Dr. Janis Fiedler
- Akademischer Mitarbeiter
208; Geb. 40.40
+49 721 608 - 46978
Janis Fiedler ∂does-not-exist.kit edu
Engesserstr. 4
76131 Karlsruhe
Fiedler, J.; Šmite, Z.; Suvi, S.; Timpmann, S.; Mooses, M.; Medijainen, L.; Unt, E.; Ööpik, V. (2022). Impact of sodium citrate ingestion during recovery after strenuous exercise in the heat on heart rate variability: A randomized, crossover study. Physiological Reports, 10 (9), Art.-Nr.: e15280. doi:10.14814/phy2.15280
Fiedler, J.; Seiferth, C.; Eckert, T.; Woll, A.; Wunsch, K. (2022). A just-in-time adaptive intervention to enhance physical activity in the SMARTFAMILY2.0 trial. Sport, Exercise, and Performance Psychology, 12 (1), 43–57. doi:10.1037/spy0000311
Fiedler, J.; Seiferth, C.; Eckert, T.; Woll, A.; Wunsch, K. (2022). Sleep quality, valence, energetic arousal, and calmness as predictors of device-based measured physical activity during a three-week mHealth intervention. German Journal of Exercise and Sport Research, 52 (2), 237–247. doi:10.1007/s12662-022-00809-y
Fiedler, J.; Eckert, T.; Burchartz, A.; Woll, A.; Wunsch, K. (2021). Comparison of Self-Reported and Device-Based Measured Physical Activity Using Measures of Stability, Reliability, and Validity in Adults and Children. Sensors, 21 (8), Article no: 2672. doi:10.3390/s21082672
Fiedler, J.; Eckert, T.; Wunsch, K.; Woll, A. (2020). Key facets to build up eHealth and mHealth interventions to enhance physical activity, sedentary behavior and nutrition in healthy subjects – an umbrella review. BMC public health, 20 (1), Art.-Nr.: 1605. doi:10.1186/s12889-020-09700-7
2024
Giurgiu, M.; Haaren-Mack, B. von; Fiedler, J.; Woll, S.; Burchartz, A.; Kolb, S.; Ketelhut, S.; Kubica, C.; Nigg, C. R.; Timm, I.; Thron, M.; Schmidt, S. C. E.; Wunsch, K.; Müller, G.; Nigg, C. R.; Woll, A.; Reichert, M.; Ebner-Priemer, U. W.; Bussmann, J. B. J. (2024). The wearable landscape: Issues pertaining to the validation of the measurement of 24-h physical activity, sedentary, and sleep behavior assessment. Journal of sport and health science, 101006. doi:10.1016/j.jshs.2024.101006
Fiedler, J.; Bergmann, M. R.; Sell, S.; Woll, A.; Stetter, B. J. (2024). Just-in-Time Adaptive Interventions for Behavior Change in Physiological Health Outcomes and the Use Case for Knee Osteoarthritis: Systematic Review. Journal of Medical Internet Research, 26, e54119. doi:10.2196/54119
Seiferth, C.; Fiedler, J.; Färber, T.; Pape, M.; Schroeder, S.; Herpertz, S.; Steins-Loeber, S.; Wolstein, J. (2024). Bi-directional associations of core affect and physical activity in adults with higher body weight: An ecological momentary assessment study. Journal of Health Psychology, 29 (10), 1115–1128. doi:10.1177/13591053241228202
Nigg, C.; Fiedler, J.; Burchartz, A.; Reichert, M.; Niessner, C.; Woll, A.; Schipperijn, J. (2024). Associations between green space availability and youth’s physical activity in urban and rural areas across Germany. Landscape and Urban Planning, 247, Art.-Nr.: 105068. doi:10.1016/j.landurbplan.2024.105068
Klos, L.; Fiedler, J.; Nigg, C.; Niessner, C.; Wäsche, H.; Woll, A. (2024). Walking and non-motorized vehicle use in adolescents: the role of neighborhood environment perceptions across urbanization levels. German journal of exercise and sport research, 54 (1), 145–155. doi:10.1007/s12662-023-00931-5
Schneider, S.; Bloch, H.; Engelhardt, M.; Fiedler, J.; Gaulrapp, H.; Hoppe, M.; Reinsberger, C.; Schäfer, G.; Wulff, J.; Schmitt, H. (2024). Einfluss des Sports auf den kindlichen Organismus. Kindersportmedizin; Expertenmeetingshefte – GOTS. Hrsg.: H. Schmitt, 5–12, Verlags-Comptoir Rolle.
