If you need metrics to guide you, maybe. But most folks I know who run or bike regularly haven't bothered getting tested unless they're hardcore data nerds. I

If you need metrics to guide you, maybe. But most folks I know who run or bike regularly haven't bothered getting tested unless they're hardcore data nerds. I know this is hand-wavy, but if you're already working up a sweat for at least 30 minutes twice a week, you're doing alright. If you're also lifting heavy things with proper form, you're doing great.