Martin Jacobsson
@jacobsson.nl
130 followers 350 following 49 posts
Academic researcher in Internet of Things, wearables, sensors, and machine learning for medical, care, well-being, and sports applications. Work at KTH Royal Institute of Technology https://www.jacobsson.nl/research/
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jacobsson.nl
Did you also check how quick HR measurements respond to changes in HR or just steady state measurements?
jmirpub.bsky.social
New in JMIR Cardio: Validity of #heart Rate Measurement Using Wearable Devices During #cardiopulmonary Exercise Testing in Patients With #cardiovascular Disease: Prospective Pilot Validation Study
Validity of #heart Rate Measurement Using Wearable Devices During #cardiopulmonary Exercise Testing in Patients With #cardiovascular Disease: Prospective Pilot Validation Study
Background: Wearable devices offer a promising solution for remotely monitoring #heart rate (HR) during home-based cardiac rehabilitation. However, evidence regarding their accuracy across varying exercise intensities and patient profiles remains limited, particularly in populations with #cardiovascular disease (CVD), such as those with #heart failure (HF). Objective: The objective of our study was to evaluate the accuracy of HR measurements obtained using the Fitbit Inspire 3 during #cardiopulmonary exercise testing (CPX) in patients with CVD, including those with HF. Methods: In this single-center, prospective pilot study, 30 patients with CVD undergoing CPX were enrolled. HR was simultaneously recorded using electro#cardiography (ECG) and the Fitbit Inspire 3 at 1-min intervals across various CPX phases: rest, exercise below and above the anaerobic threshold (AT), and recovery. The correlation between the two methods was assessed using Pearson’s correlation coefficient. Measurement error was quantified by mean absolute error and mean absolute percentage error (MAPE), with a MAPE ≤10% defined as the threshold for acceptable agreement. Results: All data points were 630 points per min. The Fitbit Inspire 3 demonstrated a strong overall correlation with ECG-derived HR (r = 0.90; interquartile range: 0.88–0.91) and an acceptable MAPE of 5.40±8.33%. The total error was 94/630 (15%), with overestimation and underestimation of 37/630points (6%) and 57/630points (9%), respectively. The rate of HR underestimation reached 19/119points (16%) during exercise above AT, compared to 1/30point (3%) at rest. When stratified by HF stage (B vs. C), underestimation was more pronounced in patients with HF (14/275points; 5% vs.40/355points; 11%). Conclusions: The Fitbit Inspire 3 provides acceptable validity for HR monitoring during CPX in patients with CVD. However, clinicians should interpret HR data with caution during high-intensity exercise, especially in patients with HF.
dlvr.it
jacobsson.nl
Student thesis that I supervised is published: Automated Dietary Analysis Using Computer Vision and Large Language Models: An iOS Prototype urn.kb.se/resolve?urn=...
Reposted by Martin Jacobsson
spectrum.ieee.org
Security researchers located 37 separate “easy to exploit” vulnerabilities in #NASA’s core Flight System, which would have enabled them to hack into satellites. It’s time for the #space industry to up its #cybersecurity game.
spectrum.ieee.org/satellite-ha...
Reposted by Martin Jacobsson
jmirpub.bsky.social
New JMIR MedInform: An artificial intelligence (#AI)–Based Framework for Predicting Emergency Department Overcrowding: Development and Evaluation Study
An artificial intelligence (#AI)–Based Framework for Predicting Emergency Department Overcrowding: Development and Evaluation Study
Background: Emergency department (ED) overcrowding remains a critical challenge, leading to delays in #patient care and increased operational strain. Current hospital management strategies often rely on reactive decision-making, addressing congestion only after it occurs. However, effective #patient flow management requires early identification of overcrowding risks to allow timely interventions. Machine learning (ML)–based predictive modeling offers a solution by forecasting key #patient flow measures, such as waiting count, enabling proactive resource allocation and improved hospital efficiency. Objective: The aim of this study is to develop ML models that predict ED waiting room occupancy (waiting count) at 2 temporal resolutions. The first approach is the hourly prediction model, which estimates the waiting count exactly 6 hours ahead at each prediction time (eg, a 1 PM prediction forecasts 7 PM). The second approach is the daily prediction model, which forecasts the average waiting count for the next 24-hour period (eg, a 5 PM prediction estimates the following day’s average). These predictive tools support resource allocation and help mitigate overcrowding by enabling proactive interventions before congestion occurs. Methods: Data from a partner hospital’s ED in the southeastern United States were used, integrating internal and external sources. Eleven different ML algorithms, ranging from traditional approaches to deep learning architectures, were systematically trained and evaluated on both hourly and daily predictions to determine the models that achieved the lowest prediction error. Experiments optimized feature combinations, and the best models were tested under high #patient volume and across different hours to assess temporal accuracy. Results: The best hourly prediction performance was achieved by time series vision transformer plus (TSiTPlus) with a mean absolute error (MAE) of 4.19 and a mean squared error (MSE) of 29.36. The overall hourly waiting count had a mean of 18.11 and a SD (σ) of 9.77. Prediction accuracy varied by time of day, with the lowest MAE at 11 PM (2.45) and the highest at 8 PM (5.45). Extreme case analysis at (mean + 1σ), (mean + 2σ), and (mean + 3σ) resulted in MAEs of 6.16, 10.16, and 15.59, respectively. For daily predictions, an explainable convolutional neural network plus (XCMPlus) achieved the best results with an MAE of 2.00 and a MSE of 6.64. The daily waiting count had a mean of 18.11 and a SD of 4.51. Both models outperformed traditional forecasting approaches across multiple evaluation metrics. Conclusions: The proposed prediction models effectively forecast ED waiting count at both hourly and daily intervals. The results demonstrate the value of integrating diverse data sources and applying advanced modeling techniques to support proactive resource allocation decisions. The implementation of these forecasting tools within hospital management systems has the potential to improve #patient flow and reduce overcrowding in emergency care settings. The code is available in our GitHub repository. Trial Registration:
dlvr.it
Reposted by Martin Jacobsson
economist.com
Are you an good writer with a passion for explaining the world around you?

