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567 results on '"Klenk, Jochen"'

1. Accurate and Efficient Real-World Fall Detection Using Time Series Techniques

Author

Aderinola, Timilehin B., Palmerini, Luca, D’Ascanio, Ilaria, Chiari, Lorenzo, Klenk, Jochen, Becker, Clemens, Caulfield, Brian, Ifrim, Georgiana, Goos, Gerhard, Series Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Lemaire, Vincent, editor, Ifrim, Georgiana, editor, Bagnall, Anthony, editor, Guyet, Thomas, editor, Malinowski, Simon, editor, Schäfer, Patrick, editor, and Tavenard, Romain, editor

Published
2025
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6. Validity of the Sedentary Behavior Questionnaire in European Older Adults Using English, Spanish, German and Danish Versions

Author

Sansano-Nadal, Oriol, Wilson, Jason J., Martín-Borràs, Carme, Brønd, Jan Christian, Skjødt, Mathias, Caserotti, Paolo, Roqué I. Figuls, Marta, Blackburn, Nicole E., Klenk, Jochen, Rothenbacher, Dietrich, Guerra-Balic, Myriam, Font-Farré, Manel, Denkinger, Michael, Coll-Planas, Laura, Deidda, Manuela, McIntosh, Emma, Giné-Garriga, Maria, and Tully, Mark A.

Abstract

The main aim of this study was to assess the criterion validity of the Sedentary Behavior Questionnaire (SBQ) to measure SB in community-dwelling older adults using thigh-measured accelerometry as the criterion method. 801 participants (75.6 ± 6.1 years old, 57.6% females) provided valid thigh-based accelerometer data (activPAL/Axivity) and completed the SBQ. Criterion validity was assessed using Spearman's Rho coefficients. Bland--Altman plots, including 95% limits of agreement and Intraclass Correlation Coefficient (ICC), were used to assess the agreement between self-report and device-measured daily SB time. Strength of the association was examined using multiple linear regression. There was a weak correlation (Rho = 0.25, p < 0.001) between self-reported and device-based SB measures. The SBQ under-estimated daily SB time compared to accelerometry. Our results highlighted an overall weak-to-moderate correlation between measures, with significant differences between each country's version. Researchers should be cautious when using the SBQ to provide an estimation of SB time in older adults.

Published
2022
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10. Daily steps and all-cause mortality: a meta-analysis of 15 international cohorts

Author

Paluch, Amanda E, Bajpai, Shivangi, Bassett, David R, Carnethon, Mercedes R, Ekelund, Ulf, Evenson, Kelly R, Galuska, Deborah A, Jefferis, Barbara J, Kraus, William E, Lee, I-Min, Matthews, Charles E, Omura, John D, Patel, Alpa V, Pieper, Carl F, Rees-Punia, Erika, Dallmeier, Dhayana, Klenk, Jochen, Whincup, Peter H, Dooley, Erin E, Pettee Gabriel, Kelley, Palta, Priya, Pompeii, Lisa A, Chernofsky, Ariel, Larson, Martin G, Vasan, Ramachandran S, Spartano, Nicole, Ballin, Marcel, Nordström, Peter, Nordström, Anna, Anderssen, Sigmund A, Hansen, Bjørge H, Cochrane, Jennifer A, Dwyer, Terence, Wang, Jing, Ferrucci, Luigi, Liu, Fangyu, Schrack, Jennifer, Urbanek, Jacek, Saint-Maurice, Pedro F, Yamamoto, Naofumi, Yoshitake, Yutaka, Newton, Robert L, Jr, Yang, Shengping, Shiroma, Eric J, and Fulton, Janet E

Published
2022
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16. Real-world mobility recovery after hip fracture: secondary analyses of digital mobility outcomes from four randomized controlled trials.

Author

Engdal, Monika, Taraldsen, Kristin, Jansen, Carl-Philipp, Peter, Raphael Simon, Vereijken, Beatrix, Becker, Clemens, Helbostad, Jorunn Laegdheim, and Klenk, Jochen

Subjects
DIGITAL technology, HIP fractures, RESEARCH funding, SECONDARY analysis, WEARABLE technology, DESCRIPTIVE statistics, LONGITUDINAL method, WALKING, CONVALESCENCE, RESEARCH, BODY movement, PHYSICAL mobility, REGRESSION analysis
Abstract