Hoppe, M.; Fiedler, J.; Wulff, J.; Bloch, H.; Ley, D.; Reinsberger, C.; Schmitt, H. (2024). Trainierbarkeit bei Kindern und Adoleszenten. Kindersportmedizin; Expertenmeetingshefte – GOTS. Hrsg.: H. Schmitt, 13–32, Verlags-Comptoir Rolle.
Grim, C.; Engelhardt, M.; Fiedler, J.; Hoppe, M.; Ley, D.; Schäfer, G.; Schmitt, H.; Schneider, S.; Schneider, C.; Wulff, J.; Bloch, H. (2024). Vereinssport im sportpolitischen Spannungsfeld. Kindersportmedizin; Expertenmeetingshefte – GOTS. Hrsg.: H. Schmitt, 41–54, Verlags-Comptoir Rolle.
Fiedler, J.; Engelhardt, M.; Bloch, H.; Gaulrapp, H.; Hoppe, M.; Reinsberger, C.; Schäfer, G.; Schmitt, H.; Schneider, S.; Wulff, J.; Woll, A. (2024). Schulsport. Kindersportmedizin; Expertenmeetingshefte – GOTS. Hrsg.: H. Schmitt, 33–40, Verlags-Comptoir Rolle.
Fiedler, J.; Woll, A.; Wunsch, K. (2024). Comparison of self-reported and device-based measured physical activity—a replication study. German journal of exercise and sport research. doi:10.1007/s12662-024-00979-x
Wunsch, K.; Fiedler, J.; Hubenschmid, S.; Reiterer, H.; Renner, B.; Woll, A. (2024). An mHealth Intervention Promoting Physical Activity and Healthy Eating in a Family Setting (SMARTFAMILY): Randomized Controlled Trial. JMIR mHealth and uHealth, 12, Art.-Nr.: e51201. doi:10.2196/51201
Stetter, B. J.; Fiedler, J.; Arndt, M.; Stein, T.; Sell, S. (2024). Impact of a Semi-Rigid Knee Orthotic Intervention on Pain, Physical Activity, and Functional Capacity in Patients with Medial Knee Osteoarthritis. Journal of Clinical Medicine, 13 (6), Article no: 1535. doi:10.3390/jcm13061535
Fritsch, J.; Fiedler, J.; Hatzigeorgiadis, A.; Jekauc, D. (2024). Examining the relation between emotional experiences and emotional expressions in competitive tennis matches. Frontiers in Psychology, 14, Art.-Nr.: 1287316. doi:10.3389/fpsyg.2023.1287316
2023
Klos, L.; Fiedler, J.; Nigg, C.; Burchartz, A.; Hinz, T.; Wäsche, H. (2023). Physical environment perceptions in rural and urban areas and their influence on adolescents’ walking and non-motorized vehicle use. European journal of public health, 33 (Suppl. 1, Sec. 0.5.1), Article: ckad133.231. doi:10.1093/eurpub/ckad133.231
Fiedler, J.; Wunsch, K.; Bezold, J.; Woll, A. (2023). Digitale Intervention zur Förderung körperlicher Aktivität. Handbuch bewegungsbezogene Gesundheitsförderung. Hrsg. A. Thiel, 456–463, Hofmann-Verlag.
Schilling, R.; Schmidt, S. C. E.; Fiedler, J.; Woll, A. (2023). Associations between physical activity, physical fitness, and body composition in adults living in Germany: A cross-sectional study. PLOS ONE, 18 (10), Artikelnr.: e0293555. doi:10.1371/journal.pone.0293555
Jekauc, D.; Fiedler, J.; Wunsch, K.; Mülberger, L.; Burkart, D.; Kilgus, A.; Fritsch, J. (2023). The effect of self-confidence on performance in sports: a meta-analysis and narrative review. International review of sport and exercise psychology, 1–27. doi:10.1080/1750984X.2023.2222376
2022
Fiedler, J. (2022, November 7). Mobile Health interventions to enhance physical activity. Overview, methodological considerations, and just-in-time adaptive interventions. PhD dissertation. Karlsruher Institut für Technologie (KIT). doi:10.5445/IR/1000152016
Fiedler, J.; Šmite, Z.; Suvi, S.; Timpmann, S.; Mooses, M.; Medijainen, L.; Unt, E.; Ööpik, V. (2022). Impact of sodium citrate ingestion during recovery after strenuous exercise in the heat on heart rate variability: A randomized, crossover study. Physiological Reports, 10 (9), Art.-Nr.: e15280. doi:10.14814/phy2.15280
Giurgiu, M.; Nigg, C.; Fiedler, J.; Timm, I.; Rulf, E.; Bussmann, J. B. J.; Nigg, C. R.; Ebner-Priemer, U. W.; Woll, A. (2022). The Assessment of 24-Hr Physical Behavior in Children and Adolescents via Wearables: A Systematic Review of Laboratory Validation Studies. Journal for the Measurement of Physical Behaviour, 5 (4), 263–276. doi:10.1123/jmpb.2022-0014
