Abstract
Free applications to evaluate certain fitness or performance parameters are becoming widely used. The Sit2Stand is an open-source web based tool that is becoming increasingly popular and may have utility for clinical purposes. PURPOSE: To explore the reliability of this open source tool for time, acceleration, and flexion during the sit-2-stand test. METHODS: Participants (n=29, age=29.6±15.1 yrs, ht=165.7±8.8 cm, wt=68.4±18.3 kg) performed a 5-repetition sit-2-stand test two times while filmed with an iPhone (Ph1) and phone using Android (Ph2). Participant were instructed to cross arms and to stand all the way up and sit back on the chair as quickly and safely as possible. Repeated measures ANOVA were used to assess differences for each variable. Pearson’s correlation was used to assess interclass reliability. Alpha was set at .05 for all tests. RESULTS: There were no significant difference between phones and trials for time (F(3, 26) = 1.3, p = 0.281) and acceleration (F(3, 26) = 1.6, p = 0.198). There was a significant difference between phones within trials, F(3, 26) = 21.5, p = 0.001. Ph1 (29.7±10.0 degrees) was significantly lower than Ph2 (32.5±9.5), p = 0.001 for trial 1 as well as trial 2 (28.7±9.0 and 31.0±8.4 degrees, respectively), p = 0.001. There was very strong to moderate reliability between trials for both phones in time and flexion but not for acceleration using Ph1, which was weak reliability and not significant (rxx=0.28, p=0.130). CONCLUSION: While this study adhered to the parameters for camera placement, differences between phones may have contributed to these findings. Although phones were placed side by side, parallax (scaling) error may be a reason for differences in flexion between phones. Due to significant reliability in some parameters, this no-cost, readily-available tool may be of use those in a clinical setting.
Recommended Citation
Barnard, Kylie J.; McCarty, Ceanna M.; Guerra, Gary; and Smith, John D.
(2025)
"Interclass Reliability of Sit2Stand.ai,"
International Journal of Exercise Science: Conference Proceedings: Vol. 2:
Iss.
17, Article 126.
Available at:
https://digitalcommons.wku.edu/ijesab/vol2/iss17/126
Included in
Health and Physical Education Commons, Medical Education Commons, Sports Sciences Commons