We are looking for a science and technology correspondent based in our London office. Experience in journalism is not required. Apply here by September 28th:
The Economist is hiring a science and technology correspondent
We’re looking for a writer to join us in London for 12 months
econ.st
Reposted by Martin Jacobsson
who.int
WHO @who.int · 22d
⚠️Cardiovascular diseases.
⚠️Cancer.
⚠️Chronic respiratory diseases.
⚠️Diabetes.

They are silent and deadly.

Every year these diseases claim millions of lives.

Bold policies & healthier environments can stop these #SilentKillers in their tracks.

Change is within our reach 👉 bit.ly/UNGAHLM4 #UNGA
jacobsson.nl
Karolinska University Hospital on place 11 on Newsweek's list over smartest hospital. AI being one major category. Great to hear that when I collaborate with Karolinska on several AI projects.
rankings.newsweek.com/worlds-best-...
World’s Best Smart Hospitals 2026
Smart hospitals utilize advanced technology including AI and automation to improve patient care and streamline workflow.
rankings.newsweek.com
jacobsson.nl
KTH Center for Sports Engineering invites to online seminars on the latest research and developments in engineering in sports.

The topic for the first seminar will be AI in Sports (to be held tomorrow Thursday at 17:00 CEST over Zoom). See this link:
www.kth.se/sports-engin... #sporttech #ML #AI 🧪
Webseminar Applied Sports Engineering #1 | KTH
www.kth.se
jacobsson.nl
”The success of [remote patient monitoring] depends less on the technology itself and more on program design, including targeting high-risk patients and having a responsive clinical team.”
Reposted by Martin Jacobsson
anesthesiology.bsky.social
The StatistiCal analysis and repOrting of cardiac output Method comPARison studiEs (COMPARE) statement provides a framework for designing, performing, and reporting cardiac output method comparison studies. Read the special article by Saugel et al.: ow.ly/pL8v50WEKnm
Reposted by Martin Jacobsson
jmirpub.bsky.social
JMIR Formative Res: Evaluating a Customized Version of ChatGPT for Systematic Review Data Extraction in Health Research: Development and #usability Study #ChatGPT #HealthResearch #SystematicReview #AI #DataExtraction
Evaluating a Customized Version of ChatGPT for Systematic Review Data Extraction in Health Research: Development and #usability Study
Background: Systematic reviews are essential for synthesising research in health sciences, yet they are resource-intensive and prone to human error. The data extraction phase, where key details of studies are identified and recorded in a systematic manner, may benefit from the application of automation processes. Recent advancements in artificial intelligence (#AI) (AI), specifically Large Language Models (LLMs) like ChatGPT, may streamline this process. Objective: This study aims to develop and evaluate a custom Generative Pre-Training Transformer (GPT), named Systematic Review Extractor Pro, for automating the data extraction phase of systematic reviews in health research Methods: OpenAI's GPT Builder was used to create a GPT tailored to extract information from academic manuscripts. The Role, Instruction, Steps, End goal, and Narrowing (RISEN) framework was used to inform prompt engineering for the GPT. A sample of 20 studies across two distinct systematic reviews was used to evaluate the GPT's performance in extraction. Agreement rates between the GPT outputs and human reviewers were calculated for each study subsection. Results: Mean time for human extraction was 36 minutes per study, compared to 26.6 seconds for the GPT plus 13 minutes of human review. The GPT demonstrated high overall agreement