Fiedler, J.; Altmann, S.; Chtourou, H.; Engel, F. A.; Neumann, R.; Woll, A. (2022). Daytime fluctuations of endurance performance in young soccer players: a randomized cross-over trial. BMC Research Notes, 15 (1), Article no: 351. doi:10.1186/s13104-022-06247-1
Fiedler, J.; Seiferth, C.; Eckert, T.; Woll, A.; Wunsch, K. (2022). A just-in-time adaptive intervention to enhance physical activity in the SMARTFAMILY2.0 trial. Sport, Exercise, and Performance Psychology, 12 (1), 43–57. doi:10.1037/spy0000311
Kaczmarczyk, A.; Fiedler, J.; Woll, A.; Wunsch, K. (2022). User’s appraisal of the SMARTFAMILY2.0 Application: a qualitative investigation. Jahrestagung dvs-Kommission Gesundheit 14. – 16. September 2022 am Institut für Sportwissenschaft in Tübingen : Abstractband. Hrsg.: K. Dierkes, 98, Universität Tübingen.
Fiedler, J.; Seiferth, C.; Eckert, T.; Woll, A.; Wunsch, K. (2022). A just-in-time adaptive intervention to break physically inactive phases in the SMARTFAMILY2.0 trial. Jahrestagung dvs-Kommission Gesundheit 14. – 16. September 2022 am Institut für Sportwissenschaft in Tübingen : Abstractband. Hrsg.: K. Dierkes, Universität Tübingen.
Fiedler, J.; Wunsch, K.; Eckert, T.; Woll, A. (2022). Participants‘ interactions with different ambulatory assessment tools during the three-week intervention of the SMARTFAMILY trial. 25. Sportwissenschaftlicher Hochschultag der Deutschen Vereinigung für Sportwissenschaft (dvs 2022), Online, March 29–31, 2022.
Fiedler, J.; Seiferth, C.; Eckert, T.; Woll, A.; Wunsch, K. (2022). Affective states as predictors of device-based measured physical activity during a three-week mHealth intervention. An ecological momentary assessment study within the SMARTFAMILY trial. Sport, Mehr und Meer – Sportwissenschaften in gesellschaftlicher Verantwortung. Hrsg.: Manfred Wegner, Jonas Jürgensen, 93, Feldhaus Verlag.
Baumann, H.; Fiedler, J.; Wunsch, K.; Woll, A.; Wollesen, B. (2022). mHealth Interventions to Reduce Physical Inactivity and Sedentary Behavior in Children and Adolescents: Systematic Review and Meta-analysis of Randomized Controlled Trials. JMIR mHealth and uHealth, 10 (5), Art.Nr. e35920. doi:10.2196/35920
Fiedler, J.; Seiferth, C.; Eckert, T.; Woll, A.; Wunsch, K. (2022). Sleep quality, valence, energetic arousal, and calmness as predictors of device-based measured physical activity during a three-week mHealth intervention. German Journal of Exercise and Sport Research, 52 (2), 237–247. doi:10.1007/s12662-022-00809-y
Wunsch, K.; Fiedler, J.; Eckert, T.; Woll, A. (2022). Just-in-time adaptive interventions in mobile physical activity interventions – A synthesis of frameworks and future directions. European Health Psychologist, 22 (4), 836–844.
Eckert, T.; Wunsch, K.; Fiedler, J.; Woll, A. (2022). SMARTMOVE—Involving families in the development and implementation of mHealth interventions [SMARTMOVE – Einbezug von Familien in die Entwicklung und Implementierung digitaler Gesundheitsangebote]. Pravention und Gesundheitsforderung, 17, 313–319. doi:10.1007/s11553-021-00873-6
2021
Wunsch, K.; Fiedler, J.; Eckert, T.; Woll, A. (2021). The degree of self-imposed goal achievement and levels of attainment within family members in the SMARTFAMILY trial. 53. ASP Jahrestagung - Talententwicklung & Coaching im Sport (2021), Online, May 13–15, 2021.
Fiedler, J.; Eckert, T.; Wunsch, K.; Woll, A. (2021). Participants’ interactions with different mHealth features during the three week intervention of the SMARTFAMILY study. 53. ASP Jahrestagung - Talententwicklung & Coaching im Sport (2021), Online, May 13–15, 2021.
