Change in time in MVPA, objectively measured by avalidated tri-axial accelerometer (Actigraph) after a 12-week(semi)automated low-to-moderate intensity PA tele coaching program. At least 3valid weekdays (>8 hours of wearing time during the day) is necessary to label thisas a valid measurement.

Change in walking time, objectively measured by avalidated tri-axial accelerometer (Dynaport Movemonitor) after a 12-week(semi)automated low-to-moderate intensity PA tele coaching program. At least 3 valid weekdays (>8 hours of wearing time during the day) is necessary to label this as a valid measurement.

Change in movement intensity during walking, objectively measured by avalidated tri-axial accelerometer (Dynaport Movemonitor) after a 12-week(semi)automated low-to-moderate intensity PA tele coaching program. At least 3 valid weekdays (>8 hours of wearing time during the day) is necessary to label this as a valid measurement.

Change in sedentary time, objectively measured by avalidated tri-axial accelerometer (Actigraph) after a 12-week(semi)automated low-to-moderate intensity PA tele coaching program. At least 3 valid weekdays (>8 hours of wearing time during the day) is necessary to label this as a valid measurement.

A clinically relevant test to measure a patient's exercise capacity is the 6MWT. During this 6MWT the maximal intensity that a patient reaches during the test will be instrumented by the Actigraph. As the maximal intensity we will retrieve the mean VMU during the 6MWT. Day-by-day intensity can then be expressed as a % of this maximum.

Functional exercise capacity will be measured using a six-minute walk distance (6MWD) test. This test is a routinely used, valid, reliable and safe exercise test in patients with chronic respiratory diseases. The test is standardized in a 30m corridor and will be performed according to the protocol proposed by ERS/ATS.

Heart rate and oxygen saturation are measured before, during and after the test. Symptom scores for dyspnea and leg fatigue are assessed, at the beginning and end of the test, by the BORG scale. The 6MWD will be measured twice per visit.

Functional exercise capacity will be measured by a 1-min sit-to-stand (1MSTS) test and is a reliable, valid and responsive test for measuring functional exercise capacity in COPD patients. The 6MWD will be measured twice per visit.

The San Diego Shortness of Breath Questionnaire (SOBQ) will be used to assess self-reported shortness of breath while performing activities of daily living. Scores range from 0 (better) to 120 (worse).

Measured by Functional Assessment of Chronic Illness Treatment-Fatigue (FACIT-F). Maximum score is 160 and minimum score is 0. The higher the score, the better the quality of life.

Measured by the Depression, Anxiety and Stress scale (short-form) (DASS-21). For each scale it is needed to sum the scores for identified items. Because the DASS-21 is a short form version of the DASS (the long form has 42 items), the final score of each item groups needs to be multiplied by 2.

Interpretation of Depression score: 0-4=normal, 5-6=mild, 7-10=moderate, 11-13=severe, 14+=extremely severe.

Interpretation of Anxiety score: 0-3=normal, 4-5=mild, 6-7=moderate, 8-9=severe, 10+=extremely severe.

Interpretation of Stress score: 0-7=normal, 8-9=mild, 10-12=moderate, 13-16=severe, 17+=extremely severe.

The UCLA Loneliness Scale provides a reliable and valid assessment of loneliness across a variety of populations and data-collection methods. The total score ranges from 20 to 80. Higher scores indicate higher loneliness. The most commonly used categorization is the following: 20-34 denotes a low degree of loneliness, 35-49 a moderate degree of loneliness, 50-64 a moderately high degree of loneliness, and 65-80 a high degree of loneliness.

The European Organization for the Research and Treatment of Cancer Questionnaire and lung cancer module (EORTC QLQ-C30-LC13) is a clinically valid and useful tool for assessing disease- and treatment-specific symptoms in lung cancer patients participating in clinical trials, when combined with the EORTC core quality of life questionnaire. Scores for the EORTC-C30-QLQ and the lung cancer module each range from 0-100. Higher scores indicate a higher quality of life.