rates with human reviewers, achieving 91.45% for review 1 and 89.31% for review 2. It was particularly accurate in extracting study (review 1: 95.25; review 2: 90.83%) and participant (review 1: 95.03%; review 2: 90.00%) characteristics, with lower performance observed in more complex areas such as methodological characteristics (87.07%) and statistical results (77.50%). The GPT correct when the human reviewer was incorrect in 14 instances (3.25%) in review 1 and four instances (1.16% in review 2). Conclusions: The custom GPT significantly reduced extraction time and shows evidence that it can extract data with high accuracy, particularly participant and study characteristics. It was most effective in extracting information such as study and participant characteristics. This tool may offer a viable option for researchers seeking to reduce resource demands during the extraction phase, though more research is needed to evaluate test-retest reliability, performance across broader review types, and accuracy extracting statistical data. The tool in the current study has been made open access.
dlvr.it
Reposted by Martin Jacobsson
spectrum.ieee.org
Over a billion minutes of #brain #data from #Muse’s brain-sensing headbands have led to an AI model of the brain on their new Muse S Athena. Muse’s new headband is a cost-effective brain monitor. “We’re focused on bringing neurotechnology to the home.”
spectrum.ieee.org/muse-headband
Can Muse's Latest Brain-Sensing Headband Transform Sleep Monitoring?
Muse S Athena headband combines EEG and fNIRS for brain monitoring at home. Dive into the world of portable neurotech and its potential for sleep science.
spectrum.ieee.org
Reposted by Martin Jacobsson
jmirpub.bsky.social
Effects of an Exercise Intervention Based on mHealth Technology on the Physical Health of Male University Students With Overweight and Obesity: Randomized Controlled Trial
Effects of an Exercise Intervention Based on mHealth Technology on the Physical Health of Male University Students With Overweight and Obesity: Randomized Controlled Trial
Background: Obesity has become one of today's global health challenges. According to the World Health Organisation, in 2022, 2.5 billion adults aged 18 years and older will be overweight, including more than 890 million adults with obesity. Objective: Exercise interventions based on mobile health technology are widely available, but the effectiveness and feasibility of interventions using mobile health apps and exercise watches to improve the physical health of overweight and obese male college students are unknown, and this study compares the effects of online interventions carried out by mobile health technology and offline interventions guided by physical trainers on the physical health of overweight and obese male college students. Methods: This study used a randomised controlled trial with a pre-test post-test design, and participants were randomly divided into an online group, an offline group and a control group. The online group exercised online through the fitness APP, and the offline group was instructed by a professional trainer to exercise offline, and both groups wore sports watches to monitor their activities, and the training content was the same. The control group did not carry out any intervention. Results: At the end of the intervention, the BMI of the online and offline groups decreased by 1.5 kg/m² and 1.6 kg/m², respectively (P
dlvr.it
Reposted by Martin Jacobsson
zackwhittaker.com
Episource is one of those giant medical billing and adjustment companies (owned by UnitedHealth's Optum, no less) that you've probably never heard of, but was hit by ransomware.

