injury and an unstable knee. The absence of those oscillations during flexor muscles test support the hypothesis of an unstable knee produced by an insufficient ACL. A steady torque pattern may represent a stable knee and/or functional ACL and, therefore, a possible candidate for nonsurgical treatment
Search Results
Diagnostic Validity of an Isokinetic Testing to Identify Partial Anterior Cruciate Ligament Injuries
Robson Dias Scoz, Cesar F. Amorim, Bruno O.A. Mazziotti, Rubens A. Da Silva, Edgar R. Vieira, Alexandre D. Lopes, and Ronaldo E.C.D. Gabriel
Effectiveness of Fitbit Activity Prompts in Reducing Sitting Time and Increasing Physical Activity in University Employees: A Randomized Controlled Trial
Benjamin D. Boudreaux, Julie A. Schenck, Zhixuan Chu, and Michael D. Schmidt
, representing 56.1% and 57.1% of device wear time. Mean sitting time increased in the Prompt group (+0.66 hr/day) from baseline to follow-up, while sitting time remained stable in the No Prompt group (−0.04 hr/day), but these changes were not significantly different within groups (Prompt: p = .15 and No
Effects of Different Conditioning Activities on the Sprint Performance of Elite Sprinters: A Systematic Review With Meta-Analysis
Irineu Loturco, Lucas A. Pereira, Túlio B.M.A. Moura, Michael R. McGuigan, and Daniel Boullosa
practices. 8 In this regard, a series of recent survey studies have been conducted with the aim of describing and critically analyzing the training practices adopted by elite sprint coaches. 8 – 10 Additionally, it has been shown that sprint speed is a highly stable physical capacity, exhibiting minimal
Eleven Years’ Monitoring of the World’s Most Successful Male Biathlete of the Last Decade
Laurent Schmitt, Stéphane Bouthiaux, and Grégoire P. Millet
[284] to 2910 [342] ms 2 ) increased until 2015 and were stable over 2016–2018 but decreased in 2019 (94 [28] ms; 1815 [821] ms 2 ). Similarly, the supine HR decreased from 44.4 [3.4] to 33.5 [1.7] bpm in 2018 but increased in 2019 (35.9 [1.8] bpm). The ratio of HF·HR −1 measured in the supine
A Methodological Comparison of Protocols and Analytical Techniques to Assess the Outcome Measures of Submaximal Fitness Tests
Tzlil Shushan, Ric Lovell, Shaun J. McLaren, Steve Barrett, Martin Buchheit, Tannath J. Scott, and Dean Norris
to moderate constant intensity. 3 This approach promotes a stable HR response 3 and serves as a valid surrogate marker of current status and chronic changes in aerobic capacity. 4 , 5 Also, the use of accelerometry data derived from microelectrical mechanical systems (MEMS) has been proposed to
Changes in Accelerometer-Measured Physical Activity and Sedentary Time Across Retirement Transition as a Predictor of Self-Rated Health
Andreas Fröberg, Lawrence Sacco, Kristin Suorsa, Tuija Leskinen, Pasan Hettiarachchi, Magnus Svartengren, Sari Stenholm, and Hugo Westerlund
, 71 to 78) minutes, and sedentary time 587 (CI, 575 to 598) minutes. Between wave 1 and wave 2, total PA decreased with 11 (CI, −22 to −1) minutes, MVPA was stable (0 [CI, −3 to 3] min/d), and sedentary time decreased nonsignificantly with 9 (CI, −20 to 1) minutes. Table 2 Descriptive Data for Total
Stiffness Adaptations in Shod Running
Caroline Divert, Heiner Baur, Guillaume Mornieux, Frank Mayer, and Alain Belli
When mechanical parameters of running are measured, runners have to be accustomed to testing conditions. Nevertheless, habituated runners could still show slight evolutions of their patterns at the beginning of each new running bout. This study investigated runners' stiffness adjustments during shoe and barefoot running and stiffness evolutions of shoes. Twenty-two runners performed two 4-minute bouts at 3.61 m·s–1 shod and barefoot after a 4-min warm-up period. Vertical and leg stiffness decreased during the shoe condition but remained stable in the barefoot condition, p < 0.001. Moreover, an impactor test showed that shoe stiffness increased significantly during the first 4 minutes, p < 0.001. Beyond the 4th minute, shoe properties remained stable. Even if runners were accustomed to the testing condition, as running pattern remained stable during barefoot running, they adjusted their leg and vertical stiffness during shoe running. Moreover, as measurements were taken after a 4-min warm-up period, it could be assumed that shoe properties were stable. Then the stiffness adjustment observed during shoe running might be due to further habituations of the runners to the shod condition. To conclude, it makes sense to run at least 4 minutes before taking measurements in order to avoid runners' stiffness alteration due to shoe property modifications. However, runners could still adapt to the shoe.
