I have been using mine at work to build core strength. I am a QA rep for a call center.. and am constantly tied to a chair… and a pair of head phones. I have gained 20 pounds due to this “sedentary state.” I Joined a gym, did aerobics, everything I could and saw no results for several months. Once I added the ball to my daily routine I started to see results. My back is stronger, my core is stronger, and I am losing weight finally. This is in conjunction with all the other exercise I am doing though. I’m sure the extra 350 (or more) calories burned per day on the ball help to push this however. However I stay very active in that ball for 8 hours. I do crunches, bounce, dance… and stay active. When my back gets tired, and starts to hurt…(about once an hour) I do crunches (about 20 to 25) and stretch a bit. I find I do about 200 crunches on the ball per day. This also helps.
Data about how smartphone owners use their phones over the course of one week (Chapter 3) is taken from the American Trends Panel “experience sampling” survey, conducted November 10-16, 2014 among 1,635 respondents. Respondents were asked to complete two surveys per day for seven days (14 in total), using either an app they had installed on their phone (n=697) or by completing a web survey (n=938). All findings in this report are based on respondents who completed 10 or more surveys over the course of the week-long study period (n=1,035). The margin of sampling error for smartphone owners who completed 10 or more surveys is plus or minus percentage points. For more details about this survey, see Appendix C.