Background The main focus of rehabilitation following hip fracture is to regain mobility. Objectives To estimate the progression of real-world mobility the first year after hip fracture using digital mobility outcomes. Design An exploratory, prospective cohort study with pooled data from four previously conducted clinical trials. Setting and Subjects We combined data from the Trondheim Hip Fracture Trial and Eva-Hip Trial in Trondheim, Norway, and the PROFinD 1 and PROFinD 2 trials in Stuttgart and Heidelberg, Germany, resulting in a sample of 717 hip fracture patients aged ≥65 years. Methods Each of the trials assessed mobility using body-fixed sensors (activPAL) at three time points, collectively providing observations across the entire first year post-surgery. The following 24-h DMOs were calculated: total walking duration (minutes), maximum number of steps within a walking bout, and number of sit-to-stand-to-walk transfers. Continuous 1-year progression of the median, the 25th percentile, and the 75th percentile were estimated using quantile regression models with splines. Results The dataset contained 5909 observation days. The median daily total walking duration increased until 36 weeks post-surgery reaching 40 min; daily maximum number of steps within a walking bout increased during the first eight weeks and then stabilized at less than 100 steps; daily sit-to-stand-to-walk transfers reached a plateau after 6 weeks with less than 40 transfers. Conclusions The three DMOs progressed differently and attained plateau levels at varying times during the first year after hip fracture, indicating that these Digital Mobility Outcomes provide complementary information about different aspects of mobility recovery. [ABSTRACT FROM AUTHOR]

Published
2024
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17. Effects of controlled supramaximal high-intensity interval training on muscle capacities and physical functions for older adults: analysis of secondary outcomes from the Umeå HIT study—a randomised controlled trial.

Author

Frykholm, Erik, Hedlund, Mattias, Becker, Clemens, Holmberg, Henrik, Johansson, Bengt, Klenk, Jochen, Lindelöf, Nina, Lindemann, Ulrich, Simonsson, Emma, Boraxbekk, Carl-Johan, and Rosendahl, Erik

Subjects
LEG physiology, HAND physiology, SKELETAL muscle physiology, EXERCISE physiology, RESEARCH funding, HIGH-intensity interval training, STATISTICAL sampling, STANDING position, EXERCISE therapy, FUNCTIONAL status, EXERCISE intensity, RANDOMIZED controlled trials, DESCRIPTIVE statistics, CONTROL groups, PRE-tests & post-tests, STRENGTH training, ANAEROBIC exercises, COMPARATIVE studies, CONFIDENCE intervals, BICYCLES, GRIP strength, POSTURAL balance, PATIENT aftercare, SPRINTING, OLD age
Abstract

Objective This study investigated the effectiveness of supramaximal high-intensity interval training (supramaximal HIT) on muscle capacities and physical function compared to moderate-intensity training (MIT) for older adults. Methods Sixty-eight older adults (66–79 years, 56% women), not engaged in regular exercise, were randomised to 3 months of twice-weekly supramaximal HIT (20 minutes including 10 × 6-second intervals) or MIT (40 minutes including 3 × 8-minute intervals). Both groups performed the training on stationary bicycles in a group setting. Target intensity was watt-controlled, with standardised cadence and individualised resistance. Outcomes analysed with linear-mixed models included leg power (Nottingham Power Rig), hand grip strength (Jamar dynamometer), static and dynamic balance (One leg stance, 30-second step test), chair stand (30-second chair stand), and anaerobic cycling performance (modified Borg Cycle Strength Test). Results Baseline values were (supramaximal HIT/MIT, mean ± SD) leg power 198 ± 60/189 ± 53 W, hand grip strength 4.2 ± 1.0/4.3 ± 1.1 N/kg, static balance 64 ± 41/62 ± 41 s, dynamic balance 39 ± 7/38 ± 5 steps, chair stands 22 ± 6/22 ± 6 and anaerobic cycling performance 224 ± 60/217 ± 55 W. At 3-month follow-up, a between-group difference in favour of supramaximal HIT [95% CI] was observed in anaerobic cycling performance of 19[3;35] W. Within-group mean changes for supramaximal HIT/MIT were for leg power 8.4[0.9;15.8]/6.0[−1.3;13.3] W, hand grip strength 0.14[0.00;0.27]/0.13[−0.01;0.26] N/kg, static balance 11[3;20]/10[1;18] s, dynamic balance 1.6[0.3;2.8]/2.3[1.1;3.6] steps, 2.1[1.1;3.1]/1.4[0.4;2.3] chair stands and anaerobic cycling performance 31.3[19.6;43.0]/12.0[0.4;23.5] W. Conclusion Supramaximal HIT showed superior effect on anaerobic cycling performance when compared to MIT. Additionally, the results indicate that supramaximal HIT is comparably beneficial as MIT in terms of effects on muscle capacity and physical function for older adults. [ABSTRACT FROM AUTHOR]