Measured by the 36-item Short Form Survey (SF-36). SF-36 scores range from 0 (worst) to 100 (best). Higher scores indicate a better quality of life.

The EQ-5D is a short questionnaire to assess general health status. There are 3,125 possible health states defined by combining one level from each dimension, ranging from 11111 (full health) to 55555 (worst health). The instrument also includes a visual analogue scale (EQ-VAS) which provides a single global rating of self-perceived health and is scored on a 0 to 100 mm scale representing "the worst…" and "the best health you can imagine", respectively.

The Exercise Self-Efficacy Scale (ESES) is a scale developed to measure a person's beliefs or confidence that they can perform various physical activities and exercise on a scale of 1-4. Scores range from 10 (worst) to 40 (best).

The modified Tampa Scale for Kinesiophobia (TSK) is a 17-item questionnaire that quantifies fear of movement [32]. Scores range from 17 (best) - 68 (worst).

The LIVAS is a questionnaire, tapping how a person perceives his or her physical abilities. The scale is based on the Perceived Physical Ability (PPA) scale (Ryckman et al., 1982). The questionnaire consists of 10 items, asking subjects to evaluate their physical abilities compared to other people of their own age.

The items have to be rated on a five-point scale.The scale scores therefore vary between 10 and 50. Higher scores represent more positive physical self-efficacy beliefs.

The self-Regulated Questionnaire-Exercise (SRQ-E) is a validated 16-item instrument including four regulation subscales used to assesses regulation styles (i.e., intrinsic motivation, identified regulation, introjected regulation and external regulation) in the participants. Using this instrument, participants will be asked reasons for exercising on a regular basis. There are four different types of behavioral regulation. They are external regulation, introjected regulation, identified regulation, and integrated regulation, in order from the least to the most fully internalized. Each participant gets a score on each subscale by averaging responses to each of the items that make up that subscale--for example, the average of all items representing introjected regulation would represent the score for that subscale.

Measured by Ecological Momentary Assessment (EMA) measured by m-Path smartphone application

Measured by the Short Physical Performance Battery (SPPB)This test assesses lower extremity function and mobility. It consists of 3 subtests that are scored and points are added up:

1. 4-meter gait speed
2. 5 times sit to stand
3. Balance test: In this test, patients take specific positions (side by side stand, semi-tandem stand and tandem stand) for a maximum of 10 seconds after demonstration of each foot position. Progressively the foot positions become more difficult.

Rating of the SPPB: Each task is scored out of 4 (0: worst performance - 4: best performance), with a total score from the tree subtests ranging from 0 (lower level of function) to 12 (higher level of function).

The Pittsburgh Sleep Quality Index (PSQI) is a self-reported questionnaire assessing sleep quality and patterns over the last month. The questionnaire consists of 19 items, divided into 7 domains: duration of sleep, sleep disturbance, sleep latency, day dysfunction due to sleepiness, sleep efficiency, overall sleep quality, and the need for medications to sleep. The PSQI has a total score between 0 and 21, where higher scores indicate a lower sleep quality. A score of 5 or more often indicates clinically significant sleep problems.

by having access to the patients' file for 2years

Is there need for follow-up cancer treatment? Will be documented by having access to the patients' file for 2years

The type of follow-up cancer treatment will be documented by having access to the patients' file for 2years

by having access to the patients' file for 2years

All adverse events will be collected and graded based on CTCAE 5.0 with information on severity, seriousness, relatedness to the intervention and sequelae; All interactions with the smartphone application and contacts with the coaches will be logged;

An interview will be performed to ask the patient about their experience of the intervention. The interview is a one-to-one voice-recorded interview with open-ended questions, taken by the researcher.

A questionnaire will be performed to ask the patient about their experience of the intervention. The questionnaire is on paper and will be filled out by the patient.