{"ok":true,"api":{"name":"SAIMSARA Evidence Object Discovery API","version":"v1"},"mode":"doc_key","editorial_verification":{"status":"human_reviewed","trust_label":"machine_generated_human_reviewed","method":"World ID proof-of-human editorial account","scope":["clinical_integrity","reference_quality","scientific_coherence"],"verification_note":"This Evidence Object is machine-generated and human-reviewed. World ID is used to verify that editorial oversight was submitted by a unique human account.","does_not_mean":"World ID verifies proof-of-human editorial oversight; it does not independently certify the scientific truth of every claim."},"object":{"object_type":"saimsara_evidence_object_metadata","doc_key":"digital::FITNESS_TRACKERS_PM","issue_slug":"digital","doc_id":"FITNESS_TRACKERS_PM","title":"Fitness Trackers and Health Outcomes","doi":"10.62487/saimsaraded773a0","doi_url":"https://doi.org/10.62487/saimsaraded773a0","version":"2026-04-17","source_name":"PubMed","article_url":"https://saimsara.com/sessions/fitness-tracker-20260417-212745-ded773a0/","image_url":"","topic_tags":"Wearable activity trackers,Physical activity monitoring,Step count accuracy,Patient compliance,Chronic disease management,Sleep tracking,Cardiorespiratory fitness,Mobile health technology,Behavioral intervention,Construct validity","keywords":["Wearable activity trackers","Physical activity monitoring","Step count accuracy","Patient compliance","Chronic disease management","Sleep tracking","Cardiorespiratory fitness","Mobile health technology","Behavioral intervention","Construct validity"],"metrics":{"included_all":275,"included_original":241,"reference_index":146,"total_participants":645809},"discover_url":"https://saimsara.com/api/v1/discover.php?doc_key=digital%3A%3AFITNESS_TRACKERS_PM","paid_evidence_url":"https://saimsara.com/api/v1/evidence.php?doc_key=digital%3A%3AFITNESS_TRACKERS_PM","price":{"amount":"7.00","currency":"USD","units":7,"unit_amount":"1.00"},"payment_methods":["api_key","stripe_checkout","object_grant","x402"],"text_length":14521,"preview":"Results Key finding aligned to the query: Consumer-grade fitness trackers demonstrate high construct validity for monitoring HR and step counts across various clinical populations, including those with multiple sclerosis (MS), cancer, and post-operative status. However, their efficacy in driving sustained behavioral change is inconsistent, with significant discontinuation rates observed in adolescents and no significant impact on postoperative morbidity in some randomized controlled trials (RCTs). Furthermore, while sensitive for sleep detection, these devices often exhibit low specificity for wake periods and can overestimate total sleep time (TST) in patients with sleep disorders. Original…","trust_label":"machine_generated_human_reviewed","editorial_verification":{"status":"human_reviewed","trust_label":"machine_generated_human_reviewed","method":"World ID proof-of-human editorial account","scope":["clinical_integrity","reference_quality","scientific_coherence"],"verification_note":"This Evidence Object is machine-generated and human-reviewed. World ID is used to verify that editorial oversight was submitted by a unique human account.","does_not_mean":"World ID verifies proof-of-human editorial oversight; it does not independently certify the scientific truth of every claim."},"checkout":{"method":"POST","url":"https://saimsara.com/create_checkout_session.php","content_type":"application/x-www-form-urlencoded","params":{"plan":"evidence_object","doc_key":"digital::FITNESS_TRACKERS_PM"},"optional_params":{"customer_email":"user@example.com"},"price":{"amount":"7.00","currency":"USD","units":7,"unit_amount":"1.00"},"curl_example":"curl -X POST https://saimsara.com/create_checkout_session.php -d \"plan=evidence_object\" -d \"doc_key=digital::FITNESS_TRACKERS_PM\" -d \"customer_email=user@example.com\""},"access_after_payment":{"header":"X-SAIMSARA-Payment-Proof","endpoint":"https://saimsara.com/api/v1/evidence.php?doc_key=digital%3A%3AFITNESS_TRACKERS_PM","curl_example":"curl -H \"X-SAIMSARA-Payment-Proof: YOUR_PAYMENT_PROOF_TOKEN\" \"https://saimsara.com/api/v1/evidence.php?doc_key=digital%3A%3AFITNESS_TRACKERS_PM\""}}}