Pullups are hands-down the best exercise for your upper back. It could even be argued that it's one of the best exercises for the human body. But for many beginners, hoisting their body weight doesn't always come easy, not even for a measely one-rep. If you're just starting out and want to step up your fitness game, here's your guide.
Start by doing iso-eccentric pullups. Grab onto a bar and jump up so your chest touches it. Try to hold that position for five seconds. If you can, take five seconds to lower yourself back down. (If you can't, keep working at the hold until you can.) If you can lower yourself with control, perform another rep. When you can bang out 10 reps in this fashion, you'll be able to do atleast one regular pullup.