Timed Up and Go (TUG) Test
The Timed Up and Go test times a person standing from a chair, walking three metres, turning and sitting down again; twelve seconds or more suggests a mobility problem worth addressing.
Plain English
Patient-Friendly Explanation
The Timed Up and Go test is one of the simplest functional tests in medicine. A person sits in a standard armchair, and a line is marked on the floor three metres in front of it. On the word go, they stand up, walk to the line at their usual pace, turn around, walk back and sit down, while someone times the whole sequence with a stopwatch. The person wears their normal shoes and uses their usual walking aid if they have one. The test was described in 1991 by Canadian researchers Podsiadlo and Richardson, and it has since become one of the most widely used measures of mobility in the world. The reason it matters in a weight clinic is that mobility and weight are closely connected. In a small study comparing people with severe obesity who were waiting for weight-loss surgery with lean volunteers of the same age and sex, the group with obesity took noticeably longer to complete the test - about nine and a half seconds against about eight. In another study of older patients with severe obesity, half of them needed more than ten seconds, and the slowest times were seen in those with the largest body mass index. The test is useful in both directions. As weight comes down and fitness improves, the time usually shortens, which is encouraging feedback that the scales do not always give. But if weight is falling quickly and the time is getting slower, that is a signal that muscle is being lost too, and that protein intake, resistance exercise and a review of the diet are needed. Interpretation is straightforward but should not be over-read: twelve seconds is the threshold used by the United States Centers for Disease Control and Prevention to flag a raised risk of falls in older adults, while other studies use thirteen and a half seconds, and some use ten. It is a screening measure that points to the need for a closer look, not a diagnosis. It is also worth knowing that it can be done at home with a chair, a tape measure, some floor space and a phone timer, which makes it easy to repeat every few months.
Medical
Clinical Definition
The Timed Up and Go (TUG) test was described by Podsiadlo and Richardson in 1991 as a timed modification of the earlier Get Up and Go test. The subject rises from a standard armchair with a seat height of approximately 46 cm, walks at a comfortable and safe pace to a line three metres away, turns, returns to the chair and sits down, with the time recorded from the instruction to go until the subject is seated; usual footwear and customary walking aid are permitted and a familiarisation trial is standard. The Centers for Disease Control and Prevention STEADI programme uses a threshold of 12 seconds or more as indicating increased falls risk, while the commonly cited community threshold is 13.5 seconds and reported cut-offs range from 10 to 33 seconds depending on the population and the reference standard. Test-retest reliability is good and the test requires only a chair, a tape measure and a stopwatch. Its discriminative accuracy for falls is limited: a systematic review and meta-analysis of 25 studies using the 13.5-second cut-off found pooled sensitivity of 0.31 (95% CI 0.13-0.57) and specificity of 0.74 (0.52-0.88), with an area under the curve of 0.57, and the authors concluded that it should not be used alone to identify community-dwelling older adults at risk of falling; in hospitalised older adults, however, a TUG of 12 seconds or more with inability to complete the test predicted significant functional decline over admission. In obesity, TUG times are longer: ten patients with morbid obesity awaiting bariatric surgery averaged 9.33 +/- 1.23 seconds against 7.85 +/- 1.73 seconds in ten age- and sex-matched lean controls (p=0.04), alongside poorer dynamic balance on the modified Y-balance test and lower strength relative to body mass. In 40 patients aged 60 or over with a body mass index of 35 kg/m2 or more, 50 per cent took longer than 10 seconds, and a TUG above 10 seconds correlated with a body mass index above 51 kg/m2 (p<0.05) and with dependency in activities of daily living. TUG is commonly used alongside gait speed, handgrip strength and the Short Physical Performance Battery in the assessment of sarcopenia and frailty, and is interpreted with attention to pain, joint disease, cognition and the use of walking aids.
Key Insight
Why It Matters
A chair, a stopwatch and three metres of floor produce a number that reflects how a person actually functions day to day - and tracking it through a weight programme shows whether the weight coming off is fat or muscle.
Sources
Reviewed against standard medical references.
Medically reviewed by
Family Physician & Registered Acupuncturist, Accord Medical Clinic. MBBS (NUS), Graduate Diploma in Family Medicine (NUS), Graduate Diploma in Acupuncture (Singapore College of TCM).
Last reviewed: October 2026
This page is general health education, not medical advice. Whether any treatment is appropriate for you is a decision made in consultation after assessment.
