I'm confused. "Hourly 4s sprints" sounds like one 4 second sprint every hour but the second paragraph of the summary says > Purpose > This study determined if

I'm confused. "Hourly 4s sprints" sounds like one 4 second sprint every hour but the second paragraph of the summary says > Purpose > This study determined if the interruption of prolonged sitting (i.e.; 8-h of inactivity) with hourly cycling sprints of only 4-s duration each (i.e.; 4-s x 5 per h x 8-h = 160-s per day; SPRINTS) improves PPL. The 4-s sprints employed an inertial load ergometer and were followed by 45-s of seated rest. That's 5 per hour not 1 or once every 12 minutes