Publications
Below is a list of scientific publications that feature the VentriJect VO₂max estimation algorithm, the VentriJect Seismofit® Sensor, or support the importance of estimating VO₂max. These publications highlight the innovative technology and research behind our solutions, demonstrating their accuracy and relevance in the field of cardiovascular fitness.
Please note that while some of these publications are free, others may require a fee for access.
Validation Studies
Validation studies are essential research efforts that confirm the reliability, accuracy, and validity of a product or technology. These studies are conducted to ensure that the Seismofit® sensor and VO₂max estimation algorithm perform consistently and accurately under various conditions and in diverse populations.
Below is a list of validation study publications that provide robust evidence supporting the Seismofit® product’s effectiveness. These studies underline its reliability, accuracy, and validity in delivering precise VO₂max assessments.
- Cardiovascular Digital Health Journal 2023, 4(5), 155–163.
Validity and reliability of seismocardiography for the estimation of cardiorespiratory fitness
Mikkel Mikkel T. Hansen, Tue Rømer, Amalie Højgaard, Karina Husted, Kasper Sørensen, Samuel E. Schmidt, Flemming Dela, Jørn W. Helge
- International Journal of Sports Med 2023, 44(09), 650-656
Accuracy of a Clinical Applicable Method for Prediction of VO2max Using Seismocardiography
Hansen, M. T., Husted, K. L. S., Fogelstrøm, M., Rømer, T., Schmidt, S. E., Sørensen, K., & Helge, J.
- Cardiovascular Digital Health Journal – HRX San Diego 2022, 3(4), 204-210
A Chest-Mounted Accelerometer for Estimation of Cardiorespiratory Fitness
Samuel Emil Schmidt, Mikkel Thunestvedt Hansen, Kasper Sørensen, Tue Rømer, Lasse Gliemann, Dan Stieper Karbing, Mathias Krogh Poulsen, Jørn W. Helge, Peter Søgaard
- European Heart Journal, Volume 43, Issue Supplement_2, October 2022
Estimation of Cardiorespiratory fitness using a using a chest mounted accelerometer
Samuel Emil Schmidt, Mikkel Thunestvedt Hansen, Tue Rømer, Peter Søgaard, Jørn W. Helge
- 2021 Computing in Cardiology (CinC)
Determination of Maximal Oxygen Uptake Using Seismocardiography at Rest
Mikkel Hansen, Birk Mygind, Tue Rømer, Kasper Sørensen, Samuel Emil Schmidt, Jørn W. Helge, Mathilde Fogelstrøm
- European Heart Journal, Volume 42, Issue Supplement_1, October 2021
Validity and reliability of a clinical non-exercise method for assessment of cardiorespiratory fitness using seismocardiography
- International Journal of Sports Medicine, 2020, 41(10) 661-668
A Clinical Method for Estimation of VO2max Using Seismocardiography
Kasper Sørensen, Mathias Krogh Poulsen, Dan Stieper Karbing, Peter Søgaard, Johannes Jan Struijk, Samuel Emil Schmidt
- Healthcare. 2024; 12(21):2162
Evaluating Seismocardiography as a Non-Exercise Method for Estimating Maximal Oxygen Uptake
Schulenburg R, Schmidt SE, Schröder J, Harth V, Reer R
Background Publications
These background publications provide the foundational research and theoretical frameworks that highlight the importance of VO₂max and CRF. They explore how these metrics are critical for evaluating physical fitness and guiding health interventions. This body of knowledge has been instrumental in the development and application of the Seismofit® product, ensuring that our technology is grounded in the latest scientific insights.
- Journal of the American College of Cardiology, 2023
Changes in Cardiorespiratory Fitness and Survival in Patients With or Without Cardiovascular Disease
Peter Kokkinos, Charles Faselis, Immanuel Babu Henry Samuel, Carl J. Lavie, Jiajia Zhang, Jose D. Vargas, Andreas Pittaras, Michael Doumas, Pamela Karasik, Hans Moore, Michael Heimal, and Jonathan Myers
- Circulation, 2016
Importance of Assessing Cardiorespiratory Fitness in Clinical Practice: A Case for Fitness as a Clinical Vital Sign: A Scientific Statement From the American Heart Association
Robert Ross, Steven N. Blair, Ross Arena, Timothy S. Church, Jean-Pierre Després, Barry A. Franklin, William L. Haskell, Leonard A. Kaminsky, Benjamin D. Levine, Carl J. Lavie, Jonathan Myers, Josef Niebauer, Robert Sallis, Susumu S. Sawada, Xuemei Sui and Ulrik Wisløff
- Journal of the American College of Cardiology, 2023
Adaptation to a standardized training program and changes in fitness in a large, heterogeneous population: the HERITAGE Family Study
Skinner JS, Wilmore KM, Krasnoff JB, Jaskólski A, Jaskólska A, Gagnon J, Province MA, Leon AS, Rao DC, Wilmore JH, Bouchard C
- Medicine & Science in Sports & Exercise 32(1):p 157, January 2000
Leonard A. Kaminsky, Mary T. Imboden, and Cemal Ozemek
- JAMA, 2009;301(19):2024-2035
Cardiorespiratory fitness as a quantitative predictor of all-cause mortality and cardiovascular events in healthy men and women: a meta-analysis
Satoru Kodama 1, Kazumi Saito, Shiro Tanaka, Miho Maki, Yoko Yachi, Mihoko Asumi, Ayumi Sugawara, Kumiko Totsuka, Hitoshi Shimano, Yasuo Ohashi, Nobuhiro Yamada, Hirohito Son
- British Journal of Sports Medicine, 2014, Volume 48
High-intensity interval training in patients with lifestyle-induced cardiometabolic disease: a systematic review and meta-analysis
Skinner JS, Wilmore KM, Krasnoff JB, Jaskólski A, Jaskólska A, Gagnon J, Province MA, Leon AS, Rao DC, Wilmore JH, Bouchard C
- JAMA Netw Open. 2018
Association of Cardiorespiratory Fitness With Long-term Mortality Among Adults Undergoing Exercise Treadmill Testing
Mandsager K, Harb S, Cremer P, Phelan D, Nissen SE, Jaber W.
- BMJ Open, Volume 8, 2018
Reference values for peak oxygen uptake: cross-sectional analysis of cycle ergometry-based cardiopulmonary exercise tests of 10 090 adult German volunteers from the Prevention First Registry
Daniel Rapp, Jürgen Scharhag, Stefan Wagenpfeil, Johannes Scholl