Yes physical fitness is essential for construction crafts . Fitness will help in preventing stress and strain injuries. Construction workers perform alot of heavy lifting . Always make sure to take care of your back. Always lift with your legs so that you don’t strain your back lifting repetitive or heavy objects.
If your employer doesn’t encourage safe or team lifting then you might want to look for a better employer.
I hope that this helps, always work safely so that you can return home to your family at the end of the work day. Please just remember that you only have one back to get you through your whole career.Good Luck
Although it’s not required for this career, it is recommended to keep up your endurance on the job. Staying fit, will make any job requiring physical labor easier on your body. Always remember to hydrate as well when working to keep your muscles from hurting at the end of the day.
Good luck in your career !