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      Feasibility of a Tai Chi with Thera-Band Training Program: A Pilot Study

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          Abstract

          Tai Chi, combined with Thera-band (TCTB) exercise may be associated with an improvement in health where it increases physical fitness, improves psychological well-being, and decreases pain. This paper aimed to determine the feasibility of TCTB exercise in older sedentary office workers. Forty office workers aged over 55 years participated in a pilot randomized controlled trial (i.e., 12-week TCTB exercise or Tai Chi exercise only). Feasibility of the TCTB exercise approach was ascertained through the recruitment and enrolment rate, acceptability of the study intervention by participants including retention and adherence rates, participants’ learning process, the appropriateness of data collection as well as the participants’ evaluation of the intervention. Recruitment took longer than planned, with a low recruitment rate of 2.0% (42/2020), but a high enrolment rate of 95.2% (40/42). Thirty-one participants (i.e., 77.5%) completed the intervention. Of those who completed the trial, the overall average attendance was reported as 85.2%; 84.7% in the TCTB group and 85.7% in the Tai Chi only group. A total of 58.3% of participants ( n = 21) could independently practice the TCTB or Tai Chi exercise motions at the end of the learning stage. There were no missing data except for the nine participants who withdrew during the intervention. No adverse events or effects were reported, and all participants were satisfied with the 12-week exercise intervention. Results support the feasibility of a large-scale randomized controlled trial to explore the efficacy of a TCTB program for improving health in older sedentary office workers.

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          Estimating the sample size for a pilot randomised trial to minimise the overall trial sample size for the external pilot and main trial for a continuous outcome variable

          Sample size justification is an important consideration when planning a clinical trial, not only for the main trial but also for any preliminary pilot trial. When the outcome is a continuous variable, the sample size calculation requires an accurate estimate of the standard deviation of the outcome measure. A pilot trial can be used to get an estimate of the standard deviation, which could then be used to anticipate what may be observed in the main trial. However, an important consideration is that pilot trials often estimate the standard deviation parameter imprecisely. This paper looks at how we can choose an external pilot trial sample size in order to minimise the sample size of the overall clinical trial programme, that is, the pilot and the main trial together. We produce a method of calculating the optimal solution to the required pilot trial sample size when the standardised effect size for the main trial is known. However, as it may not be possible to know the standardised effect size to be used prior to the pilot trial, approximate rules are also presented. For a main trial designed with 90% power and two-sided 5% significance, we recommend pilot trial sample sizes per treatment arm of 75, 25, 15 and 10 for standardised effect sizes that are extra small (≤0.1), small (0.2), medium (0.5) or large (0.8), respectively.
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            A systematic review and meta-analysis of workplace intervention strategies to reduce sedentary time in white-collar workers.

            Prolonged sedentary behaviour has been associated with various detrimental health risks. Workplace sitting is particularly important, providing it occupies majority of total daily sedentary behaviour among desk-based employees. The aim of this systematic review and meta-analysis was to examine the effectiveness of workplace interventions overall, and according to different intervention strategies (educational/behavioural, environmental and multi-component interventions) for reducing sitting among white-collar working adults. Articles published through December 2015 were identified in five online databases and manual searches. Twenty-six controlled intervention studies published between 2003 and 2015 of 4568 working adults were included. All 26 studies were presented qualitatively, and 21 studies with a control group without any intervention were included in the meta-analysis. The pooled intervention effect showed a significant workplace sitting reduction of -39.6 min/8-h workday (95% confidence interval [CI]: -51.7, -27.5), favouring the intervention group. Multi-component interventions reported the greatest workplace sitting reduction (-88.8 min/8-h workday; 95% CI: -132.7, -44.9), followed by environmental (-72.8 min/8-h workday; 95% CI: -104.9, -40.6) and educational/behavioural strategies -15.5 min/8-h workday (95% CI:-22.9,-8.2). Our study found consistent evidence for intervention effectiveness in reducing workplace sitting, particularly for multi-component and environmental strategies. Methodologically rigorous studies using standardized and objectively determined outcomes are warranted. © 2016 World Obesity.
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              Tai chi: physiological characteristics and beneficial effects on health.

              To assess the characteristic effects of Tai Chi Chuan (TCC) exercise on metabolism and cardiorespiratory response, and to measure its effect on cardiorespiratory function, mental control, immune capacity, and the prevention of falls in elderly people. A review of controlled experimental studies and clinical trials designed with one of two aims: either to assess physiological responses during the performance of TCC or to assess the impact of this exercise on general health and fitness. Metabolic rate, heart rate, blood pressure, ventilation, maximal oxygen uptake (VO(2)MAX), immune capacity, falls, and fall related factors. A total of 2216 men and women. Under review were 31 original studies, published in Chinese or English journals, that met the criteria for inclusion. Most of the papers written in Chinese had not been introduced into the Western literature. Nine of these studies showed that TCC can be classified as moderate exercise, as its does not demand more than 55% of maximal oxygen intake. When this form of exercise and others conducted at equal intensity were compared, TCC showed a significantly lower ventilatory equivalent (VE/VO(2)MAX). Evidence provided by cross sectional and longitudinal studies suggests that TCC exercise has beneficial effects on cardiorespiratory and musculoskeletal function, posture control capacity, and the reduction of falls experienced by the elderly. TCC is a moderate intensity exercise that is beneficial to cardiorespiratory function, immune capacity, mental control, flexibility, and balance control; it improves muscle strength and reduces the risk of falls in the elderly.
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                Author and article information

                Journal
                Int J Environ Res Public Health
                Int J Environ Res Public Health
                ijerph
                International Journal of Environmental Research and Public Health
                MDPI
                1661-7827
                1660-4601
                16 November 2020
                November 2020
                : 17
                : 22
                : 8462
                Affiliations
                [1 ]School of Nursing, Shandong University, Jinan 250012, China
                [2 ]Nathan Campus, Menzies Health Institute Queensland, Griffith University, Brisbane, QLD 4111, Australia; w.moyle@ 123456griffith.edu.au (W.M.); cjones@ 123456bond.edu.au (C.J.); b.weeks@ 123456griffith.edu.au (B.W.)
                [3 ]Nathan Campus, School of Nursing and Midwifery, Griffith University, Brisbane, QLD 4111, Australia
                [4 ]Faculty of Health Sciences & Medicine, Bond University, Gold Coast, QLD 4226, Australia
                [5 ]Gold Coast Campus, School of Allied Health Sciences, Griffith University, Gold Coast, QLD 4222, Australia
                Author notes
                [* ]Correspondence: meiling.qi@ 123456sdu.edu.cn ; Tel.: +86-531-8838-2268
                Author information
                https://orcid.org/0000-0001-8007-1332
                https://orcid.org/0000-0003-3004-9019
                https://orcid.org/0000-0002-7249-2580
                Article
                ijerph-17-08462
                10.3390/ijerph17228462
                7696740
                33207580
                a2b11a71-d77d-498a-b8cd-0440040a3b50
                © 2020 by the authors.

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

                History
                : 15 September 2020
                : 12 November 2020
                Categories
                Article

                Public health
                strength training,tai chi,feasibility,physical fitness,psychological well-being,older sedentary office workers

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