For those who want to know if they're improving their fitness or burning fat, the Polar FT7 Heart Rate Monitor is an excellent option. With features like The EnergyPointer that tells you if the main effect of your training is fitness improvement or fat burning you can focus your training better.
Body measurement features:
Average and maximum heart rate of training
Manual target zone - bpm (upper limit)
Polar EnergyPointer
Polar OwnCal - calorie expenditure
Polar OwnCode (5kHz) - coded transmission
Data transfer:
Compatible with polarpersonaltrainer.com - opt. with Polar FlowLink
Recording features:
Totals
Training files (with summaries) - 99
Weekly history
Training features:
Graphical target zone indicator
HeartTouch - button-free operation of wrist unit
Watch features:
Backlight
Date and weekday indicator
Display text in English, German, Finnish, Swedish, French, Portuguese, Spanish, and Italian
Dual time zone
KeyLock
Low battery indicator
Time of day (12/24h) with alarm and snooze
User replaceable battery
Water resistant - 30m