High‐intensity interval training
Classes were 45 min in duration, beginning with 10 min of warm‐up at 60%–70% peak HR, then four training blocks consisting of 4‐min high‐intensity work periods at 85%–95% peak HR interspersed with 3‐min low intensity work periods of at 60%–70% peak HR for a total of 28 min and concluding with 5–10 min of cool‐down at 60%–70% peak HR consisting of strength and stretching exercises. The participants choose to perform the HIIT sessions either on aerobic exercise equipment (treadmill, cycle ergometer, elliptical, etc.) or aerobic dance/movement sequences. HRs were monitored directly on the exercise equipment or with a Polar HR monitor (Polar RS800CX, Polar Electro Oy, Kempele, Finland).