But a mere six weeks later those vowing to hit the gym and improve their health start dropping like flies.
"I would see them come every single day. Then by the next week I wouldn't see them anymore," said Shane Summers, trainer at Gold’s Gym.
Fitness trainers say by February the drive to get fit has faded away.
"When they see the first two weeks, and they see no results they quit. And when they see other people and their own condition then they give up very easily," said Summers.
Trainers at Gold's Gym are encouraging people to tough it out and keep exercising.
"It's not just a place to work out but it's a nice atmosphere to meet new people. It’s a great thing people should stick with it," said Carrington Jones, a Gold's Gym member.
Summers believes having a specific plan and someone to train with is key to staying motivated.
"Get them with a trainer, get them with a nutrition plan, and get them with a fitness plan so they can stick with it," said Summers.
On Tuesday, Gold's Gym across the nation opened its doors free to the public in an effort to encourage people to keep their resolution and get fit.