People spend too long in the gym

Cause you have to pay for it and travel there - people feel obliged to be in the gym for like 90 minutes

I live next door to one and am rarely in there more than 10 minutes - even just doing pull ups every second day would give you a nice physique after 6 months or something

If you enjoy being in there that's fine - but a lot of beginners are walking around with their notepads trying to follow some complex routine and lose interest, when all you really need to do is one exercise to failure once a day

Also, minimizing unnecessary aches and pains is also important for beginners