for people ages 18 years and up (full criteria)
at San Francisco, California
study started
estimated completion
Erin L Van Blarigan



There is a critical need for physical activity interventions in CRC. The investigators have developed a digital health physical activity intervention, Smart Pace, which includes a wearable tracker (Fitbit) and text messaging and aims to have patients build up to 150 min/wk of moderate activity. In this study, the investigators propose to expand and improve Smart Pace, including: 1) enrolling patients during chemotherapy; 2) tailoring text messages to individual preferences and treatment timing; and 3) adding resources to support home-based exercise. The study is a 12-week pilot randomized controlled trial (RCT) to evaluate the feasibility of this novel digital health physical activity intervention among 48 CRC patients on chemotherapy. The specific aims are to: 1) Determine the feasibility of the intervention via adherence and attrition, and determine the acceptability of the intervention via questionnaires and semi-structured interviews . 2) Estimate the effect of the intervention vs. usual care on physical activity, QOL, and symptoms at 12-weeks . And 3) Explore the impact of the intervention vs. usual care on fitness, weight, waist circumference, and blood pressure at 12-weeks.

Official Title

Self-monitoring and Reminder Texts to Increase Physical Activity After Cancer II (Smart Pace II)


Colorectal CancerColon CancerRectal Cancerphysical activitydigital healthtext messagesinterventionexerciserandomizedFitbitColorectal NeoplasmsFitbit and Text Messages


You can join if…

Open to people ages 18 years and up

  • Diagnosed with colon or rectal adenocarcinoma
  • Expected to receive at least 12 weeks of chemotherapy
  • Able to speak and read English
  • Access to a mobile phone with Internet and text messaging capabilities
  • ≥4 weeks since last major surgery and fully recovered
  • ≥18 years old
  • Physician consent to participate in unsupervised moderate intensity physical activity
  • ECOG performance status 0-1

You CAN'T join if...

  • Engaging in 150 minutes/week or more of moderate physical activity, 75 minutes/week or more of vigorous physical activity, or an equivalent combination
  • Hypertension that is not well-controlled (≥160/90) on anti-hypertensive therapy
  • Any contraindications to exercise, including, but not limited to: brain metastases; current congestive heart failure (New York Heart Association Class II, III or IV); serious or nonhealing wound, ulcer, or bone fracture; spinal cord compromise or instrumentation due to metastatic disease; peripheral neuropathy ≥grade 3; advanced COPD on oxygen
  • Serious cardiovascular event within 6 months including, but not limited to, transient ischemic attack (TIA), cerebrovascular accident (CVA), or myocardial infarction (MI)
  • Experiences shortness of breath, chest discomfort, or palpitations when performing activities of daily living
  • Has been told by a doctor that he/she has a heart condition and recommended to only engage in medically supervised activity
  • Chest pain brought on by physical activity
  • Developed chest pain in the past month


  • University of California, San Francisco accepting new patients
    San FranciscoCalifornia94158United States

Lead Scientist


accepting new patients
Start Date
Completion Date
University of California, San Francisco
Study Type
Last Updated