The Under Armour Women's Heatgear Alpha Printed Sports Bra The Under Armour HeatGear Alpha Women's Sports Bra is designed for mid-impact activities - this super-snug, classic-fitting sports bra is perfect for anything from Pilates and spinning to kickboxing and light cardio. That’s because its signature UA Compression fit minimises motion and maximises support. So you can go hard without losing your focus.