Published
2024
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20. Effects of controlled supramaximal high-intensity interval training on muscle capacities and physical functions for older adults:analysis of secondary outcomes from the Umeå HIT study-a randomised controlled trial

Author

Frykholm, Erik, Hedlund, Mattias, Becker, Clemens, Holmberg, Henrik, Johansson, Bengt, Klenk, Jochen, Lindelöf, Nina, Lindemann, Ulrich, Simonsson, Emma, Boraxbekk, Carl Johan, Rosendahl, Erikx, Frykholm, Erik, Hedlund, Mattias, Becker, Clemens, Holmberg, Henrik, Johansson, Bengt, Klenk, Jochen, Lindelöf, Nina, Lindemann, Ulrich, Simonsson, Emma, Boraxbekk, Carl Johan, and Rosendahl, Erikx

Abstract

Objective This study investigated the effectiveness of supramaximal high-intensity interval training (supramaximal HIT) on muscle capacities and physical function compared to moderate-intensity training (MIT) for older adults. Methods Sixty-eight older adults (66–79 years, 56% women), not engaged in regular exercise, were randomised to 3 months of twice-weekly supramaximal HIT (20 minutes including 10 × 6-second intervals) or MIT (40 minutes including 3 × 8-minute intervals). Both groups performed the training on stationary bicycles in a group setting. Target intensity was watt-controlled, with standardised cadence and individualised resistance. Outcomes analysed with linear-mixed models included leg power (Nottingham Power Rig), hand grip strength (Jamar dynamometer), static and dynamic balance (One leg stance, 30-second step test), chair stand (30-second chair stand), and anaerobic cycling performance (modified Borg Cycle Strength Test). Results Baseline values were (supramaximal HIT/MIT, mean ± SD) leg power 198 ± 60/189 ± 53 W, hand grip strength 4.2 ± 1.0/4.3 ± 1.1 N/kg, static balance 64 ± 41/62 ± 41 s, dynamic balance 39 ± 7/38 ± 5 steps, chair stands 22 ± 6/22 ± 6 and anaerobic cycling performance 224 ± 60/217 ± 55 W. At 3-month follow-up, a between-group difference in favour of supramaximal HIT [95% CI] was observed in anaerobic cycling performance of 19[3;35] W. Within-group mean changes for supramaximal HIT/MIT were for leg power 8.4[0.9;15.8]/6.0[−1.3;13.3] W, hand grip strength 0.14[0.00;0.27]/0.13[−0.01;0.26] N/kg, static balance 11[3;20]/10[1;18] s, dynamic balance 1.6[0.3;2.8]/2.3[1.1;3.6] steps, 2.1[1.1;3.1]/1.4[0.4;2.3] chair stands and anaerobic cycling performance 31.3[19.6;43.0]/12.0[0.4;23.5] W. Conclusion Supramaximal HIT showed superior effect on anaerobic cycling performance when compared to MIT. Additionally, the results indicate that supramaximal HIT is comparably beneficial as MIT in terms of eff, OBJECTIVE: This study investigated the effectiveness of supramaximal high-intensity interval training (supramaximal HIT) on muscle capacities and physical function compared to moderate-intensity training (MIT) for older adults. METHODS: Sixty-eight older adults (66-79 years, 56% women), not engaged in regular exercise, were randomised to 3 months of twice-weekly supramaximal HIT (20 minutes including 10 × 6-second intervals) or MIT (40 minutes including 3 × 8-minute intervals). Both groups performed the training on stationary bicycles in a group setting. Target intensity was watt-controlled, with standardised cadence and individualised resistance. Outcomes analysed with linear-mixed models included leg power (Nottingham Power Rig), hand grip strength (Jamar dynamometer), static and dynamic balance (One leg stance, 30-second step test), chair stand (30-second chair stand), and anaerobic cycling performance (modified Borg Cycle Strength Test). RESULTS: Baseline values were (supramaximal HIT/MIT, mean ± SD) leg power 198 ± 60/189 ± 53 W, hand grip strength 4.2 ± 1.0/4.3 ± 1.1 N/kg, static balance 64 ± 41/62 ± 41 s, dynamic balance 39 ± 7/38 ± 5 steps, chair stands 22 ± 6/22 ± 6 and anaerobic cycling performance 224 ± 60/217 ± 55 W. At 3-month follow-up, a between-group difference in favour of supramaximal HIT [95% CI] was observed in anaerobic cycling performance of 19[3;35] W. Within-group mean changes for supramaximal HIT/MIT were for leg power 8.4[0.9;15.8]/6.0[-1.3;13.3] W, hand grip strength 0.14[0.00;0.27]/0.13[-0.01;0.26] N/kg, static balance 11[3;20]/10[1;18] s, dynamic balance 1.6[0.3;2.8]/2.3[1.1;3.6] steps, 2.1[1.1;3.1]/1.4[0.4;2.3] chair stands and anaerobic cycling performance 31.3[19.6;43.0]/12.0[0.4;23.5] W. CONCLUSION: Supramaximal HIT showed superior effect on anaerobic cycling performance when compared to MIT. Additionally, the results indicate that supramaximal HIT is comparably beneficial as MIT in terms of effects on muscle capacity and physical

