Do you use the regular strap? I've been trying to get into workout stuff but the regular strap never really keeps the device in place when I go for more than 10-15 minutes
I use the fitness strap and it works well, though sometimes I dial the back too tight and get a headache.
I upgraded to the elite strap with the extra battery pretty early on. Never feels loose, and I can easily work out for 60-90 mins without worrying about battery issues.