What do you have the hardest time asking for?

I have he hardest time asking for help. I'm rather stubborn when it comes to getting things done and I usually taking on more than I can handle. However, I usually look at it as a challenge to complete so I usually end up overworking myself when I don't really need to. At school, I never asked teachers for help and just dwelled on the problem until I figured it out for myself. It did help my problem solving and connection making better than a teacher probably would, but I could get extremely frustrated. Another example of not asking for help is when I have to lift something extremely heavy. My job has a lof of lifting and carrying, a good 80% I can carry it by myself but the other 20% or so I either need someone to help me carry it because it's a two person job anyways or I just can't lift it. Being female, I'm pretty stronger than normal but I don't work out enough to compare to natuarl male strength that is developed through this job. Asking for help makes me feel weak and that's one thing I hate. Though, weighing my options, I would rather ask for help than get injured.