Validation of an accelerometer system for measuring physical activity and sedentary behavior in healthy children and adolescents.

The study aims to assess the concurrent validity of the SENS motion® accelerometer system for device-based measurement of physical activity and sedentary behavior in healthy children and adolescents. Thirty-six healthy children and adolescents (mean ± standard deviation (SD) age, 10.2 ± 2.3 years) were fitted with three SENS sensors while performing standardized activities including walking, fast walking, sitting/lying, and arm movements. Data from the sensors were compared with video observations (reference criteria). The agreement between SENS motion® and observation was analyzed using Student's t-test and illustrated in Bland-Altman plots. The concurrent validity was further evaluated using intraclass correlation coefficient (ICC) and was expressed as standard error of measurement (SEM) and minimal detectable change (MDC). Strong agreement was found between SENS and observation for walking time, sedentary time, and lying time. In contrast, moderate agreement was observed for number of steps, sitting time, and time with and without arm movement. ICC2.1 values were overall moderate to excellent (0.5-0.94), with correspondingly low SEM% for walking time, sedentary time, lying time, and time with arm movement (2-9%). An acceptable SEM% level was reached for both steps and sitting time (11% and 12%). For fast walking time, the results showed a weak agreement between the measurement methods, and the ICC value was poor. CONCLUSION: SENS motion® seems valid for detecting physical activity and sedentary behavior in healthy children and adolescents with strong agreement and moderate to excellent ICC values. Furthermore, the explorative results on arm movements seem promising. WHAT IS KNOWN: • Inactivity and sedentary behavior follow an increasing trend among children and adolescents. • SENS motion® seems to be valid for measuring physical activity and sedentary behavior in adults and elderly patients. WHAT IS NEW: • SENS motion® seems valid with strong agreement between video observations and SENS measurement, and ICC values are moderate to excellent when measuring physical activity and sedentary behavior in healthy children and adolescents. • SENS motion® seems promising for detection of arm movements.

Effects of an exercise intervention for patients with advanced inoperable lung cancer undergoing chemotherapy: A randomized clinical trial.

OBJECTIVE: Exercise can improve treatment-related side effects, quality of life, and function in patients with various types of cancer; however, more evidence is needed for patients with advanced inoperable lung cancer. MATERIAL AND METHODS: We randomized 218 patients with advanced inoperable lung cancer to a 12-week supervised, structured exercise training program (aerobic, strength, and relaxation training) twice weekly versus usual care. Primary outcome was change in maximal oxygen uptake (VO2 peak). Secondary outcomes were muscle strength, functional capacity, forced expiratory volume in 1 s, health-related quality of life, anxiety, and depression. RESULTS: There was no significant difference between the intervention and control groups in VO2 peak. There was a significant improvement in muscle strength. There was also a significant difference between the two for social well-being (Functional Assessment of Cancer Therapy-Lung, FACT-L), anxiety, and depression. CONCLUSION: There was a significant reduction in the level of anxiety and depression and a significant increase in all muscle strength outcomes in the intervention group compared to patients randomized to usual care. There was a significant difference between the groups for social well-being. The primary outcome did not show a significant improvement in VO2 peak. Based on our results, future patients with advanced inoperable lung cancer should be considered for supervised exercise during the course of their disease.