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Janis Fiedler
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Ambulatory assessment for physical activity research: state of the science, best practices and future directions
M Reichert, M Giurgiu, ED Koch, LM Wieland, S Lautenbach, ...
Psychology of sport and exercise 50, 101742, 2020
802020
Key facets to build up eHealth and mHealth interventions to enhance physical activity, sedentary behavior and nutrition in healthy subjects–an umbrella review
J Fiedler, T Eckert, K Wunsch, A Woll
BMC public health 20, 1-21, 2020
542020
The tridirectional relationship among physical activity, stress, and academic performance in university students: a systematic review and meta-analysis
K Wunsch, J Fiedler, P Bachert, A Woll
International journal of environmental research and public health 18 (2), 739, 2021
472021
mHealth interventions to reduce physical inactivity and sedentary behavior in children and adolescents: systematic review and meta-analysis of randomized controlled trials
H Baumann, J Fiedler, K Wunsch, A Woll, B Wollesen
JMIR mHealth and uHealth 10 (5), e35920, 2022
322022
Comparison of self-reported and device-based measured physical activity using measures of stability, reliability, and validity in adults and children
J Fiedler, T Eckert, A Burchartz, A Woll, K Wunsch
Sensors 21 (8), 2672, 2021
292021
Effects of a collective family-based mobile health intervention called “SMARTFAMILY” on promoting physical activity and healthy eating: protocol for a randomized controlled trial
K Wunsch, T Eckert, J Fiedler, L Cleven, C Niermann, H Reiterer, ...
JMIR Research Protocols 9 (11), e20534, 2020
29*2020
Just-in-time adaptive interventions in mobile physical activity interventions—A synthesis of frameworks and future directions
K Wunsch, T Eckert, J Fiedler, A Woll
The European Health Psychologist 22 (4), 834-842, 2022
102022
The effect of self-confidence on performance in sports: A meta-analysis and narrative review
D Jekauc, J Fiedler, K Wunsch, L Mülberger, D Burkart, A Kilgus, J Fritsch
International Review of Sport and Exercise Psychology, 1-27, 2023
72023
Sleep quality, valence, energetic arousal, and calmness as predictors of device-based measured physical activity during a three-week mHealth intervention: An ecological …
J Fiedler, C Seiferth, T Eckert, A Woll, K Wunsch
German Journal of Exercise and Sport Research 52 (2), 237-247, 2022
52022
A just-in-time adaptive intervention to enhance physical activity in the SMARTFAMILY2. 0 trial.
J Fiedler, C Seiferth, T Eckert, A Woll, K Wunsch
Sport, Exercise, and Performance Psychology 12 (1), 43, 2023
32023
Daytime fluctuations of endurance performance in young soccer players: a randomized cross-over trial
J Fiedler, S Altmann, H Chtourou, FA Engel, R Neumann, A Woll
BMC Research Notes 15 (1), 351, 2022
22022
Impact of sodium citrate ingestion during recovery after strenuous exercise in the heat on heart rate variability: A randomized, crossover study
J Fiedler, Z Šmite, S Suvi, S Timpmann, M Mooses, L Medijainen, E Unt, ...
Physiological Reports 10 (9), e15280, 2022
22022
Associations between physical activity, physical fitness, and body composition in adults living in Germany: A cross-sectional study
R Schilling, SCE Schmidt, J Fiedler, A Woll
Plos one 18 (10), e0293555, 2023
12023
The Assessment of 24-Hr Physical Behavior in Children and Adolescents via Wearables: A Systematic Review of Laboratory Validation Studies
M Giurgiu, C Nigg, J Fiedler, I Timm, E Rulf, JBJ Bussmann, CR Nigg, ...
Journal for the Measurement of Physical Behaviour 5 (4), 263-276, 2022
12022
SMARTMOVE—Involving families in the development and implementation of mHealth interventions
T Eckert, K Wunsch, J Fiedler, A Woll
Prävention und Gesundheitsförderung, 1-7, 2021
12021
Associations between green space availability and youth’s physical activity in urban and rural areas across Germany
C Nigg, J Fiedler, A Burchartz, M Reichert, C Niessner, A Woll, ...
Landscape and Urban Planning 247, 105068, 2024
2024
An mHealth Intervention Promoting Physical Activity and Healthy Eating in a Family Setting (SMARTFAMILY): Randomized Controlled Trial
K Wunsch, J Fiedler, S Hubenschmid, H Reiterer, B Renner, A Woll
JMIR mHealth and uHealth 12, e51201, 2024
2024
Impact of a Semi-Rigid Knee Orthotic Intervention on Pain, Physical Activity, and Functional Capacity in Patients with Medial Knee Osteoarthritis
BJ Stetter, J Fiedler, M Arndt, T Stein, S Sell
Journal of Clinical Medicine 13 (6), 1535, 2024
2024
Bi-directional associations of core affect and physical activity in adults with higher body weight: An ecological momentary assessment study
C Seiferth, J Fiedler, T Färber, M Pape, S Schroeder, S Herpertz, ...
Journal of Health Psychology, 13591053241228202, 2024
2024
Examining the relation between emotional experiences and emotional expressions in competitive tennis matches
J Fritsch, J Fiedler, A Hatzigeorgiadis, D Jekauc
Frontiers in Psychology 14, 1287316, 2024
2024
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