Kicking baby at 31wks

Glow <a href="https://play.google.com/store/apps/details?id=com.glow.android.nurture">nurture</a> just alerted me that my baby is now 31wks and will be sleeping a lot now. 
But that's not the case. He kicks vigorously. And don't think he rests enough. 
Should I be worried?