Published
2024

33. From high-resolution time series to a single, clinically-interpretable value - considerations for the aggregation of real world walking speed assessed by wearable sensors in patients with chronic obstructive pulmonary disease (COPD)

Author

Koch, Sarah, primary, Buekers, Joren, additional, Cobo, Inés, additional, Lemos, Jorge, additional, Marchena, José, additional, Bonci, Tecla, additional, Caulfield, Brian, additional, Del Din, Silvia, additional, Demeyer, Heleen, additional, Frei, Anja, additional, Hausdorff, Jeff M., additional, Ionescu, Anisoara, additional, Aminian, Kamiar, additional, Klenk, Jochen, additional, Mico Amigo, Enarna, additional, Piraino, Paolo, additional, Singleton, David, additional, Sverdlov, Oleksandr, additional, Rochester, Lynn, additional, Throosters, Thierry, additional, and Garcia-Aymerich, Judith, additional

Published
2023
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36. Applying Social Cognition Models to Explain Walking Duration in Older Adults: The Role of Intrinsic Motivation.

Author

Labudek, Sarah, Fleig, Lena, Jansen, Carl-Philipp, Kramer-Gmeiner, Franziska, Nerz, Corinna, Becker, Clemens, Klenk, Jochen, and Schwenk, Michael

Subjects
STRUCTURAL equation modeling, SOCIAL perception, MOTIVATION (Psychology), SELF-evaluation, ACCELEROMETERS, HEALTH behavior, WALKING, OLD age
Abstract

This study examined the applicability of the health action process approach (HAPA) to walking duration in older adults and the added value of extending the HAPA by intrinsic motivation. Self-reports from older adults (N = 309; Mage = 78.7, 70–95 years) regarding activity-related intrinsic motivation and HAPA variables were collected at the baseline of a fall prevention intervention study. Walking duration at ≥3 metabolic equivalents of task was measured for 7 days via body-worn accelerometers. Two structural equation models with walking duration as a manifest outcome were specified. In both models, the model fit was acceptable, but intention and planning were not associated with walking duration. Intrinsic motivation was significantly related to most HAPA variables and walking duration. Variance explained for walking duration was R2 =.14 in the HAPA and R2 =.17 in the extended model. For explaining older adults' walking duration, intrinsic motivation, but not HAPA-based intention and planning, seemed to be important. [ABSTRACT FROM AUTHOR]

Published
2021
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38. Development of a clinical prediction model for the onset of functional decline in people aged 65–75 years: pooled analysis of four European cohort studies

Author

Jonkman, Nini H., Colpo, Marco, Klenk, Jochen, Todd, Chris, Hoekstra, Trynke, Del Panta, Vieri, Rapp, Kilian, van Schoor, Natasja M., Bandinelli, Stefania, Heymans, Martijn W., Mauger, Dominique, Cattelani, Luca, Denkinger, Michael D., Rothenbacher, Dietrich, Helbostad, Jorunn L., Vereijken, Beatrix, Maier, Andrea B., and Pijnappels, Mirjam

Published
2019
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45. Comparison of falls and cost-effectiveness of the group versus individually delivered Lifestyle-integrated Functional Exercise (LiFE) program: final results from the LiFE-is-LiFE non-inferiority trial

Author

Jansen, Carl-Philipp, primary, Gottschalk, Sophie, additional, Nerz, Corinna, additional, Labudek, Sarah, additional, Kramer-Gmeiner, Franziska, additional, Klenk, Jochen, additional, Clemson, Lindy, additional, Todd, Chris, additional, Dams, Judith, additional, König, Hans-Helmut, additional, Becker, Clemens, additional, and Schwenk, Michael, additional

Published
2023
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