, you notice a guy going 100 miles an hour on the leg extension machine. But is this the best way to train? There’s good reason to say that the answer is no. Performing 100 crunches may add strength to your abs, but I can think of many other core moves that …