It's one of the biggest breaches of the year so far, affecting millions. If you got a data breach notice, this is why.
Episource is notifying millions of people that their health data was stolen | TechCrunch
The UnitedHealth-owned medical coding service was hacked earlier this year by a ransomware gang.
techcrunch.com
Reposted by Martin Jacobsson
jmirpub.bsky.social
Implementing Large Language Models in Health Care: Clinician-Focused Review With Interactive Guideline
Implementing Large Language Models in Health Care: Clinician-Focused Review With Interactive Guideline
Background: Large language models (LLMs) can generate outputs understandable by humans, such as answers to medical questions and radiology reports. With the rapid development of LLMs, clinicians face a growing challenge in determining the most suitable algorithms to support their work. Objective: We aimed to provide clinicians and other health care practitioners with systematic guidance in selecting an LLM that is relevant and appropriate to their needs and facilitate the integration process of LLMs in health care. Methods: We conducted a literature search of full-text publications in English on clinical applications of LLMs published between January 1, 2022, and March 31, 2025, on PubMed, ScienceDirect, Scopus, and IEEE Xplore. We excluded papers from journals below a set citation threshold, as well as papers that did not focus on LLMs, were not research based, or did not involve clinical applications. We also conducted a literature search on arXiv within the same investigated period and included papers on the clinical applications of innovative multimodal LLMs. This led to a total of 270 studies. Results: We collected 330 LLMs and recorded their application frequency in clinical tasks and frequency of best performance in their context. On the basis of a 5-stage clinical workflow, we found that stages 2, 3, and 4 are key stages in the clinical workflow, involving numerous clinical subtasks and LLMs. However, the diversity of LLMs that may perform optimally in each context remains limited. GPT-3.5 and GPT-4 were the most versatile models in the 5-stage clinical workflow, applied to 52% (29/56) and 71% (40/56) of the clinical subtasks, respectively, and they performed best in 29% (16/56) and 54% (30/56) of the clinical subtasks, respectively. General-purpose LLMs may not perform well in specialized areas as they often require lightweight prompt engineering methods or fine-tuning techniques based on specific datasets to improve model performance. Most LLMs with multimodal abilities are closed-source models and, therefore, lack of transparency, model customization, and fine-tuning for specific clinical tasks and may also pose challenges regarding data protection and privacy, which are common requirements in clinical settings. Conclusions: In this review, we found that LLMs may help clinicians in a variety of clinical tasks. However, we did not find evidence of generalist clinical LLMs successfully applicable to a wide range of clinical tasks. Therefore, their clinical deployment remains challenging. On the basis of this review, we propose an interactive online guideline for clinicians to select suitable LLMs by clinical task. With a clinical perspective and free of unnecessary technical jargon, this guideline may be used as a reference to successfully apply LLMs in clinical settings.
dlvr.it
jacobsson.nl
The main take away from this paper is that all heart rate monitors used in sports have a builtin delay due to filtering. If you do high intensive interval training (HIIT) or similar exercise styles, HR readings are not correct.
jacobsson.nl
Paper published: Predicting Opportunities for Improvement in Trauma Care using Machine Learning: A retrospective registry-based study at a major trauma centre #MedSky bmjopen.bmj.com/content/15/6...
bmjopen.bmj.com
Reposted by Martin Jacobsson
acm.org
The May/June 2025 issue of ACM Queue dives into WebAssembly: from DOM support to end-user programmable AI, there’s something for everyone! Grab an e-copy here:
WebAssembly - ACM Queue
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