Have you lost weight? Had your sports bras for a while? Check they're really still giving you enough support. Remember: every bounce lengthens breast tissue. Mine are comfortable now which unfortunately means they're too big. I have Triumph Triaction Extreme and they've been great but I have lost weight and I need to go down a band size, so not sure what the right size will be. Off to the shops tomorrow. Check in front of a mirror if you're still bounce-proof!