I think they can best protect themselves from sun exposure by wearing protective clothing.
The accurate answer to this query is True.
I hope this clarifies!
The question posed is whether it’s true that only professional assessments can effectively determine an individual's health-related fitness levels. This query lacks a definitive answer because, while professional evaluations are generally the best—due to necessary education and expertise—self-administered tests can also provide valuable insights, like testing one’s capacity to run for three minutes without fatigue, indicating some non-professional assessments may also yield reliable results.