You can mix this up and try a different machine to keep it interesting. This will work with the bike or elliptical trainer.
Do the speed bursts here at the fastest pace you can safely maintain for the given time. Then blast off with short, all-out sprints. Warm Up 4 minutes SPEED BURST 4 MINS BLAST OFF 30 SECONDS RECOVERY 4 MINS SPEED BURST 3 MINS BLAST OFF […]