The Intelligent Cardiopulmonary Rehabilitation System: A Feasibility Study

Study Overview
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Brief Summary
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The Intelligent Cardiopulmonary Rehabilitation System (ICRS) was developed to automatically control the resistance of pedaling in combination with the conventional stationary bike by monitoring the user's heart rate for clinical use. To test its feasibility, 8 healthy participants were recruited to complete 12 sessions (3 times per week for 4 weeks) of indoor cycling on the stationary bicycle with ICRS. Subjects were received cardiopulmonary exercise testing (CPET) before and after the biking sessions.The 60-80% of heart rate reserve (HRR) of each participant was determined according to their first CPET results. The algorithm of ICRS was designed to enable the bicycle to adjust its training intensity in accordance with the subject's 60-80% HRR which was detected by wearing a wristband heart rate monitor during cycling. With ICRS, the participants' heart rates during training were expected to fall in the 60-80% HRR, increasing their cardiopulmonary fitness after 12 sessions of indoor cycling.

Official Title
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The Intelligent Cardiopulmonary Rehabilitation System: A Feasibility Study in Healthy Subjects

Conditions
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Cardiac Rehabilitation

Intervention / Treatment
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* Device: ICRS


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: age of 20-50 no regular exercise habits no documented cardiopulmonary disease Exclusion Criteria: abnormal lung function medications affecting exercise capacity hypertension diabetes mellitus recent illness including upper respiratory tract infection the presence of any factor that may limit ability to participate in the CPET

Ages Eligible for Study
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Minimum Age: 20 Years
Maximum Age: 50 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Indoor cycling training<br>8 subjects were asked to complete indoor cycling training, 3 times a week for 4 weeks. Each session of training consisted of 30-minute stationary biking (5 minutes of warm-up, 20 minutes of training and 5 minutes of cooldown). | Device: ICRS<br>* The ICRS enables a stationary bike to automatically adjust the pedaling resistance (i.e. training intensity) according to the subject's heart rate. The training intensity is determined by monitoring whether the subject is able to maintain a 50-70 cycles/min cadence with 60-80% HRR. Subjects heart rate was detected by a wearable device for heart rate, synching with the stationary bike.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Peak oxygen consumption (VO2-peak) | Oxygen consumption (VO2- peak) were measured during our cardiopulmonary test (with a incremental biking and a gas analyzer). The workload was increased at a ramp rate of 5-10 W/min. A cadence at 50 70 rpm was to be maintained. | 4 weeks | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Peak workload | The peak workload is measured during a the cardiopulmonary exercise test with a ramped stationary biking. | 4 weeks | 
| Compliance of training during the training sessions | The percentage of time that a subject's heart rate falls in his or her estimated 60-80% HRR over the 12 sessions of training. | 4 weeks | 
| Averaged workload during the training sessions | The averaged workload (watt) that a subject paddled on the stationary bike over the 12 sessions of training. | 4 weeks | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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cardiac rehabilitation, cardiorespiratory fitness, aerobic exercise, endurance training