Fiedler, J.; Eckert, T.; Wunsch, K.; Woll, A. (2021). Epoch length influences attainment of PA guidelines in children and adults – Results of the Smartfamily study. Sports, Medicine and Health Summit (2021), Online, April 20–24, 2021.
Fiedler, J.; Eckert, T.; Burchartz, A.; Woll, A.; Wunsch, K. (2021). Comparison of Self-Reported and Device-Based Measured Physical Activity Using Measures of Stability, Reliability, and Validity in Adults and Children. Sensors, 21 (8), Article no: 2672. doi:10.3390/s21082672
Wunsch, K.; Fiedler, J.; Bachert, P.; Woll, A. (2021). The Tridirectional Relationship among Physical Activity, Stress, and Academic Performance in University Students: A Systematic Review and Meta-Analysis. International journal of environmental research and public health, 18 (2), Art. Nr.: 739. doi:10.3390/ijerph18020739
2020
Reichert, M.; Giurgiu, M.; Koch, E. D.; Wieland, L. M.; Lautenbach, S.; Neubauer, A. B.; Haaren-Mack, B. von; Schilling, R.; Timm, I.; Notthoff, N.; Marzi, I.; Hill, H.; Brüßler, S.; Eckert, T.; Fiedler, J.; Burchartz, A.; Anedda, B.; Wunsch, K.; Gerber, M.; Jekauc, D.; Woll, A.; Dunton, G. F.; Kanning, M.; Nigg, C. R.; Ebner-Priemer, U.; Liao, Y. (2020). Ambulatory assessment for physical activity research: State of the science, best practices and future directions. Psychology of sport and exercise, 50, Article no: 101742. doi:10.1016/j.psychsport.2020.101742
Fiedler, J.; Eckert, T.; Wunsch, K.; Woll, A. (2020). Erreichung von gemeinsam ad libitum gesetzten Bewegungs- und Ernährungszielen in der SMARTFAMILY Studie. Sports, Movement & Health. Hrsg.: M. Sprenger, 108–111, Technische Universität Kaiserslautern (TU ).
Fiedler, J.; Wunsch, K.; Eckert, T.; Woll, A. (2020). Adhärenz zu gemeinsam ad libitum gesetzten Bewegungs-und Ernährungszielen in der SMARTFAMILY Studie. Sport – Gesundheit – Digital (2020), Kaiserslautern, Germany, November 26–27, 2020. doi:10.13140/RG.2.2.35572.78720
Wunsch, K.; Eckert, T.; Fiedler, J.; Cleven, L.; Niermann, C.; Reiterer, H.; Renner, B.; Woll, A. (2020). Effects of a Collective Family-Based Mobile Health Intervention Called “SMARTFAMILY” on Promoting Physical Activity and Healthy Eating: Protocol for a Randomized Controlled Trial. JMIR Research Protocols, 9 (11), e20534. doi:10.2196/20534
Fiedler, J.; Eckert, T.; Wunsch, K.; Woll, A. (2020). Key facets to build up eHealth and mHealth interventions to enhance physical activity, sedentary behavior and nutrition in healthy subjects – an umbrella review. BMC public health, 20 (1), Art.-Nr.: 1605. doi:10.1186/s12889-020-09700-7
2019
Fuchs, S.; Fiedler, J.; Eckert, T. (2019). Eine App hilft bei den guten Vorsätzen fürs neue Jahr - KIT Sportwissenschaftler machen Familien zum Fitnessteam - Campusreport am 31.12.2019. doi:10.5445/DIVA/2019-985
Forschungsbereich
- Objektive Erfassung von Aktivitätsverhalten mittels Akzelerometrie
- Änderung von Aktivitätsverhalten im Setting Familie auf Basis von mHealth Technologien
- Akzelerometer Datenauswertung in SMARTFAMILY
- Datenmanagement in der SMARTFAMILY
- Leistungsdiagnostik
Vita
| Seit 2019 | Akademischer Mitarbeiter am Karlsruher Institut für Technologie, Institut für Sport und Sportwissenschaft |
| 2018 | Auslandspraktikum, „Laboratory methods and data collection in exercise physiology research“, an der Universität Tartu |
| 2016 - 2018 | Masterstudium, Gesundheitsförderung und Therapie durch Sport an der JGU Mainz |
| 2016 - 2018 | Fortbildung Sporttherapie (DVGS), Bereiche Onkologie, Kardiologie/Orthopädie und Psychosoziales Modul, Entspannung und Psychosomatische Medizin |
| 2012 - 2016 | Bachelorstudium, Sportwissenschaft an der JGU Mainz |