Association of Longitudinal Changes of Physical Activity on Smoking Cessation Among Young Daily Smokers
Paul D. Loprinzi and Jerome F. Walker
Objective:
To our knowledge, no longitudinal epidemiological study among daily smokers has examined the effects of physical activity change/trajectory on smoking cessation. The purpose of this study was to examine the longitudinal effects of changes in physical activity on smoking cessation among a national sample of young (16–24 y) daily smokers.
Methods:
Data from the 2003–2005 National Youth Smoking Cessation Survey were used (N = 1178). Using hierarchical agglomerative cluster analysis, 5 distinct self-reported physical activity trajectories over 3 time periods (baseline, 12-month, and 24-month follow-up) were observed, including stable low physical activity, decreasing physical activity, curvilinear physical activity, stable high physical activity, and increasing physical activity. Nicotine dependence (Heaviness of Smoking Index) and demographic parameters were assessed via survey.
Results:
With stable low physical activity (16.2% quit smoking) serving as the referent group, those in the stable high physical activity (24.8% quit smoking) group had 1.8 greater odds of not smoking at the 24-month follow-up period (odds ratio = 1.81; 95% confidence interval, 1.12–2.91) after adjusting for nicotine dependence, age, gender, race-ethnicity, and education.
Conclusions:
Maintenance of regular physical activity among young daily smokers may help to facilitate smoking cessation.
Annual Volume and Distribution of Physical Training in Norwegian Female Cross-Country Skiers and Biathletes: A Comparison Between Sports, Competition Levels, and Age Categories—The FENDURA Project
John O. Osborne, Guro S. Solli, Tina P. Engseth, Boye Welde, Bente Morseth, Dionne A. Noordhof, Øyvind Sandbakk, and Erik P. Andersson
stable in GP1 and GP2, before decreasing to SP ( P = .002–.003; d = 0.59–0.86) for seniors of both sports and decreasing again to CP for senior XC skiers ( P = .001; d = 0.62; see Figure 2 ). Conversely, volume remains relatively consistent across all phases for juniors of both sports. Accordingly
Longitudinal Analysis of Patterns and Correlates of Physical Activity and Sedentary Behavior in Women From Preconception to Postpartum: The Singapore Preconception Study of Long-Term Maternal and Child Outcomes Cohort
Anne H.Y. Chu, Natarajan Padmapriya, Shuen Lin Tan, Claire Marie J.L. Goh, Yap-Seng Chong, Lynette P. Shek, Kok Hian Tan, Peter D. Gluckman, Fabian K.P. Yap, Yung Seng Lee, See Ling Loy, Jerry K.Y. Chan, Keith M. Godfrey, Johan G. Eriksson, Shiao-Yng Chan, Jonathan Y. Bernard, and Falk Müller-Riemenschneider
time remained stable during preconception and pregnancy but decreased postpartum. Furthermore, different correlates were linked to PA and sedentary behavior at distinct life stages. Women with higher overall walking time were employed, those with higher overall MVPA were non-Chinese, and those with
