Ozden F, , et al. - This study was intended to ascertain the test-retest reliability and concurrent validity of the five times sit to stand test (FTST) and step test (ST) in older adults with total hip arthroplasty (THA). Researchers performed a cross-sectional and prospective study including a total of 32 unilateral total hip arthroplasty patients. They assessed FTST, ST, and Timed Up & Go Test at the first evaluation session. In older adults with primary unilateral THA, the results considered that FTST and ST are valid and reliable performance tests.