At any sign of pain a chiropractor is a good choice to see for help. It is true that some pains are just a simple muscle strain and chiropractic may not help it. But Doctors of Chiropractic are thoroughly trained to know the difference between a muscle issue and misalignment or subluxation causing the pain.
One thing to note is that a person who continually strains their back, even for a “good reason” like they work outside a lot, usually has an underlying biomechanical problem that makes them more susceptible to re-straining their muscles. A doctor trained in CBP technique is best suited to locate and correct any underlying problem.