Cycling, don't bother about mounting anything on the bike itself...despite the great stabilisation ability of the GoPro, it will not be able to handle the constant judder of a direct mount to the bike...maybe road bike but definitely not MTB....unless you want some B roll and the shake is part of the plan...but generally stay away from handle bar/bike mounts...again MTB. A chesty is definitely the way to go for a bike, with the superview wide angle on, you get a great perspective..bars in foreground, the trail/road out back...and its more stable.... A head/helmet mount is another option, your head is a great gimbal! But footage become boring fast cause the view angle never changes...again, OK for B roll. Snowboarding...pole mount works great, a nice long extendable selfie stick.... chesty too but the angle needs to be set as you are facing sideways mostly...head/helmet mount works too. If you can get, use GoPro mounts they are better quality, their online shopping is not bad and in Europe should be able to deliver pronto.... stay away from cheap stuff on Ebay or Aliexpress, they almost always suck and made from cheap plastic